Kinetics of Lithium-Ion Transfer at the Interface between Li4Ti5O12 Thin Films and Organic Electrolytes
Kinetics of Lithium-Ion Transfer at the Interface between Li4Ti5O12 Thin Films and Organic Electrolytes
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DOI：
10.1149/2.0011408eel
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发表时间：
2014-01-01
影响因子：
--
通讯作者：
Abe, Takeshi
中科院分区：
文献类型：
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作者：
Ishihara, Yuya;Miyazaki, Kohei;Abe, Takeshi
采用Li 4 Ti 5 O 12薄膜电极和交流阻抗谱研究了氧化物负极与有机电解质界面处锂离子的迁移动力学。我们根据界面电导率的温度依赖性评估了界面锂离子转移的激活能。以LiClO_4/PC和LiClO_4/EC+DMC为电解质时，反应活化能分别为64和54 kJ mol（-1）。LiClO_4/DMC体系的活化能为37 kJ mol（-1），远低于PC和EC+DMC体系。界面锂离子转移的活化能取决于溶剂的溶剂化能力。(C)2014年电化学学会。All rights reserved.
Kinetics of lithium-ion transfer at the interface between oxide-negative electrodes and organic electrolytes was studied using a Li4Ti5O12 thin-film electrode and ac impedance spectroscopy. We evaluated the activation energies of the interfacial lithium-ion transfer from the temperature dependences of the interfacial conductivities. When we used LiClO4/PC and LiClO4/EC+DMC as the electrolytes, the activation energies were 64 and 54 kJ mol(-1), respectively. On the other hand, LiClO4/DMC gave the activation energy of 37 kJ mol(-1), which is much lower than those in PC and EC+DMC. The activation energies of the interfacial lithium-ion transfer depended on the solvation ability of solvents. (C) 2014 The Electrochemical Society. All rights reserved.