最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級檢索
La0．67Mg0．33Ni2．5Co0．5貯氫合金的制備和MH電極性能研究
DOI:
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

TG146.4

基金項目:

國家自然科學(xué)基金資助項目(50171021);本研究同時得到蘭州理工大學(xué)"特色研究方向資助計劃"的支持


Preparation of Hydrogen Storage Alloy La0.67Mg0.33Ni2.5Co0.5 and Its Electrochemical Properties
Author:
Affiliation:

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評論
    摘要:

    采用高頻感應(yīng)熔煉方法制備了PuNi3型La0.67Mg0.33Ni2.5Co0.5合金；用X射線衍射分析和電化學(xué)方法研究了添加不同Mg含量以補(bǔ)償Mg元素?zé)龘p時合金的組織結(jié)構(gòu)和電化學(xué)性能。X射線衍射分析(XRD)表明，鑄態(tài)合金由．PuNi3型主相和少量的CaCu5型第二相組成，鑄態(tài)合金經(jīng)1223K和10h退火處理后，CaCu5型第二相可明顯減少，其中Mg增加10％時得到純度較高的PuNi3型組織。電化學(xué)測試表明，增加適當(dāng)Mg含量和進(jìn)行退火熱處理能明顯提高和改善合金電極容量、循環(huán)穩(wěn)定性和大電流放電性能。與AB5型和。482型Laves相貯氫合金比較，PuNi3型La0.67Mg0.33Ni2.5Co0.5貯氫合金具有電極容量高及優(yōu)良的大電流放電性能。

    Abstract:

    The La0.67Mg0.33Ni2.5Co0.5 hydrogen storage alloy with PuNi3-type was prepared using induction melting followed by heating treatment. In order to compensate Mg loss during alloy melting, the different mass percent Mg was supplemented into the melt. The microstructure and electrochemical properties of the alloys were investigated by using XRD and electrochemical method. The results show that the ingot is composed of main phase with PuNi3 type structure and a little second phase with CaCu5 structure. After heat treatment at 1 223 K for 10 h, the amount of the second phase in the annealed alloy is remarkably decreased and a more homogenous and purified PuNi3 type microstructure is obtained in the case of 10% Mg supplement. The electrochemical analyses show that the electrochemical properties of the alloy, such as activation, capacity, cycling stability and discharge ability at different current density, are well improved by supplementing proper Mg and annealing heat treatment. In comparison with AB5 type and AB2 with laves phase hydrogen storage alloys, the La0.67Mg0.33Ni2.5Co0.5 alloy has high capacity and quite good kinetics of electrochemical reaction.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

王大輝 羅永春 閆汝煦 興長策 康龍. La0．67Mg0．33Ni2．5Co0．5貯氫合金的制備和MH電極性能研究[J].稀有金屬材料與工程,2004,33(12):1283~1286.[Wang Dahui, Luo Yongchun, Yan Ruxu, Xing Changce, Kang Long. Preparation of Hydrogen Storage Alloy La0.67Mg0.33Ni2.5Co0.5 and Its Electrochemical Properties[J]. Rare Metal Materials and Engineering,2004,33(12):1283~1286.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:
  • 最后修改日期:2003-06-12
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期: