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Chargable chemical energy-storage device and application thereof

A technology of energy storage and devices, which is applied in the field of rechargeable chemical energy storage devices, can solve the problems of battery safety hazards, resource shortage, and poor recycling economy, and achieve the effects of high power density, long life, and high safety

Inactive Publication Date: 2014-07-02
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Repeated entry and exit of ions in the lattice can easily cause expansion and contraction of the lattice, resulting in uneven stress distribution and cracks in the material, thus affecting cycle performance
Thirdly, due to the limited reserves of lithium resources in the world, lithium-ion batteries are widely used in electric vehicles and smart grids, and the recycling of lithium-ion batteries is economical, which will inevitably lead to rising costs of lithium-ion batteries and resource shortages and unsustainability
In addition, at present, lithium-ion batteries mainly use organic liquid or polymer electrolytes, and there are great safety hazards in the process of overcharging, over-discharging or high-current charging and discharging.

Method used

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  • Chargable chemical energy-storage device and application thereof
  • Chargable chemical energy-storage device and application thereof
  • Chargable chemical energy-storage device and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The positive electrode material PTAm (P an1) Mix with carbon tubes and binders in proportions of 80%, 15%, and 5%, but not limited to this proportion, grind evenly, coat on stainless steel mesh, and dry pole pieces for later use. The negative electrode material NTCDA-PI (P an 1) Mix with carbon tubes and binders in proportions of 80%, 15%, and 5%, but not limited to this proportion, grind evenly, coat on stainless steel mesh, and dry pole pieces for later use. Using non-woven fabric as the separator, 10M NaNO 3 The aqueous solution is used as the electrolyte, and the positive and negative electrodes are assembled into a rechargeable chemical energy storage device, which is charged and discharged at a rate of 0.5C, 1C and 5C. figure 2 The charge-discharge curve of the rechargeable chemical energy storage device at a rate of 0.5C for the first week and the cycle performance at a rate of 5C (the capacity retention rate after 500 cycles is 95%).

Embodiment 2

[0033] Following the method for electrode preparation in Example 1, carbon felt was used as a current collector to prepare positive electrode PTMA (P ca 2), negative NTCDA-PI (P an 1) Electrode, using non-woven fabric as separator, 6M NaCl aqueous solution as electrolyte, assembling positive and negative electrodes into rechargeable chemical energy storage devices, charging and discharging at 0.5C and 5C rates, see Table 1.

Embodiment 3

[0035] Following the method of electrode preparation in Example 1, positive electrode PTGE (P ca 3), negative NTCDA-PI (P an 1) Pole piece, using non-woven fabric as diaphragm, NaPF 6 Saturated aqueous solution of 100% is used as the electrolyte, and the positive and negative electrodes are assembled into a rechargeable chemical energy storage device, which is charged and discharged at a rate of 0.5C and 5C, as shown in Table 1.

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Abstract

The invention discloses a chargable chemical energy-storage device and application thereof. The positive electrode of the energy-storage device employs an organic material capable of realizing anion X- doping / dedoping; the negative electrode of the energy-storage device employs an organic or inorganic material capable of realizing cation M+ embedding / escaping; the electrolyte of the energy-storage device is an aqueous solution, non-aqueous organic solution, molten salt system or the like, and the mass fraction of a solute MX in the electrolyte reaches 80 to 110% of the mass fraction of the saturated solution of the electrolyte. According to the invention, reversible charging and discharging are realized through gain and loss of electrons in virtue of difference of states and potentials of reversible bonding of anions and cations of the solute salt in the electrolyte respectively with the positive electrode and the negative electrode. The chargable chemical energy-storage device provided by the invention has the characteristics of high power density, long life, high security, low cost, etc., is a green power supply and widely applicable and can be used in fields with requirements for long life and low cost and low requirement for energy density according to the structure of the device.

Description

technical field [0001] The invention relates to a rechargeable chemical energy storage device and its application, in particular to a rechargeable chemical energy storage device based on an organic or inorganic electrode material in an aqueous or non-aqueous organic electrolyte system and its application. Background technique [0002] Lithium-ion batteries, as a rechargeable chemical energy storage device with high energy storage density and power density, have been widely used in portable electronic devices and will be widely used in electric vehicles. The advantage of lithium-ion batteries is their high energy density (80-230Wh / kg). The energy storage mechanism of lithium-ion batteries is to store lithium ions and electrons in the lattice of the material. Since the diffusion of ions in the solid phase at low temperature and room temperature is a rate-controlling step, the power characteristics of lithium-ion batteries are generally less than 3C. Repeated entry and exit of...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M4/60H01M4/62H01M10/056
CPCY02E60/122H01M4/60H01M4/602H01M10/04Y02E60/10
Inventor 胡勇胜潘慧霖李泓陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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