Surface modification of manganese monoxide through chemical vapor deposition to attain high energy storage performance for aqueous zinc-ion batteries

Junjian Zhai; Junfeng Yan; Gang Wang; Sifan Chen; Di Jin; Han Zhang; Wu Zhao; Zhiyong Zhang; Weiguang Huang

doi:10.1016/j.jcis.2021.05.142

Surface modification of manganese monoxide through chemical vapor deposition to attain high energy storage performance for aqueous zinc-ion batteries

J Colloid Interface Sci. 2021 Nov:601:617-625. doi: 10.1016/j.jcis.2021.05.142. Epub 2021 May 26.

Authors

Junjian Zhai¹, Junfeng Yan², Gang Wang³, Sifan Chen¹, Di Jin¹, Han Zhang¹, Wu Zhao¹, Zhiyong Zhang¹, Weiguang Huang¹

Affiliations

¹ School of Information Science and Technology, Northwest University, Xi'an 710127, PR China.
² School of Information Science and Technology, Northwest University, Xi'an 710127, PR China. Electronic address: yanjf@nwu.edu.cn.
³ Institute of Photonics & Photon-Technology, Northwest University, Xi'an 710127, PR China; Shaanxi Joint Lab of Graphene (NWU), Xi'an 710127, PR China. Electronic address: gangwang@nwu.edu.cn.

PMID: 34091309
DOI: 10.1016/j.jcis.2021.05.142

Abstract

Surface modification of the manganese-based oxide electrode is considered to be a viable strategy to improve electrochemical property in aqueous zinc-ion batteries (ZIBs). However, the modification method through traditional wet-chemical technology can hardly to satisfy high rate capability for aqueous ZIBs due to unhomogeneous and nonconformal coating originates from surface energy mismatch. Herein, a surface modification strategy based on chemical vapor deposition is developed to enhance the electrochemical property of the inactive MnO in aqueous ZIBs. The constructed carbon coating modified MnO electrode shows excellent reversible capacity and superior rate capability with remarkable energy density of 351 Wh kg^-1 at 625 W kg^-1. The energy storage mechanism of the electrode during the charge and discharge processes is elucidated according to the ex-situ measurements of X-ray diffraction and photoelectron spectroscopy, Fourier transform infrared spectra, and galvanostatic intermittent titration techniques. Moreover, soft-packaged batteries are fabricated with the carbon coating modified MnO, which shows great promises for the practical application of the material. The work paves the way for the exploitation of high performance surface-modified electrode through chemical vapor deposition for aqueous ZIBs.

Keywords: Aqueous zinc-ion batteries; Carbon coating; Chemical vapor deposition; Manganese monoxide; Surface modification.