Aqueous zinc-ion batteries (ZIBs) have obtained increasing attention owing to the high safety, material abundance, and environmental benignity. However, the development of cathode materials with high capacity and stable cyclability is still a challenge. Herein, the polypyrrole (PPy)-wrapped V 2 O 5 nanowire (V 2 O 5 /PPy) composite was synthesized by a surface-initiated polymerization strategy, ascribing to the redox reaction between V 2 O 5 and pyrrole. The introduction of PPy on the surface of V 2 O 5 nanowires not only enhanced the electronic conductivity of the active materials but also reduced the V 2 O 5 dissolution. As a result, the V 2 O 5 /PPy composite cathode exhibits a high specific capacity of 466 mAh g −1 at 0.1 A g −1 and a superior cycling stability with 95% capacity retention after 1000 cycles at a high current density of 5 A g −1. The superior electrochemical performance is ascribed to the large ratio of capacitive contribution (92% at 1 mV s −1) and a fast Zn 2+ diffusion rate. This work presents a simple method for fabricating V 2 O 5 /PPy composite toward advanced ZIBs.
Aqueous zinc-ion batteries (ZIBs) are deemed as the idea option for large-scale energy storage systems owing to many alluring merits including low manufacture cost, environmental friendliness, and high operations safety. However, to develop high-performance cathode is still significant for practical application of ZIBs. Herein, Ba 0.23 V 2 O 5 •1.1H 2 O (BaVO) nanobelts were fabricated as cathode materials of ZIBs by a typical hydrothermal synthesis method. Benefiting from the increased interlayer distance of 1.31 nm by Ba 2+ and H 2 O pre-intercalated, the obtained BaVO nanobelts showed an excellent initial discharge capacity of 378 mAh•g −1 at 0.1 A•g −1 , a great rate performance (e.g., 172 mAh•g −1 at 5 A•g −1 ), and a superior capacity retention (93% after 2000 cycles at 5 A•g −1 ).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.