Given that the booming development of smart wearable, miniaturized and integrated electronics, rechargeable zinc ion batteries (ZIBs) have shown immense advantage in this field on account of high safety, abundant zinc reserves and environmentally friendly. However, appropriate cathodes materials that show high capacity and rate capability for high-perfromance microbatteries are still scarce. Herein, atomically thin V₂O₅ nanobelt (∼2 nm thickness) with layered crystal structure are first investigated as the cathode of ZIBs. V₂O₅@CNTs flexible electrodes are subsequently constructed by combining the V₂O₅ nanobelts and carbon nanotubes (CNTs). The interpenetrating network in the electrode formed by the one-dimensional (1D) nanoblets and nanotubes ensures fast electronic and ionic transport. Meanwhile, considering the unique thickness and crystal feature of V₂O₅ nanobelts, it provides great chance for the electrode to realize large intercalation pseudocapacitance. As a results, V₂O₅@CNTs hybrid film electrode exhibits ultrahigh capacity of 485.8 mAh g ^− 1 at 0.1 A g ^− 1, admirable rate capability of 137.6 mAh g ^− 1 at 50 A g ^− 1, as well as large energy density of 352 Wh kg⁻¹. Further, V₂O₅@CNTs cathode were assembled in quasi-solid-state zinc ion microbatteries (ZIMBs), and exhibits excellent electrochemical performance of 112.5μWh cm⁻², demonstrating great potential in microsized energy storage devices.

随着智能可穿戴、小型化和集成化电子产品的蓬勃发展，可充电锌离子电池（ZIBs）以其安全性高、锌储量丰富、环境友好等特点在该领域显示出巨大的优势。然而，对于高性能微电池显示出高容量和倍率能力的合适正极材料仍然很少。在此，首先研究了具有层状晶体结构的原子级薄 V ₂ O ₅纳米带（约 2 nm 厚度）作为 ZIBs 的阴极。随后通过结合 V ₂ O ₅构建V ₂ O _{5 @CNTs 柔性电极}纳米带和碳纳米管（CNT）。由一维 (1D) 纳米片和纳米管形成的电极中的互穿网络确保了快速的电子和离子传输。_{同时，考虑到V 2} O ₅纳米带独特的厚度和晶体特性，为电极实现大插层赝电容提供了很好的机会。结果，V ₂ O ₅ @CNTs 复合薄膜电极在 0.1 A g  ^{- 1}时表现出 485.8 mAh g  ^{-  1}的超高容量，在 50 A g  ^{- 1}时表现出令人赞叹的 137.6 mAh g  ^{- 1}倍率性能，以及大能量密度为 352 Wh kg   ^-1。此外，V ₂ O ₅ @CNTs正极组装在准固态锌离子微电池（ZIMBs）中，表现出112.5μWh cm ^-2的优异电化学性能，在微型储能器件中显示出巨大潜力。