The construction of hollow structures has been used as an efficient strategy to improve electrochemical properties in lithium‐ion batteries (LIBs). In this paper, novel Co₂V₂O₇ hollow cylinders have been fabricated via a unique etching process, in which H₂O₂ and CO(NH₂)₂ were selected as the etching agent and the release rate controlling agent, respectively. The formation process for the hollow structure and the etching mechanism have been investigated. Benefiting from the improved diffusion and transport of Li⁺, the Co₂V₂O₇ hollow cylinder electrode demonstrates higher electrochemical performance as an anode material for LIBs than that of Co₂V₂O₇ solid hexagonal prisms. Under a current density of 0.4 A g⁻¹, the cycling capacity can be improved to 2.5 times greater than that of non‐etched hexagonal prisms.

中文翻译：

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使用H2O2作为蚀刻剂合成具有增强的锂储存性能的Co2V2O7空心圆筒

中空结构的构造已被用作改善锂离子电池（LIB）电化学性能的有效策略。本文通过独特的刻蚀工艺制备了新型的Co ₂ V ₂ O ₇空心圆柱体，其中分别选择了H ₂ O ₂和CO（NH ₂）₂作为刻蚀剂和释放速率控制剂。研究了中空结构的形成过程和蚀刻机理。受益于改善的Li ⁺，Co ₂ V ₂ O _7的扩散和传输与Co ₂ V ₂ O ₇实心六棱柱相比，中空圆柱电极具有更高的电化学性能，可作为LIB的阳极材料。在0.4 A g ^-1的电流密度下，循环容量可以提高到非蚀刻六边形棱镜的2.5倍。