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Negative active material of electrical equipment

A technology of negative electrode active materials and electrical equipment, applied in the direction of electrical components, battery electrodes, circuits, etc., can solve problems such as loss of activity, material cracking, and degradation of material cycle performance, to overcome poor safety, enhance stability, and overcome cycle poor sex effect

Inactive Publication Date: 2017-11-03
TIANJIN CUITONG IND TRADE
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Problems solved by technology

However, simple metals cannot be directly used as negative electrode materials for lithium-ion batteries. The main reason is that they have a large volume expansion and contraction in the process of reacting with lithium ions to form lithium-metal alloys, which will lead to material Cracked by internal stress, thus losing activity
Ultimately, the cycle performance of the material is reduced

Method used

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specific Embodiment 1

[0012] A negative electrode material for electrical equipment, which has an alloy LiAlSiTi, LixAl alloy, AlySi alloy, and Ti powder according to the stoichiometric ratio, wherein the element ratio is: lithium is 80%, aluminum is 10%, silicon is 10%, titanium is 5% and A certain amount of steel balls (ball-to-material ratio 5:1) were put into a high-energy ball mill, and ball milled for 18 hours at a speed of 800 r / s under an argon atmosphere. Then the ball-milled metal powder is pressed into sheets, put into a tube furnace, and calcined at 600°C for 10h under an argon atmosphere, with a heating rate of 20°C / min. The gray block was obtained, which was pulverized and passed through a 400-mesh sieve to obtain the final product, that is, LiAlSiTi alloy powder, which is the negative electrode material for electrical equipment.

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Abstract

The invention discloses a negative active material of electrical equipment, and belongs to the field of electrical materials. The negative material is of alloy LiAlSiTi, wherein the element matching is as follows: the weight percentage of lithium is 10% to 70%, the weight percentage of aluminum is 10% to 25%, the weight percentage of silicon is 10% to 15%, and the weigh percentage of titanium is 5% to 10%. The alloy LiAlSiTi is dispersed into polyaniline. The negative active material overcomes the disadvantages of low safety and low cyclicity caused by high activity of lithium negative electrode materials, and is of high stability; the alloy material is dispersed into polyaniline, the stability is strengthened, and simultaneously the negative active material has good electrical conduction and is of a practical effect.

Description

technical field [0001] The invention relates to the field of electrical materials, in particular to a negative electrode active material for electrical equipment. Background technique [0002] In recent years, in order to cope with air pollution and global warming, the reduction of the amount of carbon dioxide has been strongly desired. In the automotive industry, the reduction of carbon dioxide emissions due to the introduction of electric vehicles (EV) and hybrid electric vehicles (HEV) is expected, and electrical equipment such as secondary batteries for driving engines is the key to grasping their practical use development is prevalent. [0003] Lithium-ion batteries using graphite materials as the negative electrode and transition metal oxides such as LiCoO2 as the positive electrode material have been widely used. Many high-tech electronic products, such as notebook computers, MP3, MP4, etc., are inseparable from lithium-ion batteries. However, the application of li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M10/0525
CPCH01M4/382H01M10/0525Y02E60/10
Inventor 孙长利
Owner TIANJIN CUITONG IND TRADE
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