"Triple-synergistic effect" of K+ and PANI co-intercalation enabling the high-rate capability and stability of V2O5 for aqueous zinc-ion batteries

Ping Luo; Gongtao Yu; Wenwei Zhang; Han Tang; Dongyao Zhu; Feiyang Chao; Wenhui Zhong; Shijie Dong; Qinyou An

doi:10.1016/j.jcis.2023.12.167

"Triple-synergistic effect" of K⁺ and PANI co-intercalation enabling the high-rate capability and stability of V₂O₅ for aqueous zinc-ion batteries

J Colloid Interface Sci. 2024 Apr:659:267-275. doi: 10.1016/j.jcis.2023.12.167. Epub 2023 Dec 30.

Authors

Ping Luo¹, Gongtao Yu², Wenwei Zhang³, Han Tang², Dongyao Zhu², Feiyang Chao², Wenhui Zhong², Shijie Dong¹, Qinyou An⁴

Affiliations

¹ Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System, Hubei Provincial Key Laboratory of Green Materials for Light Industry, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei Engineering Laboratory of Automotive Lightweight Materials and Processing, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, PR China; Hubei Longzhong Laboratory, Hubei University of Technology, 441000 Xiangyang, Hubei, PR China.
² Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System, Hubei Provincial Key Laboratory of Green Materials for Light Industry, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei Engineering Laboratory of Automotive Lightweight Materials and Processing, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, PR China.
³ State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China.
⁴ State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China. Electronic address: anqinyou86@whut.edu.cn.

PMID: 38176236
DOI: 10.1016/j.jcis.2023.12.167

Abstract

Vanadium-based materials are widely recognized as the primary candidate cathode materials for aqueous Zn-ion batteries (AZIBs). However, slow kinetics and poor stability pose significant challenges for widespread application. Herein, to address these issues, alkali metal ions and polyaniline (PANI) are introduced into layered hydrated V₂O₅ (VO). Density functional theory calculations reveal that the synthesized (C₆H₄NH)_0.27K_0.24V₂O₅·0.92H₂O (KPVO), with K⁺ and PANI co-intercalation, exhibits a robust interlayer structure and a continuous three-dimensional (3D) electron transfer network. These properties facilitate the reversible diffusion of Zn²⁺ with a low migration potential barrier and rapid response kinetics. The KPVO cathode exhibits a discharge specific capacity of 418.3 mAh/g at 100 mA/g and excellent cycling stability with 89.5 % retention after 3000 cycles at 5 A/g. This work provides a general strategy for integrating cathode materials to achieve high specific capacity and excellent kinetic performance.

Keywords: 3D electron conduction network; Aqueous zinc-ion battery; Density functional theory calculations; Vanadium-based materials.