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5023 results about "Charge discharge" patented technology

A charge and discharge statement is an accounting statement for an account or estate over which someone has a fiduciary responsibility. Charge and discharge statements ultimately reconcile all distributions of income and principal going into and out of the account or estate.

Renewable energy integrated storage and generation systems, apparatus, and methods with cloud distributed energy management services

A software platform in communication with networked distributed energy resource energy storage apparatus, configured to deliver various specific applications related to offset demand monitoring, methods of virtual power plant and orchestration, load shaping services, methods of reducing demand at aggregated level, prioritizing computer programs related to virtual energy pool, energy cloud controllers methods, charge discharge orchestration plans of electric vehicles, distributed energy resources, machine learning predictive algorithms, value optimizing algorithms, autonomous sensing event awareness, mode selection methods, capacity reservation monitoring, virtual power plant methods, advanced DER-ES apparatus features, energy management system for governing resources and methods, aggregated energy cloud methods, load shaping methods, marginal cost cycle-life degradation, load shaping API, forward event schedule, on demand request, and load service state request methods. Various rules, constraints of predictive algorithms for signal inputs to determine incremental storage cycles, cycle life degradation marginal cost, iterative and forward event schedule development, and load control.
Owner:SUNVERGE ENERGY

Lithium alloy/sulfur batteries

Electrochemical cells including anode compositions that may enhance charge-discharge cycling efficiency and uniformity are presented. In some embodiments, alloys are incorporated into one or more components of an electrochemical cell, which may enhance the performance of the cell. For example, an alloy may be incorporated into an electroactive component of the cell (e.g., electrodes) and may advantageously increase the efficiency of cell performance. Some electrochemical cells (e.g., rechargeable batteries) may undergo a charge / discharge cycle involving deposition of metal (e.g., lithium metal) on the surface of the anode upon charging and reaction of the metal on the anode surface, wherein the metal diffuses from the anode surface, upon discharging. In some cases, the efficiency and uniformity of such processes may affect cell performance. The use of materials such as alloys in an electroactive component of the cell have been found to increase the efficiency of such processes and to increase the cycling lifetime of the cell. For example, the use of alloys may reduce the formation of dendrites on the anode surface and / or limit surface development.
Owner:SION POWER CORP

Solid-state image pickup device and device driving control method for solid-state image pickup

ActiveUS7271835B2Reduce picture degradationSuppress quasi-blooming phenomenonTelevision system detailsTelevision system scanning detailsImage formationEngineering
Disclosed herein is a solid-state image pickup device including: a plurality of unit pixels each having: a charge generating section for generating a charge, a charge storage section for storing the charge generated by the charge generating section, a transfer gate section disposed between the charge generating section and the charge storage section for transferring the charge generated by the charge generating section to the charge storage section, and a pixel signal generating section for generating a pixel signal corresponding to the charge stored in the charge storage section; an unnecessary charge discharging gate section in each the unit pixel, switchable to block a flow of an unnecessary charge that is generated in the charge generating section and does not contribute to image formation, according to height of an electric barrier; and an unnecessary charge drain section disposed on an opposite side of the unnecessary charge discharging gate section from the charge generating section for receiving the unnecessary charge swept out of the charge generating section through the unnecessary charge discharging gate section.
Owner:SONY CORP

Secondary lithium ion battery containing a prelithiated anode

The present invention provides a lithium ion battery that exhibits a significantly improved specific capacity and much longer charge-discharge cycle life. In one preferred embodiment, the battery comprises an anode active material that has been prelithiated and pre-pulverized. This anode may be prepared with a method that comprises (a) providing an anode active material (preferably in the form of fine powder or thin film); (b) intercalating or absorbing a desired amount of lithium into the anode active material to produce a prelithiated anode active material; (c) comminuting the prelithiated anode active material into fine particles with an average size less than 10 μm (preferably <1 μm and most preferably <200 nm); and (d) combining multiple fine particles of the prelithiated anode active material with a conductive additive and / or a binder material to form the anode. Preferably, the prelithiated particles are protected by a lithium ion-conducting matrix or coating material. Further preferably, the matrix material is reinforced with nano graphene platelets.
Owner:GLOBAL GRAPHENE GRP INC

Cathode Active Material Coated With Fluorine Compound for Lithium Secondary Batteries and Method for Preparing the Same

