Zn-doped V2O5 film electrodes as cathode materials for high-performance thin-film zinc-ion batteries

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics Pub Date : 2024-08-29 DOI:10.1016/j.ssi.2024.116658

Yigao Zhang , Haiyan Xu , Yang He , Hanxiao Bian , Renhua Jiang , Qiang Zhao , Dongcai Li , Aiguo Wang , Daosheng Sun

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Abstract

Zn-doped V₂O₅ film electrodes were prepared by in-situ growth on indium‑tin oxide (ITO) conductive glass by a low-temperature liquid-phase deposition method and calcined by calcination treatment, and assembled into thin-film zinc-ion batteries (ZIBs). After galvanostatic charge/discharge (GCD) tests with 90 and 200 charge/discharge cycles, the ZIBs system provided specific capacities of 95.7 mAh m⁻² and 63.9 mAh m⁻² with capacity retention rates of 97.88% and 78.72%, respectively. The electrochemical reaction process of the Zn-doped V₂O₅ film electrode was analyzed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) to understand the insertion/extraction mechanism of Zn²⁺. The doping of appropriate amount of Zn²⁺ in the preparation plays the role of “pillar”, which helps to stabilize the structure of V₂O₅ and improve the cycling stability and lifetime. Therefore, the research may provide a new idea for the assembly and preparation of thin-film ZIBs with improved performance.

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作为高性能薄膜锌离子电池阴极材料的掺锌 V2O5 薄膜电极

采用低温液相沉积法在铟锡氧化物（ITO）导电玻璃上原位生长制备了掺锌 V2O5 薄膜电极，并通过煅烧处理将其组装成薄膜锌离子电池（ZIBs）。经过 90 和 200 次充放电循环的电静态充放电（GCD）测试，ZIBs 系统的比容量分别为 95.7 mAh m-2 和 63.9 mAh m-2，容量保持率分别为 97.88% 和 78.72%。通过 X 射线衍射 (XRD) 和 X 射线光电子能谱 (XPS) 分析了掺杂 Zn 的 V2O5 薄膜电极的电化学反应过程，以了解 Zn2+ 的插入/萃取机制。制备过程中适量 Zn2+ 的掺杂起到了 "支柱 "的作用，有助于稳定 V2O5 的结构，提高其循环稳定性和寿命。因此，该研究可为组装和制备性能更优的薄膜 ZIB 提供新思路。

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来源期刊

Solid State Ionics 物理-物理：凝聚态物理

CiteScore

6.10

自引率

3.10%

发文量

152

审稿时长

58 days

期刊介绍： This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on: (i) physics and chemistry of defects in solids; (ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering; (iii) ion transport measurements, mechanisms and theory; (iv) solid state electrochemistry; (v) ionically-electronically mixed conducting solids. Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties. Review papers and relevant symposium proceedings are welcome.