电源技术2018，Vol.42Issue(4)：513-516,4.
稀土基合金对CoB宽温区电化学性能的影响
Effects of rare earth alloys on electrochemical properties of CoB alloy in wide temperature range
摘要
Abstract
As one of the most promising candidates in alkaline secondary batteries,CoB amorphous alloy has high reversible discharge capacity,but it exhibits poor properties at low or high temperature,which needs urgent improvement for practical application.The rare earth-based La0.7Mg0.3Ni3.5 alloy (represented as LaMgNi) was prepared via induction melting and CoB amorphous alloy (represented as CoB) was synthesized via chemical reduction method.CoB-LaMgNi composite alloy was obtained by ball milling process.The effects of rare earth alloys on electrochemical properties of CoB alloy in wide temperature range were studied.The phase structure and surface morphology were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM).Moreover,the electrochemical performance was characterized by charge-discharge test,potentiostatic step discharge,high-rate discharge ability (HRD),electrochemical impedance spectroscopy (EIS),linear polarization (LP) and anodic polarization (AP).The experimental results show that the electrochemical properties at wide temperature range are remarkably improved after the addition of LaMgNi alloy.关键词
储氢合金/放电容量/电化学性能/高温性能/低温性能Key words
hydrogen storage alloy/discharge capacity/electrochemical properties/high-temperature property/low-temperature property分类
信息技术与安全科学引用本文复制引用
沈绯红,庞锐,黄建灵,褚海亮,邱树君..稀土基合金对CoB宽温区电化学性能的影响[J].电源技术,2018,42(4):513-516,4.基金项目
国家自然科学基金(51361006,51401059,51461010) （51361006,51401059,51461010）
全国大学生创新创业训练项目(201510595059) （201510595059）
