Charge Transfer across the Interface between LiNi0.5Mn1.5O4 High-Voltage Cathode Films and Solid Electrolyte Films
Charge Transfer across the Interface between LiNi0.5Mn1.5O4 High-Voltage Cathode Films and Solid Electrolyte Films
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DOI：
10.1149/2.0891504jes
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发表时间：
2015
影响因子：
3.9
通讯作者：
M. Gellert;K. Gries;J. Zakel;Sebastian Kranz;Stephan Bradler;Elisabeth Hornberger;Sandra Müller;C. Yada;F. Rosciano;K. Volz;B. Roling
中科院分区：
文献类型：
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作者：
M. Gellert;K. Gries;J. Zakel;Sebastian Kranz;Stephan Bradler;Elisabeth Hornberger;Sandra Müller;C. Yada;F. Rosciano;K. Volz;B. Roling
我们对LiNi 0.5 Mn 1.5 O 4 (LNMO)薄膜阴极和不同固体电解质涂层（即LiNbO 3、ZrO 2 和Li 4 Ti 5 O 12 ）之间界面的电荷转移进行了基础研究。与LNMO接触，尖晶石材料Li 4 Ti 5 O 12 应充当固体电解质，因为它在完全氧化状态下表现出非常低的电子电导率。通过溶胶-凝胶化学和旋涂法制备薄膜。通过结合电化学阻抗谱（EIS）、飞行时间二次离子质谱（ToF-SIMS）和截面SEM成像来研究电化学和界面性质。结果表明，LNMO/LiNbO 3 界面结合了低电荷转移电阻和高稳定性。
We have carried out a basic study on the charge transfer across the interface between LiNi 0.5 Mn 1.5 O 4 (LNMO) thin-film cathodes and different solid electrolyte coatings, namely LiNbO 3, ZrO 2 and Li 4 Ti 5 O 12. In contact to LNMO, the spinel material Li 4 Ti 5 O 12 should act as a solid electrolyte, since it exhibits a very low electronic conductivity in the fully oxidized state. The thin films were prepared by means of sol-gel chemistry and spin-coating. The electrochemical and interfacial properties were studied by combining electrochemical impedance spectroscopy (EIS), time-of-flight secondary-ion mass spectrometry (ToF-SIMS) and cross-sectional SEM imaging. The results show that the LNMO/LiNbO 3 interface combines a low charge transfer resistance with a high stability.