Low self-discharge ferrous electrode material

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...

AI Technical Summary

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 charged iron electrode is left at 20°C for 28 days, the self-discharge rate of the electrode is lower than 20%, and it has low cost. Advantages of very low and no heavy metal pollution

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