| 热处理对低Co贮氢合金Ml(NiCoMnAlFe)_5电化学性能的影响 |
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| 引用本文： | 马志鸿,陈立新,顾巍,雷永泉.热处理对低Co贮氢合金Ml(NiCoMnAlFe)_5电化学性能的影响[J].中国有色金属学报,2000(Z1). |
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| 作者姓名： | 马志鸿 陈立新 顾巍 雷永泉 |
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| 作者单位： | 浙江大学材料科学与工程系!杭州310027 |
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| 基金项目： | 国家“八六三”计划资助项目!( 71 5 0 0 4 0 0 60 ) |
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| 摘 要： | 系统研究了热处理对低Co贮氢电极合金Ml(NiCoMnAlFe) 5 电化学性能的影响。结果表明 ,铸态合金的放电容量为 2 97mA·h/g ,经 2 68次充放电循环后的容量保持率为 68% ;经热处理后 ,合金的放电容量提高至30 2mA·h/g ,2 68次充放电循环后的容量保持率提高至 80 % ,热处理提高了合金的放电容量和循环稳定性 ;同时发现热处理会导致合金高倍率放电特性的恶化。XRD测试表明 ,热处理降低了晶格应力与晶格缺陷 ,改善了合金的成分均匀性 ,从而提高了合金的放电容量和循环稳定性。
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| 关 键 词： | 热处理 低Co贮氢合金 晶体结构 电化学性能 |
Effects of heat treatment on electrochemical properties of low-Co contained Ml(NiCoMnAlFe)_5 hydrogen storage alloy |
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| MA Zhi hong,CHEN Li xin,GU Wei,LEI Yong quan.Effects of heat treatment on electrochemical properties of low-Co contained Ml(NiCoMnAlFe)_5 hydrogen storage alloy[J].The Chinese Journal of Nonferrous Metals,2000(Z1). |
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| Authors: | MA Zhi hong CHEN Li xin GU Wei LEI Yong quan |
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| Abstract: | Effects of heat treatment on the electrochemical properties of low Co contained Ml(NiCoMnAlFe) 5 hydride electrodes were investigated. The results of electrochemical measurement show that the discharge capacity and electrochemical cycling stability of hydride electrodes are improved after heat treatment, meanwhile heat treatment results in the deterioration of high rate dischargeability (HRD) of hydride electrodes. The results of XRD show that because heat treatment enhances the compositional homogeneity, and reduces the lattice strain and defects of the as cast alloy, the electrochemical properties of hydride electrodes are improved. |
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| Keywords: | heat treatment low Co contained hydrogen storage alloy crystal structure electrochemical properties |
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