2013年1月
Charge compensation mechanisms in Li1.16Ni0.15Co0.19Mn0.50O2 positive electrode material for Li-ion batteries analyzed by a combination of hard and soft X-ray absorption near edge structure
JOURNAL OF POWER SOURCES
- 巻
- 222
- 号
- 開始ページ
- 45
- 終了ページ
- 51
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.jpowsour.2012.08.023
- 出版者・発行元
- ELSEVIER SCIENCE BV
The redox reaction of Li1.16Ni0.15Co0.19Mn0.50O2 positive electrode material during the charging and discharging processes was investigated by using spectroscopic methods, i.e. in situ hard X-ray absorption near edge structure (XANES) at transition metal K-edges and ex situ soft XANES at oxygen K- and transition metal L-edges. The spectral changes of constituent elements during the initial charging to 4.5 V vs. Li/Li+ are quite similar to those of conventional layer-structured positive materials, such as LiNi1/3Mn1/3Co1/3O2 center dot Ni2+ and Co3+ ions are fully oxidized to Ni4+ and Co4+, while Mn4+ remains unchanged. Ligand oxygen ions also take part in charge compensation. In the process of charging to 4.8 V via the plateau voltage region, no significant spectral change appears except partial reduction of Ni and Co ions in spite of lithium extraction. By discharging to 2.0 V the spectra of each element return to those of the pristine material. (c) 2012 Elsevier B.V. All rights reserved.
- リンク情報
-
- DOI
- https://doi.org/10.1016/j.jpowsour.2012.08.023
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000311129900007&DestApp=WOS_CPL
- URL
- http://www.scopus.com/inward/record.url?eid=2-s2.0-84866056714&partnerID=MN8TOARS
- URL
- http://orcid.org/0000-0002-1491-2647
- ID情報
-
- DOI : 10.1016/j.jpowsour.2012.08.023
- ISSN : 0378-7753
- eISSN : 1873-2755
- ORCIDのPut Code : 42857472
- SCOPUS ID : 84866056714
- Web of Science ID : WOS:000311129900007