摘要
研究了热处理时间对贮氢电极合金La0.7Mg0.3Ni2.45Co0.75Mn0.1Al0.2的微结构与电化学性能的影响。XRD分析结果表明,所有合金均由(La,Mg)Ni3与LaNi5两相构成,热处理并没有使该贮氢合金发生相变。电化学研究结果表明,随着热处理时间的延长,合金电极的最大放电容量与循环稳定性能均得到明显改善,而高倍率放电性能却逐渐恶化。
The effects of the dwelling time of annealing treatment on the microstructures and the electrochemical properties of the La0. 7 Mg0. 3 Ni2. 45 Co0. 75 Mn0. 1 Al0. 2 hydrogen storage alloy were studied systematically. The results of XRD showed that all of the alloys consisted mainly of two phases： the （La, Mg） Ni3 phase and the LaNi5 phase. Electrochemical studies showed that the maximum discharge capacity and the cyclic stability increased and the high rate dischargeability （HRD） of the alloy electrode decreased with increasing annealing time.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第B06期310-311,共2页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家自然科学基金资助项目(50471040)
关键词
贮氢合金
热处理
电化学性能
hydrogen storage alloys
annealing treatment
electrochemical properties
