Phase structure and electrochemical properties of La0.7Ce0.3Ni3.75Mn0.35Al0.15Cu0.75-xFex hydrogen storage alloys
La0.7Ce0.3Ni3.75Mn0.35Al0.15Cu0.75-xFex (x =0-0.20) hydrogen storage alloys are synthesized by induction melting and subsequent annealing treatment,and phase structure and electrochemical characteristics are investigated.All alloys consist of a single LaNi5 phase with CaCu5 structure,and the lattice constant a and the cell volume V of the LaNi5 phase increases with increasing x value.Maximum discharge capacity gradually decreases from 319.0 mAh/g (x =0) to 291.9rnAh/g (x =0.20) with the increase of x value.High-rate dischargeability at the discharge current density of 1200 mA/g decreases monotonically from 53.1% (x =0.00) to 44.2% (x =0.20).Cycling stability increases with increasing x from 0 to 0.20,which is mainly ascribed to the improvement of the pulverization resistance of the alloy electrodes.
Hydrogen storage alloy phase structures electrochemical property kinetics Ni-MH battery
Liu Baozhong Li Anming Fan Yanping Hu Mengjuan Zhang Baoqing
School of Materials Science & Engineering, Henan Polytechnic University, Jiaozuo 454000, China; Stat School of Materials Science & Engineering, Henan Polytechnic University, Jiaozuo 454000, China
国际会议
上海
英文
118-118
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）