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(jí)檢索
Hydrogen Storage Properties of Co-free La-Mg-Ni-Based Alloys
DOI:
作者:
作者單位:

作者簡(jiǎn)介:

通訊作者:

中圖分類(lèi)號(hào):

基金項(xiàng)目:


Hydrogen Storage Properties of Co-free La-Mg-Ni-Based Alloys
Author:
Affiliation:

Fund Project:

National Natural Science Foundation of China (51071054, 50861003); the Natural Science Foundation of Guangxi (2010GXNSFD013004); the Foundation of Key Laboratory of National Education Ministry for Nonferrous Metals and Materials Processing Technology (GXKFJ09-15); the Guangxi University Program for Science and Technology Research (XBZ110379); the Innovation Team Project of Guangxi University

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問(wèn)統(tǒng)計(jì)
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評(píng)論
    摘要:

    在Ar氣保護(hù)下采用磁懸浮感應(yīng)熔煉方法，制備無(wú)Co La1.8Ti0.2MgNi9-xAlx (x=0, 0.1, 0.2, 0.3, 0.4)合金，系統(tǒng)研究Al取代Ni對(duì)合金的結(jié)構(gòu)及貯氫性能的影響。所有合金均包含LaMg2Ni9相，當(dāng)Al含量x≥0.1，La(Ni,Al)5相取代LaNi5相、LaNi3相消失、LaNi2相出現(xiàn)。測(cè)試合金的焓變值與LaNi5合金（–30.6 kJ/molH2）相近。Al取代Ni不僅提高合金電極的放電容量，而且改善循環(huán)穩(wěn)定性及電化學(xué)動(dòng)力學(xué)性能。La1.8Ti0.2MgNi8.7Al0.3合金貯氫性能較好，30 ℃下有效吸氫質(zhì)量分?jǐn)?shù)為1.32%；最大放電容量達(dá)到340 mAh/g；1400 mA/g放電電流密度下高倍率放電性能HRD1400高達(dá)79.8%；經(jīng)100次充放電循環(huán)放電容量保持率為60%

    Abstract:

    A series of Co-free La1.8Ti0.2MgNi9-xAlx (x=0, 0.1, 0.2, 0.3, 0.4) hydrogen storage alloys were prepared by magnetic levitation melting under Ar atmosphere. The effects of partially substituting Al for Ni on the structure and hydrogen storage properties of the alloys were investigated. For the La1.8Ti0.2MgNi9-xAlx (x=0, 0.1, 0.2, 0.3, 0.4) alloys, LaMg2Ni9 phase is contained in all samples. when Al content x≥0.1, La(Ni, Al)5 phase replaces LaNi5 phase, LaNi3 phase disappears and LaNi2 phase appears. The enthalpies of the test alloys are close to –30.6 kJ/molH2 of the LaNi5 compound. Al substitution for Ni favors the improvement of discharge capacity, cycling stability and electrochemical kinetics. The optimum alloy is found to be La1.8Ti0.2MgNi8.7Al0.3 alloy, with the effective hydrogen storage capacity of 1.32 wt% (at 30 °C), the maximum discharge capacity of 340 mAh/g, the HRD1400 of 79.8% and the discharge capacity retention of 60% after 100 charging/discharging cycles

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

蔣衛(wèi)卿,莫曉華,韋銀燕,藍(lán)志強(qiáng),韋文樓,郭 進(jìn). Hydrogen Storage Properties of Co-free La-Mg-Ni-Based Alloys[J].稀有金屬材料與工程,2013,42(5):891~896.[Jiang Weiqing, Mo Xiaohua, Wei Yinyan, Lan Zhiqiang, Wei Wenlou, Guo Jin. Hydrogen Storage Properties of Co-free La-Mg-Ni-Based Alloys[J]. Rare Metal Materials and Engineering,2013,42(5):891~896.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點(diǎn)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:2012-05-25
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期: