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High capacity lithium ion battery containing metal conductive substances

A technology of lithium-ion batteries and conductive substances, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as flammability and poor oxidation resistance, and achieve improved safety, long discharge time, and increased capacity and capacity density Effect

Active Publication Date: 2012-10-24
SHIHLIEN APEX HUAIAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But at present the conductive material of the electrode of lithium-ion battery is non-metal conductive material such as conductive carbon black, carbon nanofiber, carbon nanotube or acetylene black, and the resistivity of these conductive materials is 4×10 -6 Ωm-7×10 -6 Ωm, poor oxidation resistance, easy to burn in aerobic environment

Method used

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  • High capacity lithium ion battery containing metal conductive substances
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Examples

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Effect test

Embodiment 1

[0022] Example 1 of the high-capacity lithium-ion battery containing metal-like conductive substances of the present invention uses a winding structure to manufacture a 500 mAh polymer lithium-ion secondary battery with a positive electrode sheet, a negative electrode sheet and a diaphragm, and the battery size: 5.0*303*48mm 3 , the positive electrode active material of the battery is lithium cobaltate, the positive electrode conductor is titanium carbide, the positive electrode binder is polyvinylidene fluoride PVDF, and the ratio of positive electrode components is: the ratio of lithium cobaltate / titanium carbide / polyvinylidene fluoride It is 92.58 parts / 7.92 parts / 1.7 parts (weight ratio). The measured compaction density of titanium carbide is 3.6 times that of conductive carbon black. The conductivity of metal conductive substances is better than that of non-metallic conductive substances. As long as it is replaced with the same volume fraction, when the metal conductive ma...

Embodiment approach 2

[0026] This example is improved on the basis of Example 1. In Example 1, the ratio of lithium cobaltate / titanium carbide / polyvinylidene fluoride 92.58 parts / 7.92 parts / 1.7 parts (weight ratio) is changed to lithium cobaltate / The ratio of titanium carbide / carbon black SUPER P / polyvinylidene fluoride is 92.98 parts / 4.32 parts / 1.0 parts / 1.7 parts (weight ratio), and the rest remain unchanged.

Embodiment approach 3

[0028] This embodiment is improved on the basis of Embodiment 1, and the titanium carbide in Embodiment 1 is changed to titanium nitride carbide, and the rest remain unchanged.

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Abstract

The present invention discloses a high capacity lithium ion battery containing metal conductive substances. The battery comprises a positive electrode sheet, a negative electrode sheet, separation membranes, an electrolyte, a binder and a sealing material. A conductive substance of the positive electrode sheet comprises a metal carbide, a metal boride or a metal nitride. A conductive substance of the negative electrode sheet comprises a metal carbide, a metal boride or a metal nitride. The metal carbide is titanium carbonitride, tungsten carbide or titanium carbide, vanadium carbide, tantalum carbide, or a co-melting body of tungsten carbide and titanium carbide. The metal boride is a molybdenum boride, tungsten boride or vanadium boride. The metal nitride is titanium nitride, tungsten nitride or tantalum nitride. The conductive material of the positive electrode sheet further can contain powder metal, and the conductive material of the negative electrode sheet further can contain powdered metal, wherein the powdered metal is nickel powder, copper powder or chromium powder.

Description

technical field [0001] The invention relates to a battery, in particular to designing a high-capacity lithium-ion battery containing metal-like conductive substances. Background technique [0002] A chemical battery is a device that converts chemical energy directly into electrical energy. The chemical battery mainly includes a casing as a sealing material, an electrolyte solution in the casing, positive and negative electrode sheets immersed in the solution, and wires connecting the electrodes. In a rechargeable chemical battery, it further includes a circuit board for charging operation, and the above-mentioned electrolyte solution, positive and negative electrodes, etc. are collectively referred to as a battery cell. The existing lithium-ion battery is a kind of chemical battery, which is widely used at present. Both the positive electrode sheet and the negative electrode sheet of the lithium ion battery include an active material, a conductive agent, a current collecto...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M4/62
CPCY02E60/122Y02E60/10
Inventor 张潘毅张贵萍
Owner SHIHLIEN APEX HUAIAN TECH CO LTD
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