Synthesis of V2O5·nH2O nanobelts@polyaniline core-shell structures with highly efficient Zn2+ storage

Jingjing Sun; Yunfeng Zhao; Yanyan Liu; Hanmei Jiang; Dongzhi Chen; Lisha Xu; Tao Hu; Changgong Meng; Yifu Zhang

doi:10.1016/j.jcis.2022.11.153

Synthesis of V₂O₅·nH₂O nanobelts@polyaniline core-shell structures with highly efficient Zn²⁺ storage

J Colloid Interface Sci. 2023 Mar:633:923-931. doi: 10.1016/j.jcis.2022.11.153. Epub 2022 Dec 5.

Authors

Jingjing Sun¹, Yunfeng Zhao¹, Yanyan Liu¹, Hanmei Jiang¹, Dongzhi Chen², Lisha Xu³, Tao Hu⁴, Changgong Meng⁵, Yifu Zhang⁶

Affiliations

¹ State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, PR China.
² State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan 430073, PR China. Electronic address: chdozh_2008@163.com.
³ Faculty of Physics and Electronic Science, Hubei University, 430062 Wuhan, PR China.
⁴ State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, PR China. Electronic address: inorchem@dlut.edu.cn.
⁵ State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, PR China; College of Environmental and Chemical Engineering, Dalian University, Dalian 116622, PR China.
⁶ State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, PR China. Electronic address: yfzhang@dlut.edu.cn.

PMID: 36509036
DOI: 10.1016/j.jcis.2022.11.153

Abstract

Aqueous zinc-ion batteries (AZIBs) are regarded as attractive candidates for next-generation energy storage devices. Among various cathode materials, V₂O₅·nH₂O (VOH) possesses a high theoretical capacity but poor cycle stability due to the susceptibility of its open structure to damage by the quick shuttling of Zn²⁺. Herein, the structural stability of VOH is directly improved by wrapping polyaniline (PANI) on the VOH nanobelts (VOH@PANI). As a cathode material for AZIBs, the VOH nanobelts@PANI core-shell structures exhibit an outstanding cycle stability of 98% after 2000 cycles at 2 A g^-1. The improved conductivity and additional energy storage contribution of the PANI endow VOH@PANI with a specific capacity as high as 440 mAh g^-1 at 0.1 A g^-1, substantially higher than pure VOH (291 mAh g^-1). At the same time, high energy and power densities of 349 Wh kg^-1 and 3347 W kg^-1 are achieved. This work not only demonstrates that p-type doped PANI coatings on VOH can boost the Zn²⁺ storage of VOH, but also provides a novel method to enhance cathode materials for high electrochemical performance.

Keywords: Aqueous zinc-ion battery; Core-shell structure; Protonated polyaniline; V(2)O(5)·nH(2)O.