Electrochemically in situ formed rocksalt phase in titanium dioxide determines pseudocapacitive sodium-ion storage

D Dafu Tang (State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Materials, Xiamen University, Xiamen 361005, China) R Ruohan Yu (Wuhan University of Technology the Sanya Science and Education Innovation) Y Yalong Jiang J Jiantao Li Z Zerui Yan S Sicheng Fan X Xiaojuan Huang S Sungsik Lee (X-ray Science Division) T Tianyi Li (X-ray Science Division, Advanced Photon Sources) Q Qingshui Xie L Liqiang Mai D Dong-Liang Peng Q Qiulong Wei (State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Materials, Xiamen University, Xiamen 361005, China)