InactiveUS20090087362A1Inhibition of performance deteriorationHigh voltageElectrode manufacturing processesLithium compoundsLithiumHigh rate
Disclosed herein is a cathode active material coated with a fluorine compound for lithium secondary batteries. The cathode active material is structurally stable, and improves the charge-discharge characteristics, cycle characteristics, high-voltage characteristics, high-rate characteristics and thermal stability of batteries.
Owner:ENERCERAMIC

Cathode active material coated with fluorine compound for lithium secondary batteries and method for preparing the same

Disclosed herein is a cathode active material coated with a fluorine compound for lithium secondary batteries. The cathode active material is structurally stable, and improves the charge-discharge characteristics, cycle characteristics, high-voltage characteristics, high-rate characteristics and thermal stability of batteries.
Owner:ENERCERAMIC

Electrode plate for lithium ion battery and manufacturing method thereof

InactiveCN101710619AChange the conductive contact interfaceImprove conductivityCell electrodesAdhesiveEngineering
The invention discloses an electrode plate for a lithium ion battery and a manufacturing method thereof, and particularly relates to the electrode plate for the lithium ion battery taking multi-layer graphene as a conductive agent and a manufacturing method thereof. The electrode plate of the invention consists of a positive electrode or negative electrode active substance, the conductive agent and an adhesive. The method comprises the steps of: using the positive electrode or negative electrode active substance, the conductive agent and the adhesive as raw materials to obtain electrode slurry through stirring and dispersing, and then obtaining the electrode plate through coating, drying and tabletting. The conductive agent adopted by the invention has the advantages of high dispersivity, high electric conductivity, good filling effect and the like; and the method has the advantages of simplicity, low production cost and convenient popularization and application. The method can remarkably improve the electric conductivity, electrochemical capacity and enhance charge-discharge capability of electrode materials by multiples, so the method can be widely applied to the preparation of electrode plates of lithium ion batteries.
Owner:CHONGQING UNIV

Battery, method of charging and discharging the battery and charge-discharge control device for the battery

Provided is a battery capable of improving cycle characteristics through reducing a structural fracture according to charge and discharge of an anode and a reaction of the with an electrolyte. An anode active material layer includes at least one kind selected from the group consisting of a simple substance and alloys of Si capable of forming an alloy with Li. A cathode and an anode are formed so that the molar ratio Li / Si in the anode at the time of charge is 4.0 or the potential of the anode vs. Li is 0.04 V or more through adjusting, for example, a ratio between a cathode active material and an anode active material. Moreover, the cathode and the anode are formed so that the molar ratio Li / Si in the anode at the time of discharge is 0.4 or more, or the potential of the anode vs. Li is 1.4 V or less.
Owner:SONY CORP

Fully automatic and energy-efficient deionizer

A fully automatic deionizer comprising five sub-systems for removing ionic contaminants from various liquids at low energy consumption is devised. Based on the charging-discharging principle of capacitors, the deionizer conducts deionization through applying a low DC voltage to its electrodes for adsorbing ions, while more than 30% of the process energy is recovered and stored by discharging the electrodes. At the mean time of discharge, surface of the electrodes is regenerated on site and reset for performing many more cycles of deionization-regeneration till the desirable purification is attained. In one moment, both deionization and regeneration proceed simultaneously on different groups of electrode modules, and in the next moment the electrode modules quickly switch the two processes. Such swift reciprocating actions are engaged in synchronized coordination of sub-systems of electrode modules, energy management, fluid flow, and automatic control.
Owner:GAINIA INTELLECTUAL ASSET SERVICES

High voltage battery formation protocols and control of charging and discharging for desirable long term cycling performance

Improved cycling of high voltage lithium ion batteries is accomplished through the use of a formation step that seems to form a more stable structure for subsequent cycling and through the improved management of the charge-discharge cycling. In particular, the formation charge for the battery can be performed at a lower voltage prior to full activation of the battery through a charge to the specified operational voltage of the battery. With respect to management of the charging and discharging of the battery, it has been discovered that for the lithium rich high voltage compositions of interest that a deeper discharge can preserve the cycling capacity at a greater number of cycles. Battery management can be designed to exploit the improved cycling capacity obtained with deeper discharges of the battery.
Owner:IONBLOX INC

