Phosphorus‐doping and oxygen vacancy endowing anatase TiO <sub>2</sub> with excellent sodium storage performance
Hongshun Zhao, Yanli Qi, Kang Liang, Wei-Kai Zhu, Hao Bin Wu, Jianbin Li, Yurong Ren
Abstract
Abstract Titanium dioxide is considered to be promising anode for sodium‐ion batteries due to stable structure during the charge/discharge process. However, its practical application is hindered by the slow electron/ion transport. Herein, phosphorus‐doped anatase TiO 2 nanoparticles with oxygen vacancies are successfully synthesized and utilized as high‐performance sodium‐storage materials. The dual strategy of phosphorus‐doping and oxygen vacancies can concurrently boost electronic conductivity and adjust ion diffusion kinetics. They significantly contribute to the improved rate performance (167 mAh·g −1 at 20.0C) and stable cycling (95.9% after 2000 cycles at 20.0C). The proposed dual strategy can be potentially used to improve other oxide anodes for rechargeable batteries.