| Mn元素对储氢合金(La_(0.78)Mg_(0.22))(Ni_((0.9-x))Co_(0.1)Mn_x)_(3.5)的结构及电化学性能的影响 |
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| 引用本文： | 张灏,汪保国,王丹,眭艳辉,何丹农,夏保佳. Mn元素对储氢合金(La_(0.78)Mg_(0.22))(Ni_((0.9-x))Co_(0.1)Mn_x)_(3.5)的结构及电化学性能的影响[J]. 上海金属, 2010, 32(2): 16-19 |
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| 作者姓名： | 张灏 汪保国 王丹 眭艳辉 何丹农 夏保佳 |
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| 作者单位： | 1. 纳米技术及应用国家工程研究中心,上海,200241
2. 中国科学院上海微系统与信息技术研究所 |
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| 基金项目： | 上海市科委科研计划项目基金资助 |
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| 摘 要： | 感应熔炼法制备了(La_(0.78)Mg_(0.22))(Ni_((0.9-x))Co_(0.1)Mn_x)_(3.5)(x=0.00,0.01,0.03,0.05,0.07)合金,并在氩气气氛下,以1 173 K温度退火处理。XRD相结构分析表明,合金具有多相结构,随着Mn含量的不同分别含有:La_2Ni_7相、LaNi_5相和LaNi_3相。P-C-T性能测试表明,合金在3 MPa压力和298 K温度下的吸氢量高达1.6 wt.%。电化学测试表明,合金放电容量随着Mn含量的增大而减小,由x=0时的394.2 mAh/g下降到x=0.07时的363.3 mAh/g,充放电循环性能是先下降,后上升,再下降。合金的倍率性能随着Mn含量的增加先上升,后下降,然后又上升。当放电电流密度为3 000 mA/g时,高倍率性能由x=0时的201.6 mAh/g变为x=0.07时的182.9 mAh/g。研究表明当x=0.03时合金具有比较好的综合性能。
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| 关 键 词： | 储氢合金 相 相P-C-T 电化学性能 |
EFFECT OF Mn CONTENT ON THE STRUCTURE AND ELECTROCHEMICAL CHARACTERISTICS OF(La_(0.78)Mg_(0.22))(Ni_((0.9-x))Co_(0.1)Mn_x)_(3.5) HYDROGEN STORAGE ALLOYS |
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| Zang Hao,Wang Baoguo,Wang Dan,Sui Yanhui,He Dannong,Xia Baojia. EFFECT OF Mn CONTENT ON THE STRUCTURE AND ELECTROCHEMICAL CHARACTERISTICS OF(La_(0.78)Mg_(0.22))(Ni_((0.9-x))Co_(0.1)Mn_x)_(3.5) HYDROGEN STORAGE ALLOYS[J]. Shanghai Metals, 2010, 32(2): 16-19 |
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| Authors: | Zang Hao Wang Baoguo Wang Dan Sui Yanhui He Dannong Xia Baojia |
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| Affiliation: | Zhang Hao~1 Wang Baoguo~1 Wang Dan~1 Sui Yanhui~1 He Dannong~1 Xia Baojia~2 (1.National Engineering , Research Center for Nanotechnology,2.Shanghai Institute of Microsystem , Information Technology,Chinese Academy of Sciences) |
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| Abstract: | The effect of Mn content on the crystal structure,thermodynamics and electrochemical properties of(La_(0.78)Mg_(0.22))(Ni_((0.9-x))Co_(0.1) Mn_x )_(3.5)(x =0.00,0.01,0.03,0.05 and 0.07) alloys was studied systematically.The phase structures identified by X-ray diffraction(XRD) showed that the alloys consisted of three phases,La_2 Ni_7,LaNi_5 and LaNi_3 phase,depending on the different amount of Mn,The properties of hydrogen absorption and desorption were determined by Pressure Composition Temperature(P-C-T)... |
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| Keywords: | La2Ni7 LaNi5 |
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