Effects of Al2O3 and LiAlO2 Co-coating on electrochemical properties of LiNi0.8Co0.1Mn0.1O2 cathode materials |
| |
| Affiliation: | 1. College of Physics and Electronic Information Engineering, Qinghai Normal University, Xining, 810000, China;2. Academy of Plateau Science and Sustainability, Qinghai Normal University, Xining, 810016, PR China;3. College of Mechanical Engineering, Qinghai University, Xining, 810016, China;4. Guandu School of Kunming No.1 Middle School, Kunming, 650206, China;1. Aix Marseille Université, Université de Toulon, CNRS, IM2NP, Marseille, CS 60584, Toulon, Cedex 9, F-83041, France;2. Université de Toulon, Aix Marseille Université, CNRS/INSU, IRD, MIO UM 110, CS 60584-83041, Toulon, CEDEX 9, France;1. College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China;2. Yibin Industrial Technology Research Institute of Sichuan University, Yibin, Sichuan, China;3. College of Polymer Science & Engineering and State Key Lab Polymer Material & Engineering, Sichuan University, Chengdu, 610065, China;4. School of Chemical and Process Engineering, University of Leeds, Leeds, United Kingdom;1. Laboratory of Infrared Material and Devices, Advanced Technology Research Institute, Ningbo University, Ningbo, Zhejiang, 315211, China;2. Key Laboratory of Photoelectric Detection Materials and Devices, Zhejiang Province, Ningbo, Zhejiang, 315211, China;3. Engineering Research Center for Advanced Infrared Photoelectric Materials and Devices of Zhejiang Province, Ningbo University, Ningbo, 315211, China;4. Ningbo Institute of Oceanography, Ningbo, 315832, China |
| |
| Abstract: | Lithium-ion batteries are widely used in aerospace, power vehicles, portable electronic devices and other fields because of their environmental friendliness, rechargeable cycle and high energy density. The nickel-cobalt-manganese ternary materials with high nickel has high specific discharge capacity and is regarded as one of the most promising cathode materials. However, with the increase of the number of cycles, the cycle performance becomes worse and the specific capacity decays sharply. In this work, Al2O3 and LiAlO2 were coated on the surface of NCM811 by combining ball milling mixing and solid-phase synthesis to prepare the AL-NCM811 cathode material. The coating thickness formed by Al2O3 and LiAlO2 was 10–70 nm, which effectively improves the cycle stability and rate performance of NCM811 material. When charged and discharged at 0.1C, the first discharge specific capacity and capacity retention rate after 100 cycles of 0.5AL-NCM811 were 196.26 mAh/g and 96.47%, respectively, while those of NCM811 were only 193.78 mAh/g and 72.18%, respectively. When the current density was 5.0C, the discharge specific capacity of 0.5AL-NCM811(139.16 mAh/g) was 55.368 mAh/g higher than that of NCM811(83.80 mAh/g). |
| |
| Keywords: | NCM811 Coating Electrochemical performance |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
