Xu Guangsheng, Zhang Yajuan, Gong Zhiwei, Lu Ting, Pan Likun
Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.
School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.
J Colloid Interface Sci. 2021 Jul;593:417-423. doi: 10.1016/j.jcis.2021.02.090. Epub 2021 Mar 9.
Aqueous zinc-ion batteries (ZIBs) have been considered to be potential energy storage devices because of their cost-effectiveness and environmental friendliness. However, most of the cathode materials reported in ZIBs exhibit poor electrochemical performances like capacity fading during cycling and inferior performance at high current densities, which significantly hinder the further development of ZIBs. Here, we reported a novel three-dimensional hydrated vanadium pentoxide (VO·nHO)/MXene composite via a simple one-step hydrothermal method. Owing to the unique structure and high electrical conductivity of MXene, VO·nHO/TiCT MXene shows a remarkable electrochemical performance with a reversible capacity of 323 mAh g at 0.1 A g and exceptional rate capability (262 mAh g at 1 A g and 225 mAh g at 2 A g) when used as the cathode for aqueous ZIBs. This work offers a new insight into fabricating novel vanadium oxide-based cathode material for aqueous ZIBs.
水系锌离子电池（ZIBs）因其成本效益高和环境友好性而被认为是潜在的储能装置。然而，ZIBs中报道的大多数阴极材料表现出较差的电化学性能，如循环过程中的容量衰减和高电流密度下的性能不佳，这显著阻碍了ZIBs的进一步发展。在此，我们通过一种简单的一步水热法报道了一种新型的三维水合五氧化二钒（VO·nHO）/MXene复合材料。由于MXene独特的结构和高导电性，VO·nHO/TiCT MXene用作水系ZIBs的阴极时，表现出卓越的电化学性能，在0.1 A g下可逆容量为323 mAh g，倍率性能优异（1 A g下为262 mAh g，2 A g下为225 mAh g）。这项工作为制备用于水系ZIBs的新型氧化钒基阴极材料提供了新的见解。
