Synergistic combination of a Co-doped σ-MnO2 cathode with an electrolyte additive for a high-performance aqueous zinc-ion battery

Shuhua Yang; Le Zhang; Mengjiao Luo; Yanwei Cui; Jieqiang Wang; Degang Zhao; Chao Yang; Xiutong Wang; Bingqiang Cao

ChemPhysMater (Jan 2023)

Synergistic combination of a Co-doped σ-MnO2 cathode with an electrolyte additive for a high-performance aqueous zinc-ion battery

Shuhua Yang,
Le Zhang,
Mengjiao Luo,
Yanwei Cui,
Jieqiang Wang,
Degang Zhao,
Chao Yang,
Xiutong Wang,
Bingqiang Cao

Affiliations

Shuhua Yang: Materials Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, University of Jinan, Jinan 250022, China; Corresponding author.
Le Zhang: Materials Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, University of Jinan, Jinan 250022, China
Mengjiao Luo: Materials Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, University of Jinan, Jinan 250022, China
Yanwei Cui: Materials Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, University of Jinan, Jinan 250022, China
Jieqiang Wang: Materials Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, University of Jinan, Jinan 250022, China
Degang Zhao: Materials Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, University of Jinan, Jinan 250022, China
Chao Yang: School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China
Xiutong Wang: Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology and Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
Bingqiang Cao: Materials Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, University of Jinan, Jinan 250022, China; School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China

Journal volume & issue: Vol. 2, no. 1
pp. 77 – 82

Abstract

Read online

The key challenges in aqueous zinc-manganese dioxide batteries (MnO2//Zn) are their poor electrochemical kinetics and stability, which are mainly due to low conductivity and the inevitable dissolution of MnO2. A synergistic combination of a Co-doped σ-MnO2 electrode (Co-MnO2) and a Co(CH3COO)2•4H2O (CoAc) electrolyte additive is here developed to design a high-performance aqueous MnO2//Zn battery (denoted as a Co-MnO2//Zn battery with CoAc). The introduction of Co ions (Co3+/Co2+) into the σ-MnO2 electrode is achieved via a facile one-step electrodeposition method. Benefitting from the synergistic coupling effect of the Co-MnO2 electrode and the CoAc electrolyte additive, the fabricated Co-MnO2//Zn battery with CoAc shows a commendable discharge capacity of 313.8 mAh g−1 at 0.5 A g−1, excellent rate performance, excellent durability over 1000 cycles (∼ 92% capacity retention at 1.0 A g−1) and admirable energy density (439.3 Wh kg−1), which is a significant improvement compared with an un-doped σ-MnO2//Zn battery.

Published in ChemPhysMater

ISSN: 2097-0323 (Print); 2772-5715 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Science: Chemistry; Science: Physics
Website: https://www.keaipublishing.com/en/journals/chemphysmater/

About the journal

Abstract

Keywords