The importance of electrolyte environment during in situ self-transformation for synthesizing V₂O₅nH₂O

Haijia Quan,Chen Wang, Dongxu Guo,Xiaofeng Wang,Chenglin Sun,Shenghan Wang

CHEMICAL COMMUNICATIONS（2024）

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摘要

V2O5nH(2)O is a promising cathode material for zinc-ion batteries. One of the synthesis methods of V2O5nH(2)O is in situ self-transformation. In this communication, we focus on the influence of the electrolyte environment during in situ self-transformation (from VO2 to V2O5nH(2)O). 2 M ZnSO4 and 2 M Zn(OTf)(2) were used as different electrolytes to produce VOH-1 and VOH-2. VOH-1 expands in volume along the electric field to form a porous surface structure and shows low crystallinity along the (0 0 1) plane, while VOH-2 exhibits the opposite. These advantages enable the assembled batteries with VOH-1 to maintain excellent cycling performance at a rate of 2 A g(-1) with a capacity of 500 mA h g(-1) and stable cycling for 1800 cycles.

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The importance of electrolyte environment during in situ self-transformation for synthesizing V2O5nH2O

The importance of electrolyte environment during in situ self-transformation for synthesizing V₂O₅nH₂O