Preparation and Electrochemical Properties of LiNi2/3Co1/6Mn1/6O2 Cathode Material for Lithium-Ion Batteries |
| |
| Authors: | Meijie Zhu Jiangang Li Zhibei Liu Li Wang Yuqiong Kang Zhaohan Dang Jiasen Yan Xiangming He |
| |
| Institution: | 1.Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, School of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China; (M.Z.); (Z.L.); (Z.D.); (J.Y.);2.Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;3.Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China;4.Wuxi Vfortune New Energy Battery Materials Co., Ltd., Wuxi, Jiangsu 214135, China |
| |
| Abstract: | The cathode material LiNi2/3Co1/6Mn1/6O2 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 LiNi2/3Co1/6Mn1/6O2 material. The sample calcinated at 800 °C under O2 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 LiNi2/3Co1/6Mn1/6O2 is a promising cathode material for lithium-ion batteries. |
| |
| Keywords: | lithium ion batteries cathode material LiNi2/3Co1/6Mn1/6O2 preparation rheological phase method |
|
|
