Interface Engineering of Aqueous Zinc/Manganese Dioxide Batteries with High Areal Capacity and Energy Density

Zhaoxi Shen; Yu Liu; Lei Luo; Jun Pu; Yu Ji; Junpeng Xie; Linsen Li; Chaowei Li; Yagang Yao; Guo Hong

doi:10.1002/smll.202204683

Interface Engineering of Aqueous Zinc/Manganese Dioxide Batteries with High Areal Capacity and Energy Density

Small. 2022 Dec;18(50):e2204683. doi: 10.1002/smll.202204683. Epub 2022 Oct 30.

Authors

Zhaoxi Shen^{1

2}, Yu Liu¹, Lei Luo¹, Jun Pu¹, Yu Ji¹, Junpeng Xie¹, Linsen Li³, Chaowei Li¹, Yagang Yao^{4

5}, Guo Hong¹

Affiliations

¹ Department of Materials Science and Engineering & Center of Super-Diamond and Advanced Films, College of Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, SAR, 999077, P. R. China.
² Institute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, College of Electronic Information and Optical Engineering, Nankai University, Tianjin, 300350, P. R. China.
³ College of Public Health, Hebei University, No. 342 Yuhua Rd., Baoding, 071002, P. R. China.
⁴ National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
⁵ Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Nanchang, 330200, P. R. China.

PMID: 36310129
DOI: 10.1002/smll.202204683

Abstract

Commercialization of aqueous batteries is mainly hampered by their low energy density, owing to the low mass loading of active cathode materials. In this work, a MnO₂ cathode structure (MnO₂ /CTF) is designed to modify the MnO₂ /collector interface for enhanced ion transportation properties. Such a cathode can achieve ultrahigh mass loading of MnO₂ , large areal capacity, and high energy density, with excellent cycling stability and rate performance. Specifically, a 0.15 mm thick MnO₂ /CTF cathode can realize a mass loading of 20 mg cm^-2 with almost 100% electrochemical conversion of MnO₂ , providing the maximum areal capacity of 12.08 mA h cm^-2 and energy density of 191 W h kg^-1 for Zn-MnO₂ /CTF batteries when considering both cathode and anode. Besides the conventional low energy demonstrations, such a Zn-MnO₂ /CTF battery is capable of realistic applications, such as mobile phones in our daily life, which is a promising alternative for wearable electronics.

Keywords: Zn/MnO 2 batteries; advanced cathodes; high areal capacity; high mass loading; interface engineering.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Electric Power Supplies
Manganese Compounds*
Oxides*
Zinc

Substances

manganese dioxide
Manganese Compounds
Oxides
Zinc