Reserch and Development of Mg-Based Hydrogen Storage Alloys for Intended Use in Nickel-Metal Hydride Batteries

DOI Web Site Web Site 参考文献54件 オープンアクセス
  • IWAKURA Chiaki
    Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University
  • INOUE Hiroshi
    Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University
  • FURUKAWA Naoji
    Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University
  • NOHARA Shinji
    Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University

書誌事項

タイトル別名
  • Research and Development of Mg-Based Hydrogen Storage Alloys for Intended Use in Nickel-Metal Hydride Batteries
公開日
2003-09-05
DOI
  • 10.5796/electrochemistry.71.776
公開者
公益社団法人　電気化学会

この論文をさがす

説明

<p>The physicochemical and electrochemical characteristics of Mg-based hydrogen storage alloys modified by various methods are discussed for intended use in nickel-metal hydride batteries. A Mg2Ni-Ni composite prepared by ball-milling of Mg2Ni alloy with Ni (Mg2Ni/Ni=1/1.28 in mole ratio) has a homogeneous amorphous structure and exhibits much improved hydriding-dehydriding characteristics and a very high discharge capacity at room temperature. Surface modification of amorphous MgNi alloys by ball-milling with graphite led to an improvement in the hydriding-dehydriding and charge-discharge characteristics. It is suggested that both a charge-transfer reaction between graphite and Mg and an increase in the Ni/Mg ratio on the alloy surface may be responsible for the enhanced characteristics of the MgNi-graphite composite. By using carbon materials with lower crystallinity for the surface modification, the ball-milling time to reach a maximum discharge capacity was shortened. Moreover, it was found that the combination of partial substitution with Ti and V and the subsequent surface modification with graphite promoted hydrogen desorbability and improved charge-discharge cycle performance and high rate dischargeability. The combination of bulk and surface modifications is very effective in improving the physicochemical and electrochemical characteristics of Mg-based alloys.</p>

収録刊行物

  • Electrochemistry

    Electrochemistry 71 (9), 776-782, 2003-09-05

    公益社団法人　電気化学会

参考文献 (54)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