N-doped carbon coated TiO2 hollow spheres as ultralong-cycle-life Na-ion battery anodes
作者： Beibei Liu , Jin Wang , Junhua Li , Kaili Fan , Dan Zhao
DOI: 10.1016/J.JPCS.2019.06.021
关键词:
摘要: Abstract We used a simple solvothermal–pyrolytic two-step route to synthesize N-doped carbon coated anatase TiO2 (TiO2@NC) hollow spheres, where dopamine hydrochloride was simultaneously as the sources of nitrogen and carbon. The unique structure TiO2@NC spheres introduced coating layer resulted in excellent structural stability, facile electrolyte access, high electronic conductivity, short charge-transportation paths, rapid Na+ reaction kinetics. When applied Na-ion battery anodes, exhibited electrochemical performance, which afforded reversible capacity 260.4 mAh g−1 at rate 0.25C after 300 cycles 108.2 10C even 10000 cycles, with cycling stability (95.8% retention maximum capacity). This superhigh is among highest reported for TiO2/C-based anode materials batteries.
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