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Effects of ZrO2 Coating on LiNi1/3Mn1/3Co1/3O2 Particle with Microwave Pyrolysis |
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| Authors: | Jiang Du Zhengfu Zhang Jinhui Peng Yamei Han Yi Xia Shaohua Ju Shenghui Guo Chongyan Leng Guo Chen Lei Xu Junsai Sun Hongge Yan |
| Affiliation: | 1. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China 2. National Local Joint Engineering Laboratory of Engineering Applications of Microwave Energy and Equipment Technology, Kunming, 650093, China 3. Key Laboratory of Unconventional Metallurgy, Ministry of education, Kunming University of Science and Technology, Kunming, 650093, China 4. College of Materials Science and Engineering, Hunan University, Changsha, 410082, China |
| Abstract: | In this paper, ZrO2-coated LiNi1/3Mn1/3Co1/3O2 is successfully prepared by the microwave pyrolysis method. The structure and electrochemical properties of the ZrO2-coated LiNi1/3Co1/3Mn1/3O2 are investigated using x-ray diffraction, AC impedance, and charge/discharge tests, indicating that the lattice structure of LiNi1/3Co1/3Mn1/3O2 is unchanged after the coating but the cycling stability is improved. As the coating amount is 2 wt.%, initial capacity of the coated LiNi1/3Co1/3Mn1/3O2 decreases slightly. However, the cycling stability increases remarkably over the cut-off voltages of 2.75~4.3 V and the capacity retention reaches 93.1% after 50 cycles. Electrochemical impedance spectra results show that the increase of charge transfer resistance during cycling is suppressed significantly by coating with ZrO2. |
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