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Cathode of li-fes 2 battery and battery composed of same

An iron disulfide battery, cathode technology, applied in battery electrodes, lithium batteries, electrode carriers/current collectors, etc., can solve the problems of increasing battery volume, inappropriate application fields, etc., to increase effective specific gravity, excellent rate discharge and High energy density performance, effect of increasing dressing volume

Inactive Publication Date: 2017-06-13
GUANGZHOU GREAT POWER ENERGY & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current existing technology, the lithium iron disulfide battery basically increases the battery reaction interface by increasing the positive and negative plates of the battery, so as to achieve a higher rate of discharge, but this method often increases the volume of the battery , not suitable for every field of application

Method used

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  • Cathode of li-fes 2 battery and battery composed of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A lithium iron disulfide battery includes a positive electrode, a negative electrode (metal lithium), a diaphragm, and an electrolyte. The positive electrode includes a positive electrode current collector and a positive electrode slurry layer coated on both sides of the positive electrode current collector. The positive electrode slurry is composed of the following components calculated by mass percentage: 95 wt% iron disulfide, 1 wt% binder, Conductive agent 3 wt%, silicon dioxide 1 wt%.

[0025] The binder is a mixture of polytetrafluoroethylene and polyvinylidene fluoride, and the ratio of polytetrafluoroethylene to polyvinylidene fluoride is 1:3.

[0026] The conductive agent is a mixture of acetylene black and conductive graphite, and the ratio of the amount of acetylene black to conductive graphite is 1:4.

[0027] The preparation method of the lithium iron disulfide battery comprises the following steps of preparation:

[0028] S1. Prepare the positive electro...

Embodiment 2

[0031] Different from Example 1, in this example, the areal density of the positive electrode slurry layer is 0.079g / cm 2 , the other components and preparation steps of the lithium iron disulfide battery are the same as in Example 1.

Embodiment 3

[0033] Different from Example 1, in this example, the areal density of the positive electrode slurry layer is 0.100g / cm 2 , the other components and preparation steps of the lithium iron disulfide battery are the same as in Example 1.

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Abstract

The invention provides a cathode of a li-fes 2 battery and the battery composed of the same. The cathode comprises a cathode current collector and cathode slurry layers applied to the two faces of the cathode current collector; the surface density of the cathode slurry layers is 0.070-0.100 g / cm<2>, and cathode slurry is prepared from a cathode active material, an adhesive, a conductive agent and silica, wherein the cathode active material is iron disulfide. According to the cathode, by adopting the cathode slurry layers with the surface density of 0.070-0.100 g / cm<2>, the cathode slurry application amount per unit area is increased, the using size of other materials (such as a diaphragm and the current collector) in a battery cell is decreased, then the effective ratio of the cathode to an anode in the battery is increased, therefore, the energy density is increased, and the rate discharge performance is improved.

Description

technical field [0001] The invention relates to the field of lithium iron disulfide, and more specifically, to a positive electrode of a lithium iron disulfide battery and a battery composed of the same. Background technique [0002] Lithium iron disulfide batteries use iron disulfide as the positive electrode active material and metal lithium as the battery negative electrode. It has the advantages of high specific energy, long storage time, excellent rate performance and low temperature performance. It is mainly suitable for camera flashes, electric toothbrushes, Electric shavers, MP3 players, hearing aids, various medical appliances, military communication appliances, etc. At present, in the existing technology, the lithium iron disulfide battery basically increases the battery reaction interface by increasing the positive and negative plates of the battery, so as to achieve a higher discharge rate, but this method often increases the volume of the battery , are not suit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/58H01M4/525H01M4/38H01M10/052
CPCH01M4/382H01M4/525H01M4/5815H01M4/665H01M4/667H01M10/052Y02E60/10
Inventor 薛建军刘治华
Owner GUANGZHOU GREAT POWER ENERGY & TECH CO LTD
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