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V2O5 ? nH2O and Graphene Oxide/CNTs Composite Film as Binder-Free Cathode for Aqueous Zinc-Ion Batteries

Diwen Rao,Wenwei Zhang, Baochen Cheng,Yu Wang, Chengsifan Lei,Qinyou An,Meng Huang,Liqiang Mai

BATTERIES & SUPERCAPS(2024)

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摘要
Emerging as a leading contender for economical, high-security grid-scale energy storage, rechargeable aqueous zinc-ion batteries (AZIBs) are currently facing the challenge in its progression due to the absence of cathode materials with high energy density. In this study, we design a V2O5 & sdot; nH(2)O, GO and CNTs composite (HVO/GO-CNTs) film through freeze-drying and vacuum filtration. This binder-free cathode for AZIBs exhibits remarkable electrochemical performance, featuring a high capacity of 387 mAh g(-1) at 0.2 A g(-1) and a high capacity retention of 82.6 % after 1000 cycles at 1 A g(-1). This investigation offers a promising approach to electrode material design for the advancement of high-performance AZIBs.
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关键词
Vanadium pentoxide,Zinc ion battery,Binder-free cathode,Carbon material
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