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Positive electrode material and battery

A positive electrode material and battery technology, applied in the direction of battery electrodes, lead-acid batteries, lead-acid battery construction, etc., can solve the problems of battery cycle life reduction, battery gas generation, battery self-discharge, etc., to reduce battery self-discharge and inhibit performance The effect of attenuation and avoidance of corrosion

Inactive Publication Date: 2017-01-11
POSITEC POWER TOOLS (SUZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, at present, when the battery is being charged, the positive electrode of the battery will be corroded and consumed simply by using a carbon-based conductive agent. This phenomenon, on the one hand, causes the battery to self-discharge, and on the other hand, causes gas to be generated inside the battery, thereby shortening the cycle life of the battery. reduce

Method used

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  • Positive electrode material and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] The positive electrode active material lithium manganate, the conductive polymer poly 3,4-ethylenedioxythiophene-polystyrene sulfonic acid (PEDOT-PSS, Baytron P), the binder CMC and SBR according to the mass ratio LMO:PEDOT- PSS:CMC:SBR=86.5:10:1:2.5 is mixed in water to form a uniform positive electrode slurry. The positive electrode slurry was coated on the positive electrode current collector graphite foil to form an active material layer, which was then pressed into an area of ​​1 cm 2 of discs.

[0095] Zinc foil is used as the negative electrode, and AGM film is used as the diaphragm.

[0096] Weigh a certain mass of zinc sulfate and lithium sulfate, add them to dissolve in water, and configure an electrolyte solution with a concentration of zinc sulfate of 2 mol / L and a concentration of lithium sulfate of 1 mol / L.

[0097] Assemble the positive electrode, negative electrode and separator into a battery cell, put it into the casing, then inject electrolyte, seal...

Embodiment 2

[0099] Mix the positive electrode active material lithium manganate, conductive agent PEDOT-PSS and graphite KS6, binder CMC and SBR in water according to the mass ratio LMO:conductive agent:CMC:SBR=86.5:10:1:2.5 to form a uniform positive electrode Slurry, wherein, the mass ratio of PEDOT-PSS and KS6 is 1:9. The remaining composition and preparation method of the battery are the same as in Example 1.

Embodiment 3

[0101] Mix the positive electrode active material lithium manganate, conductive agent PEDOT-PSS and graphite KS6, binder CMC and SBR in water according to the mass ratio LMO:conductive agent:CMC:SBR=86.5:10:1:2.5 to form a uniform positive electrode Slurry, wherein, the mass ratio of PEDOT-PSS and KS6 is 1:5.

[0102] The remaining composition and preparation method of the battery are the same as in Example 1.

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Abstract

The invention discloses a positive electrode material. The positive electrode material comprises a positive electrode active material and a conductive agent, wherein the positive electrode active material can realize deintercalation-intercalation of first metal ions in a reversible manner; the conductive agent comprises a conductive polymer; the conductive polymer is selected from at least one kind of polyacetylene, polyphenylene sulfide, polyquinoline, poly-phenylene vinylene, poly-p-phenylene, polypyrrole, polyaniline, polythiophene and poly-3, 4-ethylenedioxythiophene-polystyrolsulfon acid; and the conductive agent accounts for 6-15% of the positive electrode material based on mass percentage. The invention also discloses a battery, wherein the battery comprises a positive electrode, a negative electrode and an electrolyte; and the positive electrode comprises the positive electrode material. According to the positive electrode material, the conductive polymer is used as the positive electrode conductive agent; and the conductive polymer has high stability and conductivity, so that the internal resistance of the battery is lowered while the service life of the battery is prolonged.

Description

technical field [0001] The invention belongs to the field of batteries, and in particular relates to a positive electrode material. [0002] The invention also relates to a battery. Background technique [0003] Lead-acid batteries, which have been around for more than a hundred years, have mature battery technology and occupy an absolute market share in energy storage fields such as car starter batteries, electric bicycles, and UPS. Although the lead-acid battery has a low cycle life and a relatively low energy density, it has the advantages of very low price and high cost performance. Therefore, in recent years, nickel-metal hydride batteries, lithium-ion batteries, sodium-sulfur batteries, etc., cannot replace lead-acid batteries in the field of energy storage. [0004] Currently, there is a battery based on internal ion exchange. The working principle of the battery is that the positive electrode is based on the extraction-intercalation reaction of the first metal ion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/12
CPCH01M4/624H01M4/625H01M10/08H01M10/12Y02E60/10Y02P70/50
Inventor 刘洋陈璞
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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