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锂离子电池正极材料LiMn_2-xNd_xO₄的性能研究

Research on Properties of Cathode Material LiMn_2-xNd_xO₄ for Li-ion Battery

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【Author】 Wang Xingqin*,Dai Yongnian,Li Weihong(Research Institute of Vacuum Metallurgy and Materials,Kunming University of Science and Technology,Kunming 650093,China)

【机构】昆明理工大学真空冶金与材料研究所；昆明理工大学真空冶金与材料研究所云南昆明650093；云南昆明650093；

【摘要】采用高温固相反应法,合成了具有尖晶石结构的锂离子电池正极材料LiMn2O4,并对其掺杂不同量的Nd,得到LiMn2-xNdxO4(x=0~0.03)。对材料进行了XRD、粒度分析及恒电流充放电测试。试验结果表明,掺杂微量稀土元素Nd合成的正极材料具有标准尖晶石结构,较好的循环稳定性。其中LiMn0.995Nd0.005O4具有较好的电化学性能和循环稳定性,最高容量达到132mAh.g-1。更多还原

【Abstract】 The spinel LiMn2O4 used as cathode materials for Li-ion battery were synthesized by solid state reaction and LiMn2-xNdxO4(x=0～0.03) were synthesized by doping different Nd.X-ray diffraction,SEM and charge-discharge were used for the testing of spinel LiMn2O4 cathode materials and the materials doped Nd.The experimental results show that the cathode material doped with little Nd exhibits standard spinel LiMn2O4,good properties of charge-discharge.Especially LiMn0.995Nd0.005O4 show excellent electrochemistry and properties of charge-discharge.The highest discharge capacity reaches to 132 mAh·g-1.更多还原