Quinary icosahedral quasicrystalline Ti-V-Ni-Mn-Cr alloy: A novel anode material for Ni-MH rechargeable batteries

被引：13

作者：

Hu, Wen ^{[1
,2
]}

Wang, Lidong ^{[1
]}

Wang, Limin ^{[1
]}

机构：

[1] CAS, Changchun Inst Appl Chem, State Key Lab Rare Earth Resources Utilizat, Changchun 130022, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

MATERIALS LETTERS | 2011年 / 65卷 / 19-20期

基金：

中国国家自然科学基金;

关键词：

Ti-V-Ni-Mn-Cr alloy; Icosahedral quasicrystalline phase; Electrochemical hydrogen storage; Electrocatalytic activity; HYDROGEN STORAGE ALLOYS; ELECTROCHEMICAL PROPERTIES; PHASE-FORMATION; ZR; APPROXIMANTS; SYMMETRY;

D O I：

10.1016/j.matlet.2011.06.059

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The substitution of manganese and chromium for 6 at.% nickel in Ti(1.6)V(0.4)Ni leads the rapid quenching synthesis of quinary icosahedral phase (i-phase) evidenced by the observations of 2-. 3- and 5-fold symmetries. As negative electrode in Ni-MH battery, the quinary Ti-V-Ni-Mn-Cr i-phase can deliver a maximum discharge capacity of 278 mAh g(-1) at 30 mA g(-1) larger than that of Ti(1.6)V(0.4)Ni master alloy anode owing to Mn and/or Cr doping. After a preliminary test of 30 consecutive cycles the cycling capacity retention rate (CR%) is 80%. The strong chemisorption of hydrogen shown in cyclic voltammetric (CV) response indicates that the electrocatalytic activity improvement for the i-phase negative electrode is highly demanded. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：2868 / 2871

页数：4

共 22 条

[21] A NEW ICOSAHEDRAL PHASE WITH M35 SYMMETRY [J].