Structure and Electrochemical Properties of O3-Type Layered LixMn0.5Ni0.25Ti0.25O2 Prepared by Ion-Exchange
Structure and Electrochemical Properties of O3-Type Layered LixMn0.5Ni0.25Ti0.25O2 Prepared by Ion-Exchange
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离子交换法制备O3型层状LixMn0.5Ni0.25Ti0.25O2的结构和电化学性能
DOI：
10.4028/www.scientific.net/kem.566.123
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Junichi Imaizumi
中科院分区：
文献类型：
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作者：
N. Ishida;H. Hayakawa;J. Akimoto;H. Shibuya;Junichi Imaizumi
以Na₀.₇Mn₀.₅Ni₀.₂₅Ti₀.₂₅O₂为起始化合物，通过Na/Li离子交换制备了Li₀.₅₅Na₀.₀₃Mn₀.₅Ni₀.₂₅Ti₀.₂₅O₂。Li₀.₅₅Na₀.₀₃Mn₀.₅Ni₀.₂₅Ti₀.₂₅O₂是一种具有O3结构的层状岩盐型氧化物。O3 - Li₀.₅₅Na₀.₀₃Mn₀.₅Ni₀.₂₅Ti₀.₂₅O₂的电化学锂嵌入/脱出性能在2.0到4.8 V的电压范围内表现出约190 mAh g⁻¹的可逆容量。电压曲线在4.0 V和3.0 V左右有两个平台。在循环过程中，层状结构保持不变，不会转变为尖晶石结构。
Li0.55Na0.03Mn0.5Ni0.25Ti0.25O2 was prepared via Na/Li ion exchange from Na0.7Mn0.5Ni0.25Ti0.25O2 as a starting compound. Li0.55Na0.03Mn0.5Ni0.25Ti0.25O2 is a layered rocksalt-type oxide with the O3 structure. The electrochemical lithium insertion/extraction properties of O3-Li0.55Na0.03Mn0.5Ni0.25Ti0.25O2 exhibits a reversible capacity of approximately 190 mAh g-1 in the voltage range between 2.0 and 4.8 V. The voltage profile consists of two plateaus around 4.0 and 3.0 V. The layered structure remains unchanged and does not transform to the spinel structure during cycling.