Structural Evolution and Electrochemical Studies of Lithiation/Delithiation in LiNi1-x-yCoxMnyO2

Abstract

锂离子电池以其高能量密度、长循环寿命、绿色无污染等优点已广泛应用于各类便携式电子设备中,并且逐渐扩展到新能源汽车、储能与军事应用等领域。进一步提高其能量密度和降低其成本是锂离子电池未来发展的主要方向,而锂离子电池的能量密度极大程度地取决于正极材料种类的选择,因此,需要开发高比能量、低成本的正极材料。 与传统商业化材料LiCoO2、LiFePO4、LiMn2O4相比,三元正极材料LiNi1-x-yCoxMnyO2具有比容量高、价格较低、倍率性能较好等优点,引起了研究者的广泛关注。为了进一步提高三元正极材料的比容量,可通过提高其充电截止电压或增加Ni的含量,但是材料的结构稳定性、循环性能以及热稳...Lithium ion battery has been widely used in various portable electronic devices, and gradually extended to new energy vehicles, energy storage, military applications and other fields due to the merits of high energy density, long cycle life and environmentally free. Improving the energy density and reducing cost are the most challenging in development of lithium ion battery. Since the energy densi...学位:理学硕士院系专业:化学化工学院_物理化学学号:2052014115157

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