Charge-discharge management apparatus and computer readable medium comprising instructions for achieving the apparatus

After a final estimated route for a hybrid vehicle is specified, a navigation ECU determines a start point of a scheduled path, which a charging schedule is to be created for. The start point corresponds to a position at a travel distance, which is equivalent to a distance traveled from a present position of the hybrid vehicle along the estimated route for a time period required for creating a charging schedule.
Owner:DENSO CORP

Negative pole for a secondary cell, secondary cell using the negative pole, and negative pole manufacturing method

An anode for a secondary battery capable of inserting and extracting a lithium ion having a multi-layered structure including a first anode layer (2a) containing carbon as a main component; a second anode layer (3a) made of a film-like material through which a lithium component passes; and a third anode layer (4a) containing lithium and / or a lithium-containing compound as a main component. The battery capacity of the lithium ion battery is substantially increased while the higher charge-discharge efficiency and the stable cycle performance are maintained.
Owner:NEC CORP

Renewable energy integrated storage and generation systems, apparatus, and methods with cloud distributed energy management services

A software platform in communication with networked distributed energy resource energy storage apparatus, configured to deliver various specific applications related to offset demand monitoring, methods of virtual power plant and orchestration, load shaping services, methods of reducing demand at aggregated level, prioritizing computer programs related to virtual energy pool, energy cloud controllers methods, charge discharge orchestration plans of electric vehicles, distributed energy resources, machine learning predictive algorithms, value optimizing algorithms, autonomous sensing event awareness, mode selection methods, capacity reservation monitoring, virtual power plant methods, advanced DER-ES apparatus features, energy management system for governing resources and methods, aggregated energy cloud methods, load shaping methods, marginal cost cycle-life degradation, load shaping API, forward event schedule, on demand request, and load service state request methods. Various rules, constraints of predictive algorithms for signal inputs to determine incremental storage cycles, cycle life degradation marginal cost, iterative and forward event schedule development, and load control.
Owner:SUNVERGE ENERGY

Lithium ion battery internal temperature monitoring method

The invention discloses a lithium ion battery internal temperature monitoring method. The monitoring method includes the following steps that a charge-discharge tester is used for carrying out charge-discharge tests on a lithium ion battery on different environment conditions to obtain a battery surface temperature change curve; related parameters such as battery internal resistance and an open-circuit voltage temperature coefficient are tested, and a lithium ion battery electric heating coupling model based on a variable heat production rate is set up; the temperature rise change of the discharge process of the battery is simulated to obtain a temperature change simulation curve; the experiment test temperature change curve and the simulation curve are analyzed and compared to optimize and verify the electric heating coupling model; the influence between the battery internal temperature and the battery surface temperature as well as the influence between the discharge currents and the discharge depth are analyzed, and a lithium ion battery internal temperature model is constructed; the battery internal temperature is monitored in real time according to the model. The lithium ion battery internal temperature monitoring method is simple and easy to implement, small in estimation error and capable of well meeting the requirement for monitoring the battery internal temperature in real time.
Owner:ZHEJIANG COLLEGE OF ZHEJIANG UNIV OF TECHOLOGY

Separator for battery, method for manufacturing the same, and lithium secondary battery

The separator for a battery according to the present invention is a separator for a battery including an insulator layer containing a fibrous material having a heat resistant temperature of equal to or higher than 150° C., insulating inorganic fine particles and a binder, or a separator for a battery including a porous layer formed of a thermal melting resin and an insulator layer containing insulating inorganic fine particles and a binder, wherein water content per unit volume is equal to or smaller than 1 mg / cm3 when the separator is held for 24 hours in an atmosphere with a relative humidity of 60% at 20° C. The use of the separator for a battery according to the present invention makes it possible to provide a lithium secondary battery that has favorable reliability and safety and is excellent in storage characteristics and charge-discharge cycle characteristics.
Owner:MAXELL HLDG LTD

