Remarkably Improved Electrode Performance of Bulk MnS by Forming a Solid Solution with FeS - Understanding the Li Storage Mechanism

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	Remarkably Improved Electrode Performance of Bulk MnS by Forming a Solid Solution with FeS - Understanding the Li Storage Mechanism
	Zhao, L ; Yu, XQ ; Yu, JZ ; Zhou, YN ; Ehrlich, SN ; Hu, YS ; Su, D ; Li, H ; Yang, XQ ; Chen, LQ
刊名	ADVANCED FUNCTIONAL MATERIALS
	2014
卷号	24 期号:35 页码:5557
ISSN号	1616-301X
通讯作者	Zhao, L (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing Key Lab New Energy Mat & Devices, Key Lab Renewable Energy,Inst Phys, Beijing 100190, Peoples R China.
中文摘要	Transition metal compounds based on conversion reactions are promising electrode materials for lithium-ion batteries due to their higher lithium storage capacity compared with currently available commercial battery electrodes. Most of the studies on these materials in the literature focus on transition metal oxides and fluorides, and not much work on transition metal sulphides has been reported, partially due to their relatively poor electrochemical performance. Here, synthesis and characterization of a series of solid solution FexMn1-xS (x = 0.2, 0.5, 0.8) monosulphide compounds is reported. Interestingly, hexagonal FeS and cubic MnS can form a solid solution of FexMn1-xS (x < 0.57). It is demonstrated that the lithium storage voltage can be tuned by changing the Fe concentration in the FexMn1-xS matrix; meanwhile, the discharge-charge coulombic efficiency and cycle stability of FexMn1-xS are greatly enhanced in comparison with that of pure MnS. A half cell using Fe0.5Mn0.5S as electrode material achieves a high first cycle coulombic efficiency of 78.0% and a high reversible capacity of ca. 477 mAh g(-1) after 35 cycles, while for pure MnS the first cycle coulombic efficiency is only 45.9% and the capacity rapidly fades to approximate to 200 mAh g(-1) after 15 cycles. Although the solid solution state of Fe0.5Mn0.5S cannot be retained during conversion reaction as indicated by X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), and transmission electron microscopy (TEM), the initial discharge "polarization", which has been considered as one of the major hurdles for conversion reaction, can be significantly reduced by this type of material design. In addition, the size and distribution of the nucleated nanophases might also be altered by the initial solid solution state of Fe0.5Mn0.5S, contributing to the improved electrochemical performance reported here.
资助信息	973 Projects [2010CB833102, 2012CB932900]; NSFC [51222210, 11234013]; "Strategic Priority Research Program" of the Chinese Academy of Sciences [XDA01020304]; One Hundred Talent Project of the Chinese Academy of Sciences; U. S. Department of Energy, Office of Vehicle Technologies [DEAC02-98CH10886]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/58824]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Zhao, L,Yu, XQ,Yu, JZ,et al. Remarkably Improved Electrode Performance of Bulk MnS by Forming a Solid Solution with FeS - Understanding the Li Storage Mechanism[J]. ADVANCED FUNCTIONAL MATERIALS,2014,24(35):5557.
APA	Zhao, L.,Yu, XQ.,Yu, JZ.,Zhou, YN.,Ehrlich, SN.,...&Chen, LQ.(2014).Remarkably Improved Electrode Performance of Bulk MnS by Forming a Solid Solution with FeS - Understanding the Li Storage Mechanism.ADVANCED FUNCTIONAL MATERIALS,24(35),5557.
MLA	Zhao, L,et al."Remarkably Improved Electrode Performance of Bulk MnS by Forming a Solid Solution with FeS - Understanding the Li Storage Mechanism".ADVANCED FUNCTIONAL MATERIALS 24.35(2014):5557.