Secondary zinc electrode additive and its preparing method

An additive and electrode technology, which is applied in the field of secondary zinc electrode additives and its preparation, can solve the problems of reducing the utilization rate and conductivity of the active material of the zinc negative electrode, the improvement effect of the cycle life is not large, and the modification effect is not lasting, etc. Improve comprehensive electrochemical performance, reduce internal resistance and prevent dissolution
CN100349313CInactive Publication Date: 2007-11-14ZHEJIANG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV OF TECH
Publication Date
2007-11-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

Primary chemical composition of the additive is Re and C, where Re is as ZnO or SnO2 or their admixture; C is as graphite. The additive also can be conducting oxides including Sb2O3, Bi2O3, Al2O3, SiO2 etc. Each oxide and graphite are mixed and sintered to form a certain shape. Advantages are: (1) the additive can be as center of crystallization; increasing use ratio of active material and discharge capacity, and reducing and preventing generation of tree like crystal of zinc, and raising cycle life of electrode; (2) reducing internal resistance of electrode as well as preventing zinc from solved in electrolyte, and hydrogen from separating out. The invention possesses favorable effect for improving synthetical electrochemical performance of secondary zinc electrode.
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Description

(1) Technical field

[0001] The invention relates to a secondary zinc electrode additive and a preparation method thereof. (2) Background technology

[0002] In recent years, with the rapid development of electronics, communication and IT industries, various portable electronic products such as notebook computers, various communication equipment, cordless phones, MP3, digital cameras, electric tools and other products have developed rapidly. The demand for secondary batteries is very strong, and the performance of batteries is also getting higher and higher. Therefore, the development of secondary batteries with high specific energy density, small size, long life, high current discharge, no pollution to the environment, and low price Chemical power supply is very urgent.

[0003] Zinc electrode has excellent electrochemical performance, and its theoretical specific capacity can reach 820mAh / g. It is an excellent electrode material, high-performance secondary zinc electrode, ...

Claims

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