钒
五氧化二铁
锌
无机化学
阴极
氧化钒
化学
材料科学
化学工程
冶金
物理化学
工程类
作者
Jinchen Qian,Yurong You,Zixuan Fan,Xingyu Liu,Jun Tang,Wei He,ZhengMing Sun
标识
DOI:10.1016/j.est.2023.106988
摘要
Hydrated vanadium pentoxide is a promising cathode candidate for zinc ion batteries due to its open-framework crystal structure and high capacity. Nevertheless, the strong electrostatic interaction between the inserted Zn2+ and host cause sluggish reaction kinetics and limited cycle performance. Herein, an N doped Mn pre-intercalated hydrated vanadium pentoxide (N-MVO) is successfully synthesized by nitrogen plasma treatment. The pre-intercalated Mn and strong VN stabilizes the host structure, and the oxygen vacancies caused by N introduction weaken the interaction between Zn2+ and host, facilitate the insertion/extraction of the Zn2+, resulting in superior rate capacity and long cycle stability. Remarkably, at a current density of 5 A g−1, the cell with the N-MVO cathode demonstrates a specific capacity of 197 mAh g−1 with retention of 88 % over 2000 cycles.
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