Electrochemical performances of hydrogen storage alloys treated using a new milling technique
来源期刊：Rare Metals2008年第3期
论文作者：LIU Kaiyu~(a,b) ZHANG Ying~(a,b) ZHANG Wei~c HE Yuehui~b ~a School of Chemistry and Chemical Engineering,Central South University,Changsha ,China ~b State Key Laboratory of Powder Metallurgy,Central South University,Changsha ,China ~c No. Research Institute,China Shipbuilding Industry Co.,Wuhan ,China
文章页码：273 - 277
摘 要：<正>A new self-made additive of amidocyanogen-acetic salt was used in wet ball-grind technique（WBGT）for preparing hydrogen storage alloys, and the effect on the electrochemical performance of the alloy electrode was investigated in detail.It was found that the prepared electrode had perfect electrochemical performances,such as rapid activation,high capability,high-rate discharge（HRD）ability,and good stability.The first discharge capacitance at 0.2 C（throughout this study,n C rate means that the rated capacity of a hydrogen storage alloy（full capacity）is charged or discharged completely in 1/n h）reached 278 mAh·g-1and the discharge capacitance reached the maximum of 322 mAh·g-1only after two charge-discharge cycles.For the dry method,wet method,and WBGT,the high rate discharge（HRD）values(C5C/C0.2Cratio)were approximately 0.59,0.76,and 0.83,respectively.The stable discharge capacity at 3 C increased from 275 mAh·g-1（dry method）to 295 mAh·g-1（WBGT）.
摘要：<正>A new self-made additive of amidocyanogen-acetic salt was used in wet ball-grind technique（WBGT）for preparing hydrogen storage alloys, and the effect on the electrochemical performance of the alloy electrode was investigated in detail.It was found that the prepared electrode had perfect electrochemical performances,such as rapid activation,high capability,high-rate discharge（HRD）ability,and good stability.The first discharge capacitance at 0.2 C（throughout this study,n C rate means that the rated capacity of a hydrogen storage alloy（full capacity）is charged or discharged completely in 1/n h）reached 278 mAh·g-1and the discharge capacitance reached the maximum of 322 mAh·g-1only after two charge-discharge cycles.For the dry method,wet method,and WBGT,the high rate discharge（HRD）values(C5C/C0.2Cratio)were approximately 0.59,0.76,and 0.83,respectively.The stable discharge capacity at 3 C increased from 275 mAh·g-1（dry method）to 295 mAh·g-1（WBGT）.
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