Lv Tingting, Zhu Guoyin, Dong Shengyang, Kong Qingquan, Peng Yi, Jiang Shu, Zhang Guangxun, Yang Zilin, Yang Shengyang, Dong Xiaochen, Pang Huan, Zhang Yizhou
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, P. R. China.
Institute of Advanced Materials and Flexible Electronics (IAMFE), School of Chemistry and Materials Science, Nanjing University of Information Science and Technology, Nanjing, 210044, P. R. China.
Angew Chem Int Ed Engl. 2023 Jan 26;62(5):e202216089. doi: 10.1002/anie.202216089. Epub 2022 Dec 22.
Vanadium-based oxides with high theoretical specific capacities and open crystal structures are promising cathodes for aqueous zinc-ion batteries (AZIBs). In this work, the confined synthesis can insert metal ions into the interlayer spacing of layered vanadium oxide nanobelts without changing the original morphology. Furthermore, we obtain a series of nanomaterials based on metal-confined nanobelts, and describe the effect of interlayer spacing on the electrochemical performance. The electrochemical properties of the obtained Al V O ⋅ 2.07H O as cathodes for AZIBs are remarkably improved with a high initial capacity of 571.7 mAh ⋅ g at 1.0 A g . Even at a high current density of 5.0 A g , the initial capacity can still reach 205.7 mAh g , with a high capacity retention of 89.2 % after 2000 cycles. This study demonstrates that nanobelts confined with metal ions can significantly improve energy storage applications, revealing new avenues for enhancing the electrochemical performance of AZIBs.
具有高理论比容量和开放晶体结构的钒基氧化物是水系锌离子电池（AZIBs）很有前景的阴极材料。在这项工作中，受限合成可以将金属离子插入层状氧化钒纳米带的层间距中，而不改变其原始形态。此外，我们获得了一系列基于金属受限纳米带的纳米材料，并描述了层间距对电化学性能的影响。所制备的AlVO₂·2.07H₂O作为AZIBs阴极的电化学性能得到显著改善，在1.0 A g⁻¹ 时初始容量高达571.7 mAh g⁻¹。即使在5.0 A g⁻¹ 的高电流密度下，初始容量仍可达到205.7 mAh g⁻¹，在2000次循环后具有89.2%的高容量保持率。这项研究表明，金属离子受限的纳米带可以显著改善储能应用，为提高AZIBs的电化学性能开辟了新途径。
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