Surface nano-ZnO doped LiNi1/3Co1/3Mn1/3O2 for an improved elevated temperature performance by a facile low-temperature solid-state process
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Surface modified with nano-ZnO LNCM power has been successfully prepared using facile low-temperature solid-state route. The experimental results show that the reaction temperature has a great influence on the structure of coating layer. ZnO@LNCM-400 shows the best electrochemical performance, which has lesser capacity loss than the others. It shows superior performance with higher capacity (216.6 mAh g−1) and significantly improved cycling stability (maintaining 97.28% of its initial discharge capacity after 100 cycles). Moreover, it has excellent rate performance especially at elevated performance, which is probably due to the faster Li+ transportation by the nano-ZnO layer. The ZnO-coated LNCM electrode showed less capacity loss about 15.8%, even at 55 °C after 100 cycles. We found that ZnO played an important role in reducing the HF content in the electrolyte solution and improving the electrical conductivity of the material, which is beneficial to the electrochemical performance of material.
KeywordsNano-ZnO LNCM Elevated temperature performance Rates performance Li-ion batteries
The work is supported by the National Natural Science Foundation of China (Grant No.: 51473082, 51273096 and 51603109), the programme of Introducing Talents to the Universities (111 plan) and the National One-Thousand Foreign Expert Program (No. WQ20123400111), the Natural Science Foundation of Shandong province (No. ZR2017BEM047), and the postdoctoral science foundation of China (No. 2017M610408).
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