Understanding the Lithium Storage Mechanism of Ti3C2TX MXene

doi:10.1021/acs.jpcc.8b10790

IMR OpenIR

	Understanding the Lithium Storage Mechanism of Ti3C2TX MXene
	Cheng, Renfei 1,2; Hu, Tao 1,3,4; Zhang, Hui 5; Wang, Chunmei 1,2; Hu, Minmin 1,2; Yang, Jinxing 1,2; Cui, Cong 1,2; Guang, Tianjia 1,2; Li, Changji 1; Shi, Chao 1; Hou, Pengxiang 1; Wang, Xiaohui 1
通讯作者	Wang, Xiaohui(wang@imr.ac.cn)
	2019-01-17
发表期刊	JOURNAL OF PHYSICAL CHEMISTRY C
ISSN	1932-7447
卷号	123 期号:2 页码:1099-1109
摘要	MXenes, as an emerging family of conductive two-dimensional materials, hold promise for late-model electrode materials in Li-ion batteries. A primary challenge hindering the development of MXenes as electrode materials is that a complete understanding of the intrinsic storage mechanism underlying the charge/discharge behavior remains elusive. This article presents two key discoveries: first, the characteristics of the Ti3C2TX structure can be modified systematically by calcination in various atmospheres, and second, these structural changes greatly affect Li-ion storage behavior, which reveals the mechanism for lithium storage in Ti3C2TX MXene. Specifically, via ammonization, the interlayer spacing gets dilated and uniform, giving rise to only one redox couple. In stark contrast, there are two well-recognized redox couples corresponding to two interlayer spacings in pristine Ti3C2TX MXene, in which Li-ion (de)intercalation occurs between interlayers in a sequential manner as evidenced by ex situ X-ray diffraction (XRD). Notably, the XRD diffraction peaks shift hardly in the whole range of charge/discharge voltage, indicating a zero-strain feature upon Li-ion (de)intercalation. Moreover, the diffusion-controlled contribution percentage to capacity inversely depends on the scan rate. The understanding suggests a new design principle of the MXene anode: reduced lateral size to shorten the diffusion path and dilated interlayer spacing.
资助者	Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) ; Shenyang National Laboratory for Materials Science, Institute of Metal Research, CAS ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (second phase)
DOI	10.1021/acs.jpcc.8b10790
收录类别	SCI
语种	英语
资助项目	Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS)[2011152] ; Shenyang National Laboratory for Materials Science, Institute of Metal Research, CAS[2017RP06] ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (second phase)[U1501501]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000456350600013
出版者	AMER CHEMICAL SOC
引用统计	被引频次：124[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/131245
专题	中国科学院金属研究所
通讯作者	Wang, Xiaohui
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Suzhou Univ Sci & Technol, Inst Mat Sci & Devices, Suzhou 215009, Peoples R China 5.Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia
推荐引用方式 GB/T 7714	Cheng, Renfei,Hu, Tao,Zhang, Hui,et al. Understanding the Lithium Storage Mechanism of Ti3C2TX MXene[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2019,123(2):1099-1109.
APA	Cheng, Renfei.,Hu, Tao.,Zhang, Hui.,Wang, Chunmei.,Hu, Minmin.,...&Wang, Xiaohui.(2019).Understanding the Lithium Storage Mechanism of Ti3C2TX MXene.JOURNAL OF PHYSICAL CHEMISTRY C,123(2),1099-1109.
MLA	Cheng, Renfei,et al."Understanding the Lithium Storage Mechanism of Ti3C2TX MXene".JOURNAL OF PHYSICAL CHEMISTRY C 123.2(2019):1099-1109.