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Ni_0.67Mg_0.33O贮锂性能的研究

Study of Electrochemical Lithium Intercalation Performance of Ni_0.67Mg_0.33O

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【Author】 HUANG Zhen_cai,CHEN Mao_hui, WU Guo_tao, YOU Jin_kua, LIN Zu_geng*Dept. of Chem., Xiamen Univ., Xiamen 361005, China)

【机构】厦门大学化学系固体表面物理化学国家重点实验室；厦门大学化学系固体表面物理化学国家重点实验室福建厦门　361005；福建厦门　361005；福建厦门　361005；

【摘要】通过溶胶-凝胶法制备了Ni-Mg-O及作为对照物的NiO样品,研究了其电化学嵌锂性能,并对样品进行了XRD结构表征,Rietveld精化以及贮锂性能测试.结果表明:Ni-Mg-O电极由于Mg的掺入而抑制了其中Ni2+的还原,导致材料的比容量降低.但同时又因该样品形成均一的固溶体使得NiO分散效果较好,从而改善其循环性能.更多还原

【Abstract】 In the present work, Ni0.67Mg0.33O and NiO were produced by sol_gel method, and characterized by XRD, a rietveld refinement and the discharge/charge test.It was found that the magnesium_doping restrained the reduction of Ni and decreased the reversible capacity for the sample of Ni0.67Mg0.33O. But the formation of the solid solution after the magnesium_doping facilitated the high dispersion of NiO, and accordingly improved the electrochemical performance.更多还原