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
收藏
页码：2868 / 2871
页数：4
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