| Autor: |
Zhu M; Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, School of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China., Li J; Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, School of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China., Liu Z; Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, School of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China., Wang L; Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China., Kang Y; Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China., Dang Z; Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, School of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China., Yan J; Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, School of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China., He X; Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China.; Wuxi Vfortune New Energy Battery Materials Co., Ltd., Wuxi, Jiangsu 214135, China. |
| Abstrakt: |
The cathode material LiNi 2/3 Co 1/6 Mn 1/6 O 2 with excellent electrochemical performance was prepared successfully by a rheological phase method. The materials obtained were characterized by X-ray diffraction, scanning electron microscopy, electrochemical impedance spectroscopy and charge-discharge tests. The results showed that both calcination temperatures and atmosphere are very important factors affecting the structure and electrochemical performance of LiNi 2/3 Co 1/6 Mn 1/6 O 2 material. The sample calcinated at 800 °C under O 2 atmosphere displayed well-crystallized particle morphology, a highly ordered layered structure with low defects, and excellent electrochemical performance. In the voltage range of 2.8-4.3 V, it delivered capacity of 188.9 mAh g -1 at 0.2 C and 130.4 mAh g -1 at 5 C, respectively. The capacity retention also reached 93.9% after 50 cycles at 0.5 C. All the results suggest that LiNi 2/3 Co 1/6 Mn 1/6 O 2 is a promising cathode material for lithium-ion batteries. |
