An Electrolytic Zn–MnO2 Battery for High‐Voltage and Scalable Energy Storage

Zinc‐based electrochemistry is attracting significant attention for practical energy storage owing to its uniqueness in terms of low cost and high safety. However, the grid‐scale application is plagued by limited output voltage and inadequate energy density when compared with more conventional Li‐io...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2019-06, Vol.58 (23), p.7823-7828
Main Authors: Chao, Dongliang, Zhou, Wanhai, Ye, Chao, Zhang, Qinghua, Chen, Yungui, Gu, Lin, Davey, Kenneth, Qiao, Shi‐Zhang
Format: Article
Language:English
Subjects:
Electric potential
Electrochemistry
Electrolysis
electrolytic batteries
Energy storage
Flux density
Gravimetry
Lithium-ion batteries
Manganese dioxide
manganese oxide
Voltage
Zinc
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Summary:Zinc‐based electrochemistry is attracting significant attention for practical energy storage owing to its uniqueness in terms of low cost and high safety. However, the grid‐scale application is plagued by limited output voltage and inadequate energy density when compared with more conventional Li‐ion batteries. Herein, we propose a latent high‐voltage MnO2 electrolysis process in a conventional Zn‐ion battery, and report a new electrolytic Zn–MnO2 system, via enabled proton and electron dynamics, that maximizes the electrolysis process. Compared with other Zn‐based electrochemical devices, this new electrolytic Zn–MnO2 battery has a record‐high output voltage of 1.95 V and an imposing gravimetric capacity of about 570 mAh g−1, together with a record energy density of approximately 409 Wh kg−1 when both anode and cathode active materials are taken into consideration. The cost was conservatively estimated at
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201904174