| 贮氢合金/石墨烯复合材料的电化学性能 |
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| 引用本文： | 夏同驰,李晓峰,董会超,李超. 贮氢合金/石墨烯复合材料的电化学性能[J]. 电池, 2012, 42(3): 146-148 |
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| 作者姓名： | 夏同驰 李晓峰 董会超 李超 |
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| 作者单位： | 郑州轻工业学院材料与化工学院,河南省表界面科学重点实验室,河南,郑州450002 |
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| 基金项目： | 河南省科技攻关项目，河南省教育厅科技攻关项目 |
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| 摘 要： | 用改进的Hummers 法制备了石墨氧化物,用化学还原法制得石墨烯聚集物；用研磨法制备了贮氢合金／石墨烯复合材料.循环伏安、线性极化法及模拟电池充放电实验结果表明:与未复合的贮氢合金相比,贮氢合金／石墨烯复合材料降低了电极的极化,改善了大电流放电性能及循环性能.在实验条件下,3.0 C放电比容量达225 mAh/g,提...
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| 关 键 词： | 贮氢合金 石墨烯 氢镍电池 复合材料 电化学性能 |
Electrochemical performance of hydrogen absorbing alloy/graphene composite |
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| XIA Tong-chi , LI Xiao-feng , DONG Hui-chao , LI Chao. Electrochemical performance of hydrogen absorbing alloy/graphene composite[J]. Battery Bimonthly, 2012, 42(3): 146-148 |
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| Authors: | XIA Tong-chi LI Xiao-feng DONG Hui-chao LI Chao |
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| Affiliation: | (Henan Provincial Key Laboratory of Surface & Interface,College of Material and ChemicalEngineering,Zhengzhou University of Light Industry,Zhengzhou,Henan 450002,China) |
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| Abstract: | Graphite oxide was prepared by modified Hummers’ method and then the graphene accumulation was prepared by a chemical reducing method.The graphene accumulation and hydrogen absorbing alloy were groud together to obtain a composite.The results of cyclic voltammetry,linear polarization and galvanostatic charge-discharge tests showed that compared to hydrogen absorbing alloy,the charge-discharge polarization of the composite electrode was decreased;its high-power and cyclic performance were improved.The discharge capacity of the electrode was 225 mAh/g at 3.0 C and 200 mAh/g at 5.0 C,which was increased by 64% and 220% respectively.The discharge voltage plateau of the electrodes was increased by 70 mV at 3.0 C and 120 mV at 5.0 C,respectively. |
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| Keywords: | hydrogen absorbing alloy graphene MH/Ni battery composite electrochemical performance |
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