Abstract Zinc ion batteries (ZIBs) have attracted increasing attention due to their low cost, high safety and environmental friendliness. However, the simultaneous achievement of long cycle life and high energy density of ZIBs remains an open challenge. In this work, edge-rich cathodes with vertically orientated graphene (VG) nanosheets templating V2O5 nanosheets are designed for high-performance ZIBs. In such a hybrid structure, free-standing VGs on carbon cloth (CC) with non-aggregated characters, open networks and sharp edges as nanotemplates provide fast electron-transfer channels and large accessible surface area to electrolyte. Moreover, edge-rich Zn nanosheets are deposited on CC as anodes to match with edge-rich V2O5/VG/CC cathode. As a result, the assembled aqueous ZIB shows a high capacity of 370 mAh g−1 (at a current density of 0.2 A g−1), high rate capability (capacity retention of over 50% at a current density up to 50 A g−1) and excellent cycle life (showing a high capacity retention of 85% over 5000 cycles).

中文翻译：

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富边缘垂直石墨烯纳米片模板 V2O5 用于高度耐用的锌离子电池

摘要 锌离子电池（ZIBs）因其低成本、高安全性和环境友好性而受到越来越多的关注。然而，同时实现 ZIBs 的长循环寿命和高能量密度仍然是一个开放的挑战。在这项工作中，具有垂直取向石墨烯 (VG) 纳米片模板 V2O5 纳米片的富边缘阴极设计用于高性能 ZIB。在这种混合结构中，碳布 (CC) 上的独立 VG 具有非聚集特征、开放网络和锋利边缘作为纳米模板，为电解质提供了快速的电子转移通道和大的可及表面积。此外，富边缘的 Zn 纳米片沉积在 CC 上作为阳极，以与富边缘的 V2O5/VG/CC 阴极相匹配。结果，组装的水性 ZIB 显示出 370 mAh g-1 的高容量（电流密度为 0.