BiFeO3 as Electrode Material for Lithium Batteries

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	BiFeO3 as Electrode Material for Lithium Batteries
	Luo Shihai ; Gao Mei（郭威） ; Chen Jun ; Xing Xianran ; Li Zhong（黎忠） ; Zhou Xingtai（周兴泰） ; Wen Wen
刊名	JOURNAL OF NEW MATERIALS FOR ELECTROCHEMICAL SYSTEMS
	2011
卷号	14 期号:3 页码:141
ISSN号	1480-2422
英文摘要	BiFeO3 was studied as electrode material for lithium battery applications. The voltage profile of BiFeO3 vs Li battery displays three discharge plateaus around 1.3, 0.7 and 0.4 V (vs Li/Li+) and the first discharge capacity is about 1000 mAh/g, with a cutoff voltage of 0.05 V. If the cutoff voltage is limited to 0.7 V, much better capacity retention is achieved The structural changes of BiFeO3 during electro-chemical cycling process were investigated using synchrotron-based in situ XRD and XANES Lithium ions were inserted into BiFeO3 during the discharge process. The whiteline of Bi L-III-edge XANES spectra gradually decreased during the discharge process with their L-III, edge position concomitantly shifted towards lower energy position. However, the Fe K-edge XANES spectrum of the fully discharged product is similar to that of the pristine one and displays no shifts. This indicates that Bi ions are responsible for charge transfer during the electrochemical cycling process. The reduction of Bi3+ to Bi-0 as the gradual insertion of Li ions, is a three-step reduction process. Li2Bi alloy formation was observed at the end of the discharge process, which is not fully reversible towards lithium intercalation/extraction and decomposes to metallic Bi.
收录类别	SCI
语种	英语
WOS记录号	WOS:000293726700001
公开日期	2012-07-04
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/9464]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Luo Shihai,Gao Mei,Chen Jun,et al. BiFeO3 as Electrode Material for Lithium Batteries[J]. JOURNAL OF NEW MATERIALS FOR ELECTROCHEMICAL SYSTEMS,2011,14(3):141.
APA	Luo Shihai.,Gao Mei.,Chen Jun.,Xing Xianran.,Li Zhong.,...&Wen Wen.(2011).BiFeO3 as Electrode Material for Lithium Batteries.JOURNAL OF NEW MATERIALS FOR ELECTROCHEMICAL SYSTEMS,14(3),141.
MLA	Luo Shihai,et al."BiFeO3 as Electrode Material for Lithium Batteries".JOURNAL OF NEW MATERIALS FOR ELECTROCHEMICAL SYSTEMS 14.3(2011):141.