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高能量密度、功率密度和高温度稳定性的全固态薄膜锂离子电池是微电子器件的理想电源.开发新型的大比容量正极薄膜材料是解决问题的关键之一.与LiCoO2正极相比,层状结构的LiNi0.5Mn0.5O2有更高的可逆比容量和结构稳定性.本文应用脉冲激光沉积法制备LiNi0.5Mn0.5O2沉积薄膜,研究了衬底材料、温度对薄膜的微观结构、表面形貌及组分的影响.由LiNi0.5Mn0.5O2电极组装半电池,研究了薄膜的电化学性能与晶体结构、表面形貌及组分间的关系,表征了LiNi0.5Mn0.5O2沉积薄膜于不同充电截止电压的循环稳定性及倍率性能,并讨论了LiNi0.5Mn0.5O2薄膜的结构特点.
All-solid-state thin-film lithium-ion batteries with high energy density, power density and high temperature stability are ideal power sources for microelectronic devices.Development of a new type of large-capacity positive electrode thin-film material is one of the key problems to be solved.Compared with LiCoO2 cathode, Structure LiNi0.5Mn0.5O2 has higher reversible specific capacity and structural stability.In this paper, pulsed laser deposition method was used to prepare LiNi0.5Mn0.5O2 thin films, the effects of substrate materials and temperature on the microstructure, surface morphology Appearance and composition of LiNi0.5Mn0.5O2 electrode assembled by half-cell electrode, the electrochemical performance of the film and the crystal structure, surface morphology and the relationship between the components, characterized by LiNi0.5Mn0.5O2 deposited film in different The cycling stability and rate performance of charge-cutoff voltage are discussed. The structural characteristics of LiNi0.5Mn0.5O2 thin film are also discussed.