电解二氧化锰制备富锂锰基正极材料性能研究
发布时间：2018-08-19 17:11
【摘要】：以电解二氧化锰为锰源,采用球磨法和高温固相法制备了富锂锰基正极材料Li_(1.2)Mn_(0.54)Co_(0.13)Ni_(0.13)O_2。探索了烧结温度对富锂锰基材料结构和性能的影响,确定了最佳温度条件。采用X射线衍射和扫描电子显微镜对所合成的正极材料进行了结构和形貌表征,同时通过充放电测试对材料电化学性能进行了测试。结果表明,在850℃下,以电解二氧化锰为锰源制备的富锂锰基正极材料具有较好的电化学性能,在0.05C、0.1C、0.2C、0.5C和1C下的首次放电比容量为254.8、238.1、217.6、179.9和161.8 mAh/g。在0.2C下循环20次,容量保持率为93.66%,在0.5C下循环50次容量保持率为90.03%,在1C下循环100次容量保持率为88.31%。
[Abstract]:Li _ (1.2) mn _ (0.54) Co _ (0.13) Ni _ (0.13) O _ 2 was prepared by ball milling and high temperature solid state method with electrolytic manganese dioxide as manganese source. The effect of sintering temperature on the structure and properties of lithium-rich manganese based materials was investigated and the optimum temperature conditions were determined. The structure and morphology of the synthesized cathode materials were characterized by X-ray diffraction and scanning electron microscopy, and the electrochemical properties of the materials were tested by charge-discharge tests. The results show that the lithium-rich manganese based cathode materials prepared by electrolytic manganese dioxide at 850 鈩，
本文编号：2192298
[Abstract]:Li _ (1.2) mn _ (0.54) Co _ (0.13) Ni _ (0.13) O _ 2 was prepared by ball milling and high temperature solid state method with electrolytic manganese dioxide as manganese source. The effect of sintering temperature on the structure and properties of lithium-rich manganese based materials was investigated and the optimum temperature conditions were determined. The structure and morphology of the synthesized cathode materials were characterized by X-ray diffraction and scanning electron microscopy, and the electrochemical properties of the materials were tested by charge-discharge tests. The results show that the lithium-rich manganese based cathode materials prepared by electrolytic manganese dioxide at 850 鈩，
本文编号：2192298
本文链接：https://www.wllwen.com/kejilunwen/dianlidianqilunwen/2192298.html
