Interfacial Design for a 4.6 V High-Voltage Single-Crystalline LiCoO2 Cathode

Bibliographische Detailangaben
Veröffentlicht in:	Advanced materials (Deerfield Beach, Fla.). - 1998. - 34(2022), 8 vom: 27. Feb., Seite e2108353
1. Verfasser:	Zhang, Jiaxun (VerfasserIn)
Weitere Verfasser:	Wang, Peng-Fei, Bai, Panxing, Wan, Hongli, Liu, Sufu, Hou, Singyuk, Pu, Xiangjun, Xia, Jiale, Zhang, Weiran, Wang, Zeyi, Nan, Bo, Zhang, Xiyue, Xu, Jijian, Wang, Chunsheng
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2022
Zugriff auf das übergeordnete Werk:	Advanced materials (Deerfield Beach, Fla.)
Schlagworte:	Journal Article high-voltage LiCoO2 cathodes inorganic-rich cathode electrolyte interphase nonflammable electrolytes single-crystalline cathodes

Beschreibung
Zusammenfassung:	© 2022 Wiley-VCH GmbH. Single-crystalline cathode materials have attracted intensive interest in offering greater capacity retention than their polycrystalline counterparts by reducing material surfaces and phase boundaries. However, the single-crystalline LiCoO2 suffers severe structural instability and capacity fading when charged to high voltages (4.6 V) due to Co element dissolution and O loss, crack formation, and subsequent electrolyte penetration. Herein, by forming a robust cathode electrolyte interphase (CEI) in an all-fluorinated electrolyte, reversible planar gliding along the (003) plane in a single-crystalline LiCoO2 cathode is protected due to the prevention of element dissolution and electrolyte penetration. The robust CEI effectively controls the performance fading issue of the single-crystalline cathode at a high operating voltage of 4.6 V, providing new insights for improved electrolyte design of high-energy-density battery cathode materials
Beschreibung:	Date Revised 24.02.2022 published: Print-Electronic Citation Status PubMed-not-MEDLINE
ISSN:	1521-4095
DOI:	10.1002/adma.202108353