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Water system secondary battery

A secondary battery and water system technology, applied in the field of electrochemical energy storage, can solve the problem of secondary hybrid batteries failing to get rid of them, and achieve the effects of low production cost, high operational safety, and reduced overpotential for hydrogen evolution

Inactive Publication Date: 2017-11-28
POSITEC POWER TOOLS (SUZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Up to now, the structure of the proposed aqueous lithium-ion secondary hybrid battery has not been able to get rid of the structure based on the principle of lithium ion extraction / intercalation, such as the reported VO 2 / LiMn 2 0 4 ,LiV 3 0 8 / LiNi 0.81 co 0.19 0 2 ,TiP 2 0 7 / LiMn 2 0 4 ,LiTi 2 (P0 4 ) 3 / LiMn 2 0 4 ,LiV 3 o 8 / LiCoO 2 Wait

Method used

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Examples

Experimental program
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Effect test

no. 1 approach

[0041] An aqueous secondary battery, such as figure 1 As shown, a positive electrode 10, a negative electrode 20, and an electrolyte (not shown) are included. The positive electrode 10 includes a positive electrode current collector 12 and a positive electrode active material 14 that participates in an electrochemical reaction. The positive electrode active material 14 can reversibly extract and intercalate ions; the negative electrode 20 includes a negative electrode 19 that includes metal zinc or metal zinc and oxide A mixture of zinc; the electrolyte includes at least one solvent capable of dissolving and ionizing the electrolyte; the electrolyte includes at least one ion 16 capable of reversible extraction-intercalation of the positive active material; the pH of the electrolyte is >8.

[0042] refer to figure 1 as shown, figure 1 It is a schematic diagram of the battery structure of the first embodiment of the present invention.

[0043] The positive electrode active...

no. 2 approach

[0085] Please refer to image 3 As shown, the second embodiment of the present invention provides a battery, and the difference from the battery described in the first embodiment is: in the second embodiment, the negative electrode active material 24 is formed on the surface of the negative electrode current collector 22, and the negative electrode active material 24 Can be oxidized-dissolved into active ions 28 during discharge.

[0086] The negative electrode collector 22 is only used as a carrier for electron conduction and collection, and does not participate in the reaction of the negative electrode 20. The negative electrode active material 24 is formed on the negative electrode collector 22 by coating, electroplating or sputtering. The sputtering method includes but is not limited to magnetron sputtering. Specifically, the negative electrode current collector 22 is copper foil, the negative electrode active material 24 is zinc, and the zinc is formed on the surface of ...

Embodiment 1-1

[0108] Take LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 As the positive electrode active material, mix the positive electrode active material, conductive agent graphite KS6, binder CMC and SBR in water according to the mass ratio LMO:KS6:CMC:SBR=86.5:10:1:2.5 to form a uniform positive electrode slurry. The positive electrode slurry is coated on the positive electrode current collector graphite foil to form an active material layer to make a positive electrode with a surface density of 25 mg / cm 2 .

[0109] Zinc foil was used as the negative electrode, and glass fiber (AGM) was used as the separator.

[0110] Weigh a certain quality of zinc sulfate and lithium sulfate, add them to dissolve in water, configure an electrolyte solution with a concentration of zinc sulfate of 1mol / L and a concentration of lithium sulfate of 1.5mol / L, mix LiOH to adjust the pH value of the electrolyte to 12 to obtain electrolysis solution, assemble the positive electrode, negative electrode and diaphragm into ...

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Abstract

The invention relates to a water system secondary battery, in particular an alkaline water system secondary lithium ion battery and a preparation method and an application thereof. The invention also relates to electrolyte liquid for the water system secondary battery. The battery comprises an anode, a cathode and the electrolyte liquid. The active substance of the anode is ions, through which a NMC type active substance can be reversibly deviated or embedded; the electrolyte liquid comprises at least one solvent capable of dissolving electrolyte and ionizing electrolyte; the electrolyte comprises ions, through which the active substance of the anode can be reversibly deviated or embedded; the pH of the electrolyte liquid is greater than 8, and the charge-discharge voltage range is 1.40-2.10V. The oxidation corrosion of carbon in an anode conductive agent can be inhibited, and the hydrogen evolution phenomenon of cathode can be alleviated.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage, and specifically relates to a water-based secondary battery, in particular to an alkaline water-based secondary lithium-ion battery and a preparation method and application of the battery. At the same time, the invention also relates to a water-based secondary battery. Electrolyte for batteries. Background technique [0002] With the continuous consumption of petroleum resources and the increasing environmental pollution, the development of renewable energy such as wind energy, solar energy and electric vehicles has become a global issue. One of the key technical bottlenecks is the energy storage battery. The secondary hybrid batteries currently developed are mainly concentrated in lithium-ion batteries, high-temperature sodium-sulfur batteries, sodium-nickel-chloride batteries and vanadium flow batteries. Each of these batteries has its own advantages. Among them, lithium-ion batt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M4/505H01M4/525
CPCH01M4/505H01M4/525H01M10/36H01M2220/20H01M2220/30Y02E60/10
Inventor 刘洋陈璞
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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