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OALib Journal期刊
ISSN: 2333-9721
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Co-B合金粉体的制备和电化学行为
DOI: DOI:10.3724/SP.J.1037.2009.00386, PP. 346-351
Keywords: Co-B合金,非晶粉体,化学还原,电化学性能
Abstract:
通过NaBH4还原CoSO4溶液制备了Co0.68B0.32,Co0.55B0.45和Co0.50B0.50一系列超细非晶态Co-B合金粉体.电化学测试表明,在300mA/g的高电流密度下,3种合金电极的首次放电容量分别高达510.6,666.4和667.2mA?h/g,经60次循环后,放电容量仍分别有331.6,379.5和390.5mA?h/g.3种合金电极还表现出良好的高率放电性能,在1200mA/g的放电电流密度下,放电容量分别为336.2,373.4和390.1mA?h/g.较高的B含量有助于提高合金的电化学性能,这是因为B的氧化溶解能提高合金电极的实际电化学反应面积.
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