| Autor: |
Wang, Dingming, Du, Xiaofan, Chen, Guansheng, Song, Fuchen, Du, Jiahao, Zhao, Jingwen, Ma, Yinglei, Wang, Jia, Du, Aobing, Cui, Zili, Zhou, Xinhong, Cui, Guanglei |
| Předmět: |
|
| Zdroj: |
Angewandte Chemie International Edition; 3/27/2023, Vol. 62 Issue 14, p1-7, 7p |
| Abstrakt: |
Magnesium (Mg) metal secondary batteries have attracted much attention for their high safety and high energy density characteristics. However, the significant issues of the cathode/electrolyte interphase (CEI) in Mg batteries are still being ignored. In this work, a significant CEI layer on the typical Mo6S8 cathode surface has been unprecedentedly constructed through the oxidation of the chloride‐free magnesium tetrakis(hexafluoroisopropyloxy)borate (Mg[B(hfip)4]2) salt under a proper charge cut‐off voltage condition. The CEI has been identified to contain BxOy effective species originating from the oxidation of [B(hfip)4]− anion. It is confirmed that the BxOy species is beneficial to the desolvation of solvated Mg2+, speeding up the interfacial Mg2+ transfer kinetics, thereby improving the Mg2+‐storage capability of Mo6S8 host. The firstly reported CEI in Mg batteries will give deeper insights into the interface issues in multivalent electrochemical systems. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Plný text