Stacking Faults Inducing Oxygen Anion Activities in Li2 MnO3

Bibliographische Detailangaben
Veröffentlicht in:	Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 22 vom: 01. Juni, Seite e2207904
1. Verfasser:	Wang, Boya (VerfasserIn)
Weitere Verfasser:	Zhuo, Zengqing, Li, Haifeng, Liu, Shiqi, Zhao, Shu, Zhang, Xu, Liu, Jue, Xiao, Dongdong, Yang, Wanli, Yu, Haijun
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2023
Zugriff auf das übergeordnete Werk:	Advanced materials (Deerfield Beach, Fla.)
Schlagworte:	Journal Article Li-ion batteries Li2MnO3 LiOLi bond angles oxygen anion activities stacking faults

Beschreibung
Zusammenfassung:	© 2023 Wiley-VCH GmbH. Controllable anionic redox for a transformational increase in the energy density is the pursuit of next generation Li-ion battery cathode materials. Its activation mechanism is coupled with the local coordination environment around O, which posts experimental challenges for control. Here, the tuning capability of anionic redox is shown by varying O local environment via experimentally controlling the density of stacking faults in Li2 MnO3 , the parent compound of Li-rich oxides. By combining computational analysis and spectroscopic study, it is quantitatively revealed that more stacking faults can trigger smaller LiOLi bond angles and larger LiO bond distance in local Li-rich environments and subsequently activate oxygen redox reactivity, which in turn enhances the reactivity of Mn upon the following reduction process. This study highlights the critical role of local structure environment in tuning the anionic reactivity, which provides guidance in designing high-capacity layered cathodes by appropriately adjusting stacking faults
Beschreibung:	Date Completed 01.06.2023 Date Revised 01.06.2023 published: Print-Electronic Citation Status PubMed-not-MEDLINE
ISSN:	1521-4095
DOI:	10.1002/adma.202207904