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保壓時(shí)間對(duì)儲(chǔ)氫合金電極電化學(xué)性能的影響
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內(nèi)蒙古自治區(qū)自然科學(xué)基金 (2010MS0804)；內(nèi)蒙古師范大學(xué)科研基金 (ZRYB09007)


Effects of the Pressure-Holding Time on the Electrochemical Properties of Mm0.3Ml0.7Ni3.55Co0.75Mn0.4Al0.3 Metal Hydride Electrodes
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    摘要:

    在不同保壓時(shí)間下制備Mm0.3Ml0.7Ni3.55Co0.75Mn0.4Al0.3儲(chǔ)氫合金電極，研究保壓時(shí)間對(duì)合金電極的活化性能、最大放電容量、放電特性和循環(huán)穩(wěn)定性的影響規(guī)律和機(jī)制。結(jié)果表明，保壓時(shí)間對(duì)合金電極的活化性能基本無(wú)影響。合金電極的其它電化學(xué)性能隨保壓時(shí)間的增加均呈現(xiàn)出先變好后變壞的變化規(guī)律，保壓時(shí)間為15 min時(shí)，合金展示了最佳的綜合電化學(xué)性能，電化學(xué)性能的改善主要?dú)w因于合金電極的電荷轉(zhuǎn)移速度加速和內(nèi)阻減小

    Abstract:

    The Mm0.3Ml0.7Ni3.55Co0.75Mn0.4Al0.3 metal hydride electrodes were prepared at pressure-holding time of t (t=10, 15, 20 and 25 min). The effects of the pressure-holding time on the activation performance, maximum discharge capacity, discharge potential characteristic and cycle stability of the electrode were investigated. The mechanism of the effect of the pressure-holding time on the electrochemical properties of metal hydride electrodes was also discussed in detail. The results show that the pressure-holding time has no effect on the activation performance of the electrode basically, and the other electrochemical properties of the electrodes are improved firstly and then degenerated with increasing of pressure-holding time. The electrode at pressure-holding time of 15 min exhibits the best electrochemical properties. The improvements of the electrochemical properties are attributed to the increase of the charge-transfer reaction rate on the alloy and the decrease of the internal resistance of the electrodes

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田 曉,劉向東,姚占全,海 山.保壓時(shí)間對(duì)儲(chǔ)氫合金電極電化學(xué)性能的影響[J].稀有金屬材料與工程,2012,41(4):677~680.[Tian Xiao, Liu Xiangdong, Yao Zhanquan, Hai Shan. Effects of the Pressure-Holding Time on the Electrochemical Properties of Mm0.3Ml0.7Ni3.55Co0.75Mn0.4Al0.3 Metal Hydride Electrodes[J]. Rare Metal Materials and Engineering,2012,41(4):677~680.]
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  • 收稿日期:2011-05-08
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