Low self-discharge ferrous electrode material

A technology of iron electrode and carbonyl iron powder, applied in the field of low self-discharge iron electrode materials, can solve the problems of large self-discharge and low self-discharge rate of iron electrodes

Active Publication Date: 2010-02-17
宝生集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of large self-discharge of iron electrodes, and provide a low-self-discharge iron electrode material. After the ch

Method used

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  • Low self-discharge ferrous electrode material

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Embodiment

[0008] Embodiment: the chemical composition of high-capacity iron electrode material of the present invention is:

[0009] Fe prepared as above 3 o 4 The content is 82-90%, In 2 o 3 The content of SnO is 0.05-0.07%, the content of SnO is 3-5%, the content of Bi 2 o 3 The content of graphite powder is 2-4%, and the content of graphite powder is 6-8%.

[0010] The preparation method of iron electrode is: (1) take a certain amount of Fe 3 o 4 , by Fe 3 o 4 The amount of adding 0.05-0.07% In2O3, 3-5% SnO, 2-4% Bi 2 o 3 . 7-8% graphite powder. (2) Add a certain amount of PVA binder with a concentration of 5-10%, and after stirring evenly, apply the slurry on the negative electrode current collector (the current collector is one of nickel foam, iron foam or steel strip) . (3) After the electrode is dried, the electrode is pressed into shape with a pressure of 24 MPa on a hydraulic press.

[0011] Charge-discharge test of the iron electrode: the iron electrode prepared...

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Abstract

The invention provides a low self-discharge ferrous electrode material. The ferrous electrode material is characterized by consisting of an active substance and an additive, wherein the composition ofthe active substance is ferrum or ferrous compounds including one or more of Fe3O4, Fe(OH)2, Fe(OH)3, Fe2O3, reduced ferrous powder and carbonyl ferrous powder; and the additive comprises: 1) 0.02 to0.15 percent of indium or indium compounds including one or more of In, In2O3, In2(SO4)3, In(OH)3, InCl3 and the like; 2) 2 to 8 percent of stannum or stannum compounds including one or more of Sn, SnO, SnO2, SnCl2, SnCl4 and stannate; 3) 1 to 7 percent of bismuth or bismuth compounds including one or more Bi, Bi2O3, Bi(NO3)3 and the like; and 4) 5 to 10 percent of graphite powder. The ferrous electrode material has the advantages that: 1) no toxic heavy metals (such as Hg, Cd, Pb and the like) are added, so the electrode material is an environment-friendly electrode material 2) the cost foran electrode is quite low; and 3) the self-discharge rate of the electrode is less than 20 percent at a temperature of 20 DEG C after 28 days. The material is used for manufacturing environment-friendly ferrum-nickel storage batteries.

Description

technical field [0001] The invention relates to an iron electrode material, in particular to an iron electrode material with low self-discharge. The electrode material is used for manufacturing an environment-friendly iron-nickel battery. Background technique [0002] The iron-nickel battery was invented by Edison in 1900. Between 1910 and 1960, iron-nickel batteries were widely used in traction locomotives as power sources. However, after 1960, people's research on iron-nickel batteries has decreased, mainly because nickel-cadmium batteries have better performance than nickel-iron batteries. With the continuous progress of society, people's requirements for environmental protection are getting higher and higher. The original heavy metal-polluted nickel-cadmium batteries and lead-acid batteries will be replaced by environmentally friendly batteries. Iron-nickel batteries just meet this requirement. . [0003] The iron-nickel battery is a green and environmentally friendly...

Claims

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Application Information

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IPC IPC(8): H01M4/24H01M4/62
CPCY02E60/124H01M4/248H01M4/62H01M4/364H01M10/24Y02E60/10
Inventor 陶明大何秀能潘唯
Owner 宝生集团有限公司
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