Operando Magnetometry Probing the Charge Storage Mechanism of CoO Lithium-Ion Batteries

Operando Magnetometry Probing the Charge Storage Mechanism of CoO Lithium-Ion Batteries

© 2021 Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 33(2021), 12 vom: 30. März, Seite e2006629
1. Verfasser: Li, Hongsen (VerfasserIn)
Weitere Verfasser: Hu, Zhengqiang, Xia, Qingtao, Zhang, Hao, Li, Zhaohui, Wang, Huaizhi, Li, Xiangkun, Zuo, Fengkai, Zhang, Fengling, Wang, Xiaoxiong, Ye, Wanneng, Li, Qinghao, Long, Yunze, Li, Qiang, Yan, Shishen, Liu, Xiaosong, Zhang, Xiaogang, Yu, Guihua, Miao, Guo-Xing
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article CoO charge storage mechanism lithium-ion batteries operando magnetometry
Beschreibung
Zusammenfassung:© 2021 Wiley-VCH GmbH.
Cobalt oxide (CoO) is a promising electrode for high-energy-density Li-ion batteries (LIBs), where the charge storage is believed to take place solely during the electrochemical oxidation/reduction processes. However, this simple picture has been increasingly challenged by reported anomalously large storage capacities, indicating the existence of undiscovered extra charge reservoirs inside the system. Here, an advanced operando magnetometry technology is employed to monitor the magnetization variation of the CoO LIBs in real time and, in this particular system, it is clearly demonstrated that the anomalous capacity is associated with both the reversible formation of a spin capacitor and the growth of a polymeric film at low voltages. Furthermore, operando magnetometry provides direct evidence of the catalytic role of metallic Co in assisting the polymeric film formation. These critical findings help pave the way for better understanding of the charge storage mechanisms of transition-metal oxides and further utilizing them to design novel electrode materials
Beschreibung:Date Revised 24.03.2021
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202006629