Chao Dongliang, Zhou Wanhai, Ye Chao, Zhang Qinghua, Chen Yungui, Gu Lin, Davey Kenneth, Qiao Shi-Zhang
School of Chemical Engineering, The University of Adelaide, Adelaide, SA, 5005, Australia.
Institute of New Energy and Low Carbon Technology, Sichuan University, Chengdu, 610065, China.
Angew Chem Int Ed Engl. 2019 Jun 3;58(23):7823-7828. doi: 10.1002/anie.201904174. Epub 2019 May 2.
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 MnO electrolysis process in a conventional Zn-ion battery, and report a new electrolytic Zn-MnO system, via enabled proton and electron dynamics, that maximizes the electrolysis process. Compared with other Zn-based electrochemical devices, this new electrolytic Zn-MnO battery has a record-high output voltage of 1.95 V and an imposing gravimetric capacity of about 570 mAh g , together with a record energy density of approximately 409 Wh kg 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.
基于锌的电化学因其在低成本和高安全性方面的独特性而在实际储能领域备受关注。然而，与更传统的锂离子电池相比，其在电网规模应用中受到输出电压有限和能量密度不足的困扰。在此，我们提出了一种传统锌离子电池中的潜在高压MnO电解过程，并报告了一种新的电解Zn-MnO系统，通过实现质子和电子动力学，使电解过程最大化。与其他基于锌的电化学装置相比，这种新型电解Zn-MnO电池具有创纪录的1.95 V输出电压和约570 mAh g的可观重量容量，当同时考虑阳极和阴极活性材料时，能量密度约为409 Wh kg。保守估计成本低于每千瓦时10美元。这一结果为锌基电池的发展开辟了新机遇，对于低成本实际储能和电网规模应用应具有直接益处。
