| 车用金属氢化物-镍电池负极材料的性能 |
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| 引用本文： | 佘翔,刘冬梅,李雪,沈伟杰.车用金属氢化物-镍电池负极材料的性能[J].电池,2022,52(1):38-42. |
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| 作者姓名： | 佘翔 刘冬梅 李雪 沈伟杰 |
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| 作者单位： | 浙江经济职业技术学院汽车技术学院,浙江杭州 310018,杭州职业技术学院吉利汽车学院,浙江杭州 310018,浙江理工大学材料科学与工程学院,浙江杭州 311121 |
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| 摘 要： | 通过粉末烧结法制备不同前驱体LaNi5/LaMgNi4物质的量比(x)的车用金属氢化物-镍电池用La-Mg-Ni储氢合金,研究x对合金物相组成、显微组织和电化学性能的影响.储氢合金在x=0.75和0.95时,由(La,Mg)5Ni19和(La,Mg)2Ni7相组成;x=1.20时,为(La,Mg)5Ni19单相;x=1...
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| 关 键 词： | LaNi5 LaMgNi4 储氢合金 物相 电化学性能 金属氢化物-镍电池 |
Performance of anode material of metal hydride-nickel battery for automobile |
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| SHE Xiang,LIU Dong-mei,LI Xue,SHEN Wei-jie.Performance of anode material of metal hydride-nickel battery for automobile[J].Battery Bimonthly,2022,52(1):38-42. |
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| Authors: | SHE Xiang LIU Dong-mei LI Xue SHEN Wei-jie |
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| Affiliation: | (Automobile Technology School,Zhejiang Technical Institute of Economics,Hangzhou,Zhejiang 310018,China;Geely Automobile Institute,Hangzhou Vocational and Technical College,Hangzhou,Zhejiang 310018,China;School of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou,Zhejiang 311121,China) |
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| Abstract: | La-Mg-Ni hydrogen storage alloys of metal hydride-nickel battery for automobile with different precursor LaNi5/LaMgNi4molar ratio(x)were prepared by powder sintering method,the effects of x on phase composition,microstructure and electrochemical performance of the alloys were studied.The hydrogen storage alloy consisted of(La,Mg)5Ni19and(La,Mg)2Ni7phases when x=0.75 and 0.95,(La,Mg)5Ni19single phase when x=1.20,(La,Mg)5Ni19and LaNi5phases when x=1.50.All hydrogen storage alloys had good activation properties,with the increase of x,the maximum discharge capacity Qmax decreased gradually,the capacity retention rate at the 100th cycle S100 first decreased and then increased.When x=1.20,the S100 was minimum,the polarization resistance Rp was maximum and the exchange current I0 was minimum.The hydrogen diffusion coefficient D value of hydrogen storage alloys from large to small order was x=1.50,0.95,1.20 and 0.75.The appropriate(La,Mg)2Ni7and LaNi5 phases was helpful for the hydrogen storage to improve the rate capability,the discharge rate of electrode was positively correlated with D. |
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| Keywords: | LaNi5 LaMgNi4 hydrogen storage alloy phase electrochemical performance metal hydride-nickel battery |
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