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Electrode material and lithium ion battery with same

A technology of electrode materials and electrode active materials, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, battery electrodes, etc., can solve problems affecting battery performance, high cost, serious gas inflation, etc., to improve safety performance and quality assurance , high discharge capacity for the first time, and the effect of solving the problem of inflation

Inactive Publication Date: 2010-12-01
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The electrolyte is an important part of the battery, but the electrolyte in the prior art is easy to react with water. If the process and environment are not strictly controlled, the prepared battery is easy to swell during the formation or cycle process, and the problem of gas bloating occurs. May explode and seriously affect the performance of the battery
In order to solve this problem, the existing technology strictly controls the moisture in the battery by controlling the production environment or production process, but this method is not only complicated in process, but also requires special equipment and high cost
The existing technology also controls the thickness of the battery by extruding the gas during sealing after formation. However, these methods may be able to improve the expansion problem of the battery during the formation stage, but still cannot solve the gas swelling of the battery during the cycle of use. problem, still can not guarantee the quality of the product
Especially for the existing batteries containing lithium titanate anode materials, which are research hotspots and have advanced technology, the problem of gas swelling is serious, and it is even impossible to produce qualified products

Method used

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  • Electrode material and lithium ion battery with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Ingredients of electrode materials

[0017] LiFePO 4 , acetylene black, PVDF, and PVP are dosed according to a weight ratio of 100:5:6:0.5 to obtain a positive electrode slurry; lithium titanate (LiTi 5 o 12 ), acetylene black, PVDF, PVP, NaNi 5 According to the weight ratio of 100:1:7:0.5:3, the negative electrode slurry is obtained.

[0018] (2) Preparation of pole piece

[0019] Use a pulper to pull one side first, dry it at 100 degrees simultaneously, and then pull the other side, and dry it at 100 degrees simultaneously. The dressing area of ​​the positive electrode is 470*43mm, and the dressing area of ​​the negative electrode is 490*44mm. The capacity ratio of positive and negative electrodes is 1:1.1. Then press the tablet so that the thickness of the positive side is 118 microns, the dressing amount is 5.28g, and the bulk density is 2.2g / cm 3 . The thickness of the negative electrode side is 91 microns, the dressing amount is 2.16g, and the bulk den...

Embodiment 2

[0023] Electrode materials, pole pieces and batteries are prepared in the same manner as in Example 1, except that the negative electrode slurry is made of lithium titanate (LiTi 5 o 12 ), acetylene black, PVDF, PVP, V-Ti according to the 100:1:7:0.5:3 ingredients prepared.

Embodiment 3

[0025] Electrode materials, pole pieces and batteries are prepared in the same manner as in Example 1, except that the negative electrode slurry is made of lithium titanate (LiTi 5 o 12 ), acetylene black, PVDF, PVP, ZrCr 2 Prepared according to the ingredients of 100:1:7:0.5:3.

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Abstract

The invention provides an electrode material, which comprises an electrode active material, binder and metal hydride, can well solve the swollen problem of the lithium ion battery, in particular the swollen problem of the lithium ion battery containing lithium titanate, hard carbon, soft carbon and other easy-absorbent anode active materials, can well control the quality of the battery in a use process, and improve the quality and safe performance of the lithium ion battery. The invention also provides the lithium ion battery containing the electrode material, and has excellent circulating performance and higher first discharge capacity.

Description

【Technical field】 [0001] The invention relates to an electrode material and a lithium ion battery containing the electrode material. 【Background technique】 [0002] Due to the advantages of high working voltage, long cycle life, no memory effect, small self-discharge, and no environmental pollution, lithium-ion batteries have been more and more widely used, and the requirements for their performance are also getting higher and higher. [0003] The electrolyte is an important part of the battery, but the electrolyte in the prior art is easy to react with water. If the process and environment are not strictly controlled, the prepared battery is easy to swell during the formation or cycle process, and the problem of gas bloating occurs. An explosion may occur, seriously affecting the performance of the battery. In order to solve this problem, in the prior art, the moisture in the battery is strictly controlled by controlling the production environment or production process, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/62H01M10/36H01M10/40
CPCY02E60/122H01M10/0525H01M4/62H01M10/058H01M4/131Y02E60/10Y02P70/50H01M4/13H01M4/46H01M4/485
Inventor 屈丽辉江文锋刘彦初夏玉潘福中
Owner BYD CO LTD
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