Back to Search Start Over

Poly(3,4-ethylenedioxythiophene)-Coated Vanadium-Doped MnO2Nanorods for High-Performance Flexible Aqueous Zinc-Ion Battery Cathode

Authors :
Sun, Yuning
Huang, Changjun
Liu, Yuexin
Zhao, Xiaoli
Cai, Kefeng
Source :
ACS Applied Materials & Interfaces; October 2024, Vol. 16 Issue: 39 p52373-52382, 10p
Publication Year :
2024

Abstract

Manganese-based aqueous zinc-ion batteries (AZIBs) are considered promising cathode materials for large-scale energy storage applications due to their low cost and high safety. However, the primary constraints on achieving high specific capacity and cycling stability are the inherent low conductivity and suboptimal structural stability of the AZIB cathodes. Herein, we report a high-performance poly(3,4-ethylenedioxythiophene) (PEDOT)-coated vanadium-doped MnO2nanorod (NR) electrode for AZIBs. First, vanadium-doped MnO2(V-MnO2) NRs were synthesized by a simple hydrothermal synthesis method. The V-MnO2NRs were further encapsulated with a nanolayer of PEDOT through an in situpolymerization process, which was subsequently treated with sulfuric acid to achieve a smooth surface. The V doping creates oxygen vacancies within the MnO2, allowing for the rapid embedding and diffusion of Zn2+. The PEDOT nanolayer greatly enhances the conductivity and structural stability of the V-MnO2. Benefiting from the unique features, an optimal composite NRs electrode exhibits a high specific capacity of 250 mAh g–1at 0.4 A g–1, a high energy density (388 Wh kg–1at 151 W kg–1), and excellent stability over 5000 cycles at 3 A g–1. In addition, the flexible pouch cell assembled with the electrode shows good stability under bending. Given the positive outcomes, the material holds great potential for use as a cathode in next-generation flexible energy storage systems.

Details

Language :
English
ISSN :
19448244
Volume :
16
Issue :
39
Database :
Supplemental Index
Journal :
ACS Applied Materials & Interfaces
Publication Type :
Periodical
Accession number :
ejs67425566
Full Text :
https://doi.org/10.1021/acsami.4c10701