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|Title:||An electrolytic Zn–MnO₂ battery for high-voltage and scalable energy storage|
|Other Titles:||An electrolytic Zn-MnO(2) battery for high-voltage and scalable energy storage|
|Citation:||Angewandte Chemie International Edition, 2019; 58(23):7823-7828|
|Dongliang Chao, Wanhai Zhou, Chao Ye, Qinghua Zhang, Yungui Chen, Lin Gu, Kenneth Davey, Shi‐Zhang Qiao|
|Abstract:||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 <US$ 10 per kWh. This result opens a new opportunity for the development of Zn-based batteries, and should be of immediate benefit for low-cost practical energy storage and grid-scale applications.|
|Keywords:||electrochemistry; electrolysis; electrolytic batteries; manganese oxide; zinc|
|Rights:||© 2019 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim.|
|Appears in Collections:||Chemical Engineering publications|
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