广西科学2012，Vol.19Issue(2)：134-138,5.
La0.7Zr0.1Mg0.2Ni3.4-xCoxFe0.1合金的制备与电化学性能研究
Preparation and Electrochemical Properties of La0.7Zr0.1Mg0.2 Ni3.4-xCoxFe0.1 Alloy
摘要
Abstract
Abstract:La0.7Zr0.1Mg0.2Ni3.4-x CoxFe0.1 ( x =0. 15,0. 25,0. 35,0. 45) alloys were prepared by electromagnetic induction melting under Ar atmosphere. The results showed that the alloys were mainly composed of LaNi5, LaNi2 and La2 MgNi9 phases. The electrochemical measurements showed that the maximum discharge capacity of the alloy electrodes were 346. 7mAh/g( x =0.15) ,320. 3mAh/g( x =0. 25) ,363. 0mAh/g( x =0. 35) and 313. 3mAh/g( x =0. 45), respectively. The cyclic capacity retention rate C65/Cmax of alloy electrodes first increased to 80. 2%{x =0.35) from 63. 0%( x =0. 15),and then decreased to 75. 0%( x =0. 45). For La0.7 Zr0.1Mg0.2Ni3.15Co0.25Fe0.1 alloy,the high rate dischargeability was 67. 3% and the limiting current density was 386. 8mA/g. These results indicated that the electrochemical kinetics and performance of La0.7Zr0. 1Mg0.2Ni3.15Co0.25Fe0.1 alloy were better among La0.7Zr0.1Mg0.2Ni3.4-x Cox Fe0.1 ( x =0.15,0. 25,0. 35,0. 45) alloys.关键词
储氢合金/储氢性能/电化学性能Key words
Hydrogen storage alloy/ Hydrogen storage property/electrochemical performance分类
矿业与冶金引用本文复制引用
蓝志强,闫文宁,覃昌生,卢照,蒋津辉,郭进..La0.7Zr0.1Mg0.2Ni3.4-xCoxFe0.1合金的制备与电化学性能研究[J].广西科学,2012,19(2):134-138,5.基金项目
国家自然科学基金项目(50861003.51071054),广西自然科学基金重点项目(2010GXNSFD013004),广西大学科研基金项目(XJZ100266)资助. （50861003.51071054）
