Development of High Areal Capacity Electrolytic MnO2-Zn Battery via an Iodine Mediator

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外文摘要：The commercialization of electrolytic MnO2-Zn batteries is highly applauded owing to the advantages of cost-effectiveness,high safety,high energy density,and durable working performance.However,due to the low reversibility of the cathode MnO2/Mn2+chemistry at high areal capacities and the severe Zn anode corrosion,the practical application of MnO2-Zn batteries is hampered by inadequate lifespan.Leveraging the full advantage of an iodine redox mediator,here we design a highly rechargeable electrolytic MnO2-Zn battery with a high areal capacity.The MnO2-Zn battery coupled with an iodine mediator in a mild electrolyte shows a high discharge voltage of 1.85 V and a robust areal capacity of 10 mAh cm-2 under a substantial discharge current density of 160 mA cm-2.The MnO2/l2-Zn battery with an areal capacity of 10 mAh cm-2 exhibits prolonged stability of over 950 cycles under a high-capacity retention of～94％.The scaled-up MnO2/I2-Zn battery reveals a stable cycle life under a cell capacity of～600 mAh.Moreover,our constructed MnO2/l2-Zn battery demonstrates a practical energy density of～37 Wh kg-1 and a competitive energy cost of＜18 US$ kWh-1 by taking into account the cathode,anode,and electrolyte.The MnO2/I2-Zn battery,with its remarkable reversibility and reasonable energy density,enlightens a new arena of large-scale energy storage devices.

外文关键词：

high areal capacityiodine redox mediatorlarge-scale energy storageMnO2-Zn battery

作者：

Xinhua Zheng、Ruihao Luo、Touqeer Ahmad、Jifei Sun、Shuang Liu、Na Chen、Mingming Wang、Yuan Yuan、Mingyan Chuai、Yan Xu、Taoli Jiang、Wei Chen

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作者单位：

Department of Applied Chemistry,School of Chemistry and Materials Science,Hefei National Research Center for Physical Sciences at the Microscale,University of Science and Technology of China,Hefei 230026 China

基金：

startup funds from USTCFundamental Research Funds for the Central UniversitiesUSTC Center for Micro and Nanoscale Research and FabricationSupercomputing Center of the USTC

项目编号：

KY2060000150WK2060000040

出版年：

2023

DOI：

10.1002/eem2.12433

能源与环境材料(英文)

CSCD

ISSN：

年,卷(期)：2023.6(6)

参考文献量46