Nitrogen-doped porous carbon material for lithium-air battery positive electrode

The present invention relates to a nitrogen-doped porous carbon material for a lithium-air battery positive electrode, wherein the nitrogen-doped porous carbon material has an interconnected graded pore structure, N is uniformly doped in the C skeleton, N accounts for 0.2-15% of the carbon material atomic ratio, the graded pores comprise mass transfer pores and deposition holes, the deposition holes account for 40-95% of the total pore volume, and the mass transfer pores account for 4-55% of the total pore volume. According to the present invention, with application of the carbon material as the lithium-air battery electrode material, the space utilization rate of the carbon material during the charge-discharge process can be increased at a maximum, and the energy density and the power density of the lithium-air battery can be effectively increased; and the preparation process is simple, the material source is wide, the pore structure of the graded pore carbon material can be regulated, the regulation manner is diverse, and the nitrogen doping manner is easily achieved.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

Positive electrode and preparation method therefor, and lithium secondary battery

The invention discloses a positive electrode and a preparation method therefor, and a lithium secondary battery employing the positive electrode. The positive electrode comprises a conductive substrate, a positive electrode active material layer and a lithium-compensating layer which is arranged between the conductive substrate and the positive electrode active material layer; the lithium-compensating layer comprises at least a kind of lithium-containing compound, at least a kind of conductive agent and at least a kind of binder; the lithium-containing compound is chosen from the group formed by the compound as shown in the formula Li<x>A, wherein A is O, P, S or N; and x is greater than 0 and less than or equal to 3. The positive electrode provided by the invention has the lithium-compensating function, and is capable of effectively compensating the irreversible capacity loss of the lithium secondary ion in the charging-discharging process and improving the energy density of the battery; the lithium secondary ion has excellent cycling performance and high-rate discharging performance; the positive electrode provided by the invention does not require metal lithium; compared with the battery adopting metal lithium, the severity on the operating environment and operation process is lowered; and therefore, the positive electrode provided by the invention can be prepared by a conventional process under conventional conditions.
Owner:BYD CO LTD

Positive electrode active material for secondary battery, positive electrode for secondary battery, secondary battery and method for producing positive electrode active material for secondary battery

ActiveUS20060035151A1Minimization of increase in resistanceMinimization of in reduction in capacityNon-aqueous electrolyte accumulatorsOrganic electrolyte cellsManganateManganese
A life of a secondary battery is extended, increase in a resistance when storing a secondary battery at an elevated temperature is prevented, and increase in a resistance during a charge-discharge cycle is prevented. A positive electrode active material comprising a lithium manganate and a lithium nickelate are used. The lithium manganate is a compound represented by the following formula (1) or the compound in which some of Mn or O sites are replaced with another element: Li1+xMn2−xO4  (1) (in the above-shown formula (1), 0.15≦x≦0.24).
Owner:NEC CORP

Lithium ion battery with improved low-temperature charging-discharging performance and preparation method thereof

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a lithium ion battery with improved low-temperature charging-discharging performance and a preparation method thereof. The lithium ion battery comprises a naked core which is formed by overlapping a positive plate, an isolating membrane and a negative plate in sequence and winding along the same direction, and electrolyte thereof, wherein the positive plate comprises a positive current collector and a positive diaphragm with which the positive current collector is coated; the negative plate comprises a negative current collector and a negative diaphragm with which the negative current collector is coated; a first blank area is formed at one end of the positive current collector; a first conductive terminal is welded in the first blank area; a second black area is formed at one end of the negative current collector; a second conductive terminal is welded in the second blank area; the other end of the positive current collector and / or the negative current collector is provided with a third blank area; a third conductive terminal is arranged in the third blank area. In the lithium ion battery, the third conductive terminal is arranged on a plate, and is used for heating the battery at a low temperature, so that the battery can be kept at a normal temperature, and the charging-discharging performance of the battery at a low temperature is improved.
Owner:HUNAN LIFANG NEW ENERGY SCI & TECH

Relay welding detector and detecting method

Frequency of judgment of welding of relays is increased to increase likelihood of early detection of welding. It is determined that a battery 22 is not being recharged or discharged when a vehicle speed V of an electric vehicle is approximately 0 and a brake pedal 54 is pressed, and a switching element of an inverter 24 is controlled to be switched to discharge electric charges which are stored in a capacitor 44. After discharging, relays 30, 32 are turned off, and voltages RV1, RV2 between the terminals of the relays 30, 32 are detected by voltmeters 40, 42 to judge whether either of the voltages RV1, RV2 has a threshold value RVref (approximate value 0) or less. When it is so determined, it is judged that the relays 30, 32 are welded, and an LED 70 is illuminated.
Owner:TOYOTA JIDOSHA KK

