Mesoporous TiNb2O7 nanosheets anode with excellent rate capability and cycling performance in lithium ion half/full batteries

doi:10.1016/j.jpowsour.2022.231897

	Mesoporous TiNb2O7 nanosheets anode with excellent rate capability and cycling performance in lithium ion half/full batteries
	Liang, Dewei 3; Lu, Yu 3; Hu, Lei 3; Wang, Lili 3; Liang, Sheng 3; Liang, Xin 3; Liu, Lingli 3; Xu, Zezhong 3; Han, Chengliang 3; Liang, Changhao 1,2
刊名	JOURNAL OF POWER SOURCES
	2022-10-01
卷号	544
关键词	Lithium ion batteries TiNb2O7 nanosheets Mesoporous structure Synergistic effect Anode material
ISSN号	0378-7753
DOI	10.1016/j.jpowsour.2022.231897
通讯作者	Liang, Dewei(liangdw@hfuu.edu.cn) ; Liang, Changhao(chliang@issp.ac.cn)
英文摘要	The Wadsley-Roth phase TiNb2O7 has attracted considerable attention because of its high intercalation potential and excellent cycle capability. However, the poor electronic conductivity and sluggish ionic diffusion kinetics hinder its commercial application. Herein, a novel mesoporous TiNb2O7 nanosheet (MS-TNO) is fabricated via solvothermal and subsequent calcination process. Two-dimensional mesoporous nanostructures can effectively shorten transport path of lithium ions and enhance charge transfer. Galvanostatic intermittent titration technique (GITT) test shows the values of Li+ diffusion coefficient during discharge/charge vary in range of 10(- 12)-10(- 11) cm(2) S-1, indicating high efficient Li+ diffusion pathways in the lattice. In situ X-ray diffraction experiment elucidates the insertion/extraction of Li+ in MS-TNO is highly reversible, with a unit-cell volume change of 7.22% after Li+ insertion. Consequently, MS-TNO material delivers significant surface-controlled capacitive behavior and excellent electrochemical performances. These results clearly demonstrate that the MS-TNO is a promising anode material for rapid-charging, high capacity, safe and stable lithium ion batteries.
资助项目	National Natural Science Foundation of China[NSFC51902079] ; University Natural Sciences Research Project of Anhui Province[KJ2021A1013] ; University Natural Sciences Research Project of Anhui Province[KJ2021A1018] ; Anhui Provincial Natural Science Foundation[2008085QE271]
WOS关键词	ELECTROCHEMICAL PERFORMANCE ; SUPERIOR PERFORMANCE ; OXIDE ; MICROSPHERES ; ELECTRODE
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000847847600001
资助机构	National Natural Science Foundation of China ; University Natural Sciences Research Project of Anhui Province ; Anhui Provincial Natural Science Foundation
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131940]
专题	中国科学院合肥物质科学研究院
通讯作者	Liang, Dewei; Liang, Changhao
作者单位	1.Chinese Acad Sci, Inst Solid State Phys, Anhui Key Lab Nanomat & Nanotechnol, Hefei 230031, Peoples R China 2.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 3.Hefei Univ, Sch Energy Mat & Chem Engn, Hefei 230601, Peoples R China
推荐引用方式 GB/T 7714	Liang, Dewei,Lu, Yu,Hu, Lei,et al. Mesoporous TiNb2O7 nanosheets anode with excellent rate capability and cycling performance in lithium ion half/full batteries[J]. JOURNAL OF POWER SOURCES,2022,544.
APA	Liang, Dewei.,Lu, Yu.,