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Understanding the High Capacity of Li2FeSiO4: In Situ XRD/XANES Study Combined with First-Principles Calculations
Lv, Dongping; Bai, Jingyu; Zhang, Peng; Wu, Shunqing; Li, Yixiao; Wen, Wen; Jiang, Zheng; Mi, Jinxiao; Zhu, Zizhong; Yang, Yong
2013
Source PublicationCHEMISTRY OF MATERIALS
ISSN0897-4756
Volume25Issue:10Pages:CONCATENATE(Sheet1!I385,-Sheet1!J385)
AbstractThe electrochemical mechanism of the cathode material Li2FeSiO4 with reversible extraction/insertion of more than one Li+ from/into the structure has been studied by techniques of in situ synchrotron X-ray absorption near edge structure (XANES) and X-ray diffraction (XRD). These advanced techniques provide effective solutions to address the limitations of characterization by traditional ex situ methods. The study of in situ Fe Kedge XANES indicates that the Fe ion in the Li2FeSiO4 is oxidized continuously to high valence during the charging process from open circuit potential to 4.8 V, which contributes to the high reversible capacities of the materials. In situ XRD and theoretical study from first-principles calculations have been employed to reveal the structural evolution of the Li2FeSiO4 underlying the high capacity during the charge/discharge process. The results of both experimental and theoretical studies are consistent and indicate that Li2FeSiO4 undergoes two two-phase reactions when the electrode is charged to a high voltage of 4.8 V.
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000319856000002
Citation statistics
Cited Times:65[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13979
Collection中科院上海应用物理研究所2011-2020年
Recommended Citation
GB/T 7714
Lv, Dongping,Bai, Jingyu,Zhang, Peng,et al. Understanding the High Capacity of Li2FeSiO4: In Situ XRD/XANES Study Combined with First-Principles Calculations[J]. CHEMISTRY OF MATERIALS,2013,25(10):CONCATENATE(Sheet1!I385,-Sheet1!J385).
APA Lv, Dongping.,Bai, Jingyu.,Zhang, Peng.,Wu, Shunqing.,Li, Yixiao.,...&Yang, Yong.(2013).Understanding the High Capacity of Li2FeSiO4: In Situ XRD/XANES Study Combined with First-Principles Calculations.CHEMISTRY OF MATERIALS,25(10),CONCATENATE(Sheet1!I385,-Sheet1!J385).
MLA Lv, Dongping,et al."Understanding the High Capacity of Li2FeSiO4: In Situ XRD/XANES Study Combined with First-Principles Calculations".CHEMISTRY OF MATERIALS 25.10(2013):CONCATENATE(Sheet1!I385,-Sheet1!J385).
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