Anode active material, method of preparing the same, anode and lithium battery containing the material

Silicon oxide based anode active materials are provided. In one embodiment, the active materials include silicon oxides represented by the general formula SiOx, where 0<x<0.8. The anode active materials include silicon oxides having low oxygen contents. Further, anodes and lithium batteries employing such anode active materials have excellent charge-discharge characteristics.
Owner:SAMSUNG SDI CO LTD

Coordination control and optimization method for battery energy accumulation and photovoltaic power generation based on co-direct current bus

The invention discloses a coordination control and optimization method for battery energy accumulation and photovoltaic power generation based on a co-direct current bus in synchronization and independent operation modes, which supports the access of various types of storage batteries and photovoltaic battery boards through the free combination of the co-direct current bus of a DC (Direct Current) / DC converter, the automatic intelligent charge-discharge management of a storage battery branch and the maximum power tracing management of a photovoltaic battery board branch, wherein the branches are completely independently controlled to realize optimization management; the energy collected by a direct current bus is interacted with the energy of a power grid or an independent load through a post DC / AC (Alternating Current) converter; the DC / AC converter adopts a method for carrying out directional vector control on the voltage of the power grid and modulating the space vector pulse widthof the voltage in the course of the synchronization operation in an active and reactive complete decoupling control mode; and V / f control is adopted in the course of the independent operation to provide a constant voltage and frequency reference to an alternating current bus. The result of an experiment proves that the invention can realize the coordination complementary control and the autonomous optimization management of photovoltaic power storage and has the advantages of good generality, practicality and application prospects.
Owner:BEIJING SIFANG JIBAO AUTOMATION +1

Lithium secondary battery and method of manufacturing the same

[Problem] An object of the invention is to provide a lithium secondary battery that shows good cycle performance and at the same time prevents a battery thickness increase due to charge-discharge cycles, and a method of manufacturing such a battery.[Means for Solving the Problem] A lithium secondary battery includes a negative electrode (2) having a negative electrode current collector (11) and a negative electrode active material layer (12) disposed on the negative electrode current collector (11), a positive electrode (1) having a positive electrode active material, a separator (3), and a non-aqueous electrolyte. The negative electrode active material layer includes negative electrode active material particles and a negative electrode binder, and the negative electrode active material particles include silicon particles and / or silicon alloy particles. The silicon particles and the silicon alloy particles have a crystallite size of 100 nm or less.
Owner:PANASONIC ENERGY CO LTD

Method and apparatus for charge discharge power control

Limit values of battery charging and discharging power are set by a battery charge discharge control apparatus, based on the estimation of the internal resistance of a battery according to a detected battery temperature and the sampling of a battery current and a battery voltage respectively detected by a current sensor and a voltage sensor. The limit values are used to control the battery current and the battery voltage to be within a current use range and a voltage use range of the battery, according to conditions of the battery in a vehicle.
Owner:DENSO CORP

Intelligent charge-discharge controller for battery and electronic device having same

An intelligent charge-discharge controller for a battery includes a charging voltage test circuit configured for testing an input voltage of the battery when in charge; a charging current control circuit configured for controlling an input current of the battery based on the tested input voltage; a battery voltage test circuit configured for testing a current voltage of the battery; and a discharging current control circuit configured for controlling a discharging current of the battery. The charging voltage test circuit and the battery voltage test circuit each are electrically connected to the charging current control circuit, and the charging voltage test circuit and the discharging current control circuit have a common circuit section. An electronic device having the intelligent charge-discharge controller is also provided.
Owner:SHENZHEN FIRST UNION TECH CO LTD

Positive electrode of lithium-sulfur battery with multifunctional elastic protection layer

