A diffusion kinetics study of Li-ion in LiV3O8 thin film electrode

作者：Shi Qian; Hu Renzong; Zeng Meiqin; Zhu Min^*

来源：Electrochimica Acta, 2010, 55(22): 6645-6650.

DOI：10.1016/j.electacta.2010.06.009

• LiV3O8 thin film
• Li-ion battery
• Diffusion coefficient
• Electrode materials
• Magnetron sputtering

The kinetic behaviors of Li-ion insertion/extraction in LiV3O8 thin film have been investigated using cyclic voltammetry (CV), potentiostatic intermittent titration (PITT) and electrochemical impedance spectroscopy (EIS) method. This LiV3O8 thin film with a mixed amorphous-nanocrystalline microstructure was fabricated by RF sputtering. For the first time, the intrinsic kinetics of LiV3O8 thin film electrode is obtained. The D-Li center dot value is about 10(-13) cm(2)/s in mixed amorphous-nanocrystalline microstructure LiV3O8 thin film. Different to crystalline LiV3O8 thin film, the D. values do not change a lot with the increase of cell potential which is due to the absence of structural phase transition behavior in mixed microstructure LiV3O8 thin film during Li insertion/extraction process. This is also the reason for excellent capacity retention performance of LiV3O8 film with a mixed microstructure.

• 出版日期2010-9-1
• 单位华南理工大学