CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
In Situ Electrochemical XAFS Studies on an Iron Fluoride High-Capacity Cathode Material for Rechargeable Lithium Batteries
Zhang, Wei; Duchesne, Paul N.; Gong, Zheng-Liang; Wu, Shun-Qing; Ma, Lin; Jiang, Zheng; Zhang, Shuo; Zhang, Peng; Mi, Jin-Xiao; Yang, Yong
2013
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
ISSN1932-7447
Volume117Issue:22Pages:CONCATENATE(Sheet1!I163,-Sheet1!J163)
AbstractThe reactions and structural evolution of FeF3 during cell cycling are investigated in an in situ cell by using Fe K-edge X-ray absorption fine-structure (XAFS) spectroscopy. The results of X-ray absorption near-edge structure spectroscopic analysis demonstrate that there are three stages in the reaction of FeF3 with Li: (1) a two-phase intercalation reaction in the range of x = 0 to 0.46 Li, (2) a single-phase intercalation reaction in the range of x = 0.46 to 0.92 Li, and (3) a conversion reaction in the range of x = 0.92 to 2.78 Li. The coordination numbers (CNs) and bond lengths of the Fe-F bonds or Fe-Fe bonds for the lithiated FeF3 are obtained by performing XAFS fitting. The splitting trends of the Fe-F bond lengths and the Fe-F CNs in the range of x = 0 to 0.92 Li support the proposal that R-3c-structured FeF3 is transformed into R3c-structured Li0.92FeF3 after the intercalation of 0.92 equiv. of Li, and that the intermediate Li0.46FeF3 may be R3-structured. The small Fe-Fe CN of Li2.78FeF3 indicates that the average diameter of the Fe crystallites formed during discharge is <1 nm.
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000320214800006
Citation statistics
Cited Times:37[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13777
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Zhang, Wei,Duchesne, Paul N.,Gong, Zheng-Liang,et al. In Situ Electrochemical XAFS Studies on an Iron Fluoride High-Capacity Cathode Material for Rechargeable Lithium Batteries[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2013,117(22):CONCATENATE(Sheet1!I163,-Sheet1!J163).
APA Zhang, Wei.,Duchesne, Paul N..,Gong, Zheng-Liang.,Wu, Shun-Qing.,Ma, Lin.,...&Yang, Yong.(2013).In Situ Electrochemical XAFS Studies on an Iron Fluoride High-Capacity Cathode Material for Rechargeable Lithium Batteries.JOURNAL OF PHYSICAL CHEMISTRY C,117(22),CONCATENATE(Sheet1!I163,-Sheet1!J163).
MLA Zhang, Wei,et al."In Situ Electrochemical XAFS Studies on an Iron Fluoride High-Capacity Cathode Material for Rechargeable Lithium Batteries".JOURNAL OF PHYSICAL CHEMISTRY C 117.22(2013):CONCATENATE(Sheet1!I163,-Sheet1!J163).
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