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纳米Mg₂Ni-Ni非晶合金的球磨制备和电极性能

Nano-amorphous Mg₂Ni-Ni alloys synthesized by ball milling and its electrochemical characteristics

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【Author】 WANG Zhong-min~1, ZHOU Huai-ying~1, GU Zheng-fei~1, CHENG Gang~1, ZHU Min~2 (1. Center of Material Science and Engineering, Guilin University of Electronic Technology,Guilin 541004,China; 2.Nano-Fuctional Materials Research Group, South China University of Technology, Guangzhou 510640,China)

【机构】桂林电子工业学院材料科学与工程中心；华南理工大学纳米功能材料研究室广西桂林541004；广西桂林541004；广东广州510640；

【摘要】球磨Mg2Ni合金粉和Ni粉制得纳米Mg2Ni Ni非晶合金。用XRD和SEM分析表征了球磨过程中的相和结构的变化。模拟电池测试结果表明,Mg2Ni/Ni复合粉的首次放电容量随球磨时间的延长有明显提高。当球磨150h形成了纳米Mg2Ni Ni非晶合金,其放电容量和电极循环性能得到明显改善。更多还原

【Abstract】 Nano-amorphous Mg₂Ni-Ni alloys have been synthesized by ball milling the powders of Mg₂Ni alloys and Ni. XRD and SEM analysis were used to characteristic the microstructure and phase of milled Mg₂Ni/Ni composite. Electrochemical properties were evaluated by simulated battery testing with the alloys as negative electrode, it was found that the discharge capacity of Mg₂Ni/Ni composite, especially initial discharge capacity, was obviously improved with the increase of milling time. Compared with Mg₂Ni/Ni composite, the enhancements in discharge capacity and cycle life were observed in nano-amorphous Mg₂Ni-Ni alloy synthesized by ball milling for 150h.更多还原