【摘要】 V₂O₅·nH₂O是一种很有应用前景的用于水系锌离子电池的正极材料。无机离子的插层已被证实是提高五氧化二钒容量的可行方法。为了进一步提高稳定性，采用有机小分子氯化胆碱嵌入来扩大五氧化二钒层的间距，增加循环稳定性。因此，我们考虑引入Sr²⁺与氯化胆碱共嵌入。本文通过简单的水热法合成了与Sr²⁺和胆碱离子共嵌入的五氧化二钒（Sr&Ch-V₂O₅）。电化学性能显示Sr&ChV₂O₅的阴极电容贡献增强，在0.1 A·g^-1下放电容量为526 mAh·g^-1，在5 A·g^-1下循环2000次后保留率为78.9%。这项工作为水系锌离子电池正极有机-无机杂化材料的设计提供了一种新的策略。更多还原

【Abstract】 V₂O₅·n H₂O has been widely studied for aqueous zinc-ion batteries. The intercalation of inorganic ions has been used as a feasible method to improve the capacity of vanadium pentoxide. To further improve the stability, organic small molecule choline chloride intercalation is used to expand the spacing of the vanadium pentoxide layers and increase the cycling stability. Therefore, we consider the introduction of Sr²⁺ to cointercalate with choline chloride. Here, we synthesized vanadium pentoxide cointercalated with Sr²⁺ and choline ions（Ch+） via a simple hydrothermal method. The electrochemical performance shows an enhanced cathode capacitance contribution of Sr&Ch-V₂O₅, with a discharge capacity of 526 mAh·g^-1 at 0.1 A·g^-1and a retention rate of 78.9% after 2000 cycles at 5 A·g^-1. This work offers a novel strategy for the design of organic-inorganic hybrid materials for use as cathodes in aqueous zinc-ion batteries.更多还原