燕山大学学报2013，Vol.37Issue(1)：75-80,6.DOI:10.3969/j.issn.1007-791X.2013.01.013
Pr元素对La-Nd-Mg-Ni系贮氢合金相结构和电化学性能的影响
Effect of Pr on phase structure and electrochemical properties of La-Nd-Mg-Ni-based hydrogen storage alloys
摘要
Abstract
To investigate effect of rare earths on phase structure and electrochemical properties of La-Nd-Mg-Ni-based hydrogen storage alloys, La0.50Nd0.60-xPrxMg0.20Ni3.20Co0.20al0.20(x=0, 0.10, 0.20, 0.30, 0.40) alloys are prepared by inductive melting.XRD results show that main phases of the alloys are CaCu5-type LaNi5 phase and Ce2Ni7-type La2Ni7 phase.As x increases, the cell volume of the two phases increases and the content of La2Ni7 phase increases.P-C-T profiles show that stability of the hydrides increases with increasing Pr content.Electrochemical tests show that high rate dischargeability, low temperature dischargeability and cycling stability increases first and then decreases with increasing Pr content.The capacity retention rate at the 100th cycle increases from 76.7%(x=0) to 88.7%(x=0.30), and then decreases to 82.3%(x=0.40).关键词
镍-金属氢化物电池/贮氢合金/La-Nd-Mg-Ni系合金/相结构/电化学性能Key words
nickel-metal hydride batteries/ hydrogen storage alloys/ La-Nd-Mg-Ni-based alloys/ phase structure/ electrochemical properties分类
信息技术与安全科学引用本文复制引用
李媛,杨淑琴,王建青,李中秋,韩树民..Pr元素对La-Nd-Mg-Ni系贮氢合金相结构和电化学性能的影响[J].燕山大学学报,2013,37(1):75-80,6.基金项目
国家自然科学基金资助项目(51171165) （51171165）
河北省自然科学基金资助项目(B2012203027,B2012203104) （B2012203027,B2012203104）
秦皇岛科技支撑计划资助项目(2012021A068) （2012021A068）
