Cobalt-free nickel-metal hydride battery for industrial applications

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• 作者：Tomoaki Takasaki ; Kazuya Nishimura ; Makoto Saito ; Hiroshi Fukunaga ; Tsutomu Iwaki ; Tetsuo Sakai
• 关键词：Nickel&ndash ; metal hydride battery ; Cobalt-free ; Industrial application
• 刊名：Journal of Alloys and Compounds
• 出版年：2013
• 出版时间：15 December, 2013
• 年：2013
• 卷：580
• 期：supp_S1
• 页码：S378-S381
• 全文大小：1110 K

文摘

A cobalt-free (Co-free) RE_0.9Mg_0.1Ni_3.9Al_0.2 alloy (RE: rare earth) was prepared for use in a nickel-metal hydride (Ni-MH) battery. The use of the alloy as the negative electrode of the Ni-MH battery effectively improved the high-rate discharge and suppressed the self-discharge compared to the conventional AB₅-type alloy. Moreover, carbon-coated Ni(OH)₂ has been developed to produce a Co-free Ni-MH battery. This material exhibits a capacity retention comparable to that of the conventional CoOOH-coated Ni(OH)₂. A 205 A h Co-free Ni-MH battery cell was constructed using the Co-free materials, and this cell exhibited a good high-rate discharge performance.