Size-Dependent Staging and Phase Transition in LiFePO4/FePO4

CORC > 物理研究所 > 物理所公开发表论文 > 期刊论文

	Size-Dependent Staging and Phase Transition in LiFePO4/FePO4
	Zhu, CB ; Gu, L ; Suo, LM ; Popovic, J ; Li, H ; Ikuhara, Y ; Maier, J
刊名	ADVANCED FUNCTIONAL MATERIALS
	2014
卷号	24 期号:3 页码:312
关键词	phase transition staging effect size-dependent
ISSN号	1616-301X
通讯作者	Zhu, CB (reprint author), Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany.
中文摘要	The LiFePO4/FePO4 phase transition process is remarkable in terms of its excellent reversibility, making this redox system extremely promising for high rate lithium storage. The recent observation of ordering effects (Li0.5FePO4) during the phase transition challenges the traditional two phase models. In this work, the phenomenon of staging for LiFePO4 for different sizes (70 nm and 50 nm) by high resolution aberration corrected annular bright electron microscopy is detected, investigated, and discussed along with previous results on larger crystals. In the small crystals, staging is found throughout with a decrease of order from center to the surface. For the larger crystal, a staging phase occurs constituting the interfacial zone (width around 15 nm) between LiFePO4 and FePO4. A comparison is made to recent experiments on even larger crystals showing such an interphase of smaller extent (around 2 nm). Thus it appears that these zones narrow with increasing size. These findings are discussed in the light of phase transition thermodynamics and kinetics. In particular, the possibility is discussed that the staging interphase may constitute a low energy solution to the LiFePO4/FePO4 contact.
资助信息	Chinese Academy of Sciences; National Natural Science Foundation of China (NSFC) [11174334]; CAS [KJCX2-YW-W26]
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/311004/58827]
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	Zhu, CB,Gu, L,Suo, LM,et al. Size-Dependent Staging and Phase Transition in LiFePO4/FePO4[J]. ADVANCED FUNCTIONAL MATERIALS,2014,24(3):312.
APA	Zhu, CB.,Gu, L.,Suo, LM.,Popovic, J.,Li, H.,...&Maier, J.(2014).Size-Dependent Staging and Phase Transition in LiFePO4/FePO4.ADVANCED FUNCTIONAL MATERIALS,24(3),312.
MLA	Zhu, CB,et al."Size-Dependent Staging and Phase Transition in LiFePO4/FePO4".ADVANCED FUNCTIONAL MATERIALS 24.3(2014):312.