电子元件与材料2016，Vol.35Issue(7)：37-41,5.DOI:10.14106/j.cnki.1001-2028.2016.07.009
Zr添加对V2.1TiNi0.3贮氢合金结构和电化学性能的影响
Effect of zirconium addition on microstructure and electrochemical properties of V2.1TiNi0.3 alloy
摘要
Abstract
V2.1TiNi0.3Zrx(x=0-0.12) hydrogen storage alloys were synthesized by vacuum arc melting method, and the phase structure and electrochemical properties were systematically investigated. The microstructure and XRD analysis show that the V2.1TiNi0.3 alloy consists of V-based solid solution main phases with a bcc structure and TiNi-based secondary phases. The secondary phase of the V2.1TiNi0.3Zrx(x=0.03-0.12) alloy changes into a C14-type Laves phase with hexagonal structure after the Zr element is added, and the main phases remain. The secondary phases of all alloys distribute near the grain boundaries of the main phase in a network structure. In addition, the cell parameters and volumes of the main phase show a increasing tendency with increasing Zr content. According to the electrochemical measurements, not only the activation ability but also the maximum discharge capacity is improved by adding moderate Zr content into the V2.1TiNi0.3 alloy. Moreover, the high-rate dischargeability and the exchange current density of the alloys are both improved. It is found that the alloy electrode of V2.1TiNi0.3Zr0.06 has better comprehensive performance in the investigated alloys.关键词
钒基贮氢电极合金/镍氢电池/Zr添加/显微结构/电化学性能/循环稳定性Key words
V-based hydrogen storage alloy/Ni-MH battery/Zr addition/microstructure/electrochemical property/cycling stability分类
信息技术与安全科学引用本文复制引用
宋茂成,张荣华,张雪峰,赵朝勇,同艳维..Zr添加对V2.1TiNi0.3贮氢合金结构和电化学性能的影响[J].电子元件与材料,2016,35(7):37-41,5.基金项目
四川省科技支撑计划项目(No.2012GZX0089)；四川省重点实验室项目(No. VTZ-2015003) （No.2012GZX0089）