InactiveCN105322132AThere is no effect on the charging and discharging processImprove stabilityNon-aqueous electrolyte accumulator electrodesCapacity lossLithium–sulfur battery
The invention relates to a positive electrode of a lithium-sulfur battery with a multifunctional elastic protection layer. The positive electrode of the lithium-sulfur battery comprises a positive material layer and the multifunctional elastic protection layer, wherein the multifunctional elastic protection layer is formed on the surface of the positive material layer and comprises a polymer and / or a conductive carbon material; and the thickness of the multifunctional elastic protection layer is 0.1-50 microns. The multifunctional elastic protection layer is introduced to the surface of the positive material layer of the lithium-sulfur battery; the multifunctional elastic protection layer has elasticity and conductivity; and has no influence on charge and discharge processes of the positive electrode of the lithium-sulfur battery; compared with the positive electrode of the lithium-sulfur battery without protection from a multifunctional elastic layer structure, the prepared positive electrode of the lithium-sulfur battery with the protection of the multifunctional elastic layer structure has good stability; a structural damage to the positive electrode caused by the volume effect in a charge-discharge cycle process of the battery can be relieved; and meanwhile, the added multifunctional elastic layer structure can ensure that an active material in the positive electrode is not greatly dissolved into an electrolyte to cause the capacity loss.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI

Composite hard carbon cathode material of lithium ion battery and preparation method thereof

The invention discloses a composite hard carbon cathode material of a lithium ion battery and a preparation method thereof, aiming at improving the first coulombic efficiency. In the composite hard carbon cathode material, a coating object is coated outside a hard carbon matrix, a precursor of the hard carbon matrix comprises a thermoplastic resin which forms the hard carbon matrix by pyrolysis, and a precursor of the coating object is an organic matter. The preparation method comprises the steps of curing, pyrolyzing, pulverizing and coating. Compared with the prior art, a curing agent and adopant are added to the resin for curing, the cured mixture is taken as a carbon source, and then the carbon source is pyrolyzed and coated to finally obtain the composite hard carbon cathode material; and the first reversible capacity of the obtained composite hard carbon cathode material is more than 455.2mAh / g and the first coulombic efficiency thereof is more than 79.4% in the case of 0.2C, thus the obtained composite hard carbon cathode material has high capacity and high first coulombic efficiency, meets the requirement of the lithium ion battery with high capacity, high multiplying power and excellent high and low temperature cycle performance on the charge-discharge performances of the cathode material, has low production cost and is suitable for industrial production.
Owner:JIXI BTR GRAPHITE IND PARK CO LTD +2

Intelligent resident electricity utilization management method and management system

The invention discloses an intelligent resident electricity utilization management method and a management system. The management system comprises an intelligent electric energy meter, a collector, a concentrator, a host station server, a short message platform, an energy storage element, and an electric vehicle electricity charging and conversion management module. The management method comprises the steps of intelligent acquisition for the resident electricity consumption condition, ordered electricity utilization management realization, on-line energy charge calculation, line loss analysis for power distribution grid which directly powers resident users, management in energy storage element access and charge-discharge, and management in conversion and charging of the electric vehicle. Through the management system and the management method, the advantages of intelligent electricity utilization management, improved management efficiency, and reduced management cost are achieved.
Owner:SHENZHEN CLOU ELECTRONICS

Sulfenyl anode of lithium-sulfur rechargeable battery and preparation method thereof

The invention discloses sulfenyl anode of a lithium-sulfur rechargeable battery and a preparation method thereof. The sulfenyl anode is prepared by the steps of: equally mixing sulfenyl compound active material, cyclodextrin binder and carbon conductivity agent, coating the mixture on an aluminum foil current collector and obtaining the sulfenyl anode after drying and pressing. The coating thickness is 50 to 100 microns and the aluminum foil thickness is 20 to 30 microns; the mass ratio of the sulfenyl compound active material, the cyclodextrin binder and the carbon conductivity agent is 7 to 8:0.6 to 1:0.6 to 1.5, wherein the sulfenyl compound active material is formed by the steps of: equally mixing carbon nano tube, sulfur and polyacrylonitrile according to the mass ratio of 0.1 to 0.2:6 to 8:1 and sintering the mixture in protection of inert gas at the temperature of 300 to 320 DEG C for insulation for 6 to 8 hours. By using the lithium-sulfur rechargeable battery with the sulfenyl anode and lithium metal cathode, the reversible capacity of the sulfenyl compound active material reaches 680mAh.g under 0.1C multiplying power charge-discharge condition; and compared with the discharge capacity of second circulation, the discharge capacity after 100 times of circulation decreases less than 10 percent.
Owner:SHANGHAI JIAO TONG UNIV
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