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Interface engineering V2O5@PANI nanotube for high-performance aqueous zinc-ion batteries
Shen Wang1, Xueying Sun2, Hongbo Xu2
1College of Chemical and Material Engineering, Quzhou University, Quzhou 324000, China.
None:
Aqueous Zn-ion batteries offer safe and cost-effective energy storage, yet their energy density requires improvement. While vanadium pentoxide (V2O5) possesses attractive redox activity, its practical implementation is hindered by structural instability and limited cycling performance. Core-shell V2O5@PANI nanotubes are fabricated via in situ polymerization to enhance Zn2+ diffusion and structural resilience. This architecture facilitates interfacial charge transfer and stabilizes the host framework during cycling. The optimized cathode achieves a high capacity of 462.4 mAh g-1 at 0.5 A g-1 with 96.5% capacity retention over 500 cycles. This work demonstrates a synergistic combination of nanostructural control and interfacial engineering, providing a generalizable materials design strategy for advanced electrochemical energy storage systems.
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