Browse

New iron-based intercalation host for lithium-ion batteries

Cited 9 time in Web of Science Cited 8 time in Scopus
Authors
Jung, Sung-Kyun; Hwang, Insang; Cho, Sung-Pyo; Oh, Kyungbae; Ku, Kyojin; Choi, Il Rok; Kang, Kisuk
Issue Date
2018-03
Citation
Chemistry of Materials, Vol.30 No.6, pp.1956-1964
Abstract
The discovery of high-performance cathode materials is imperative for advances in current lithium-ion battery technology. Although extensive efforts have been focused on developing novel cathode materials, it has been a grand challenge to find candidates that can outperform state-of-the-art cathode materials such as layered, olivine, and spine] lithium transition-metal oxides. This issue arises because there are only a limited number of intercalation hosts with appropriate redox potential and lithium solubility. Here, we present a new iron-based intercalation host for lithium ion by exploring the "host formation reaction" from the nano composite of lithium and transition-metal compound hosts (i.e., LiF and FeO). Fluoride ions released from LiF decomposition during charging induce an unexpected phase transition of FeO to a new host structure of cubic-FeOF, a new polymorphic structure of FeOF that is different from the well-known rutile-FeOF. Cubic-FeOF electrode exhibits a higher redox potential (3.2 V) including lower voltage hysteresis and more extended stability of the structure than those of the rutile-FeOF undergoing partial lithiation followed by the conversion reaction. The discovery of new intercalation host from the host formation reaction of the nanocomposite suggests a new unexplored avenue in the development of novel cathode materials for lithium-ion batteries.
ISSN
0897-4756
URI
http://hdl.handle.net/10371/164976
DOI
https://doi.org/10.1021/acs.chemmater.7b05017
Files in This Item:
There are no files associated with this item.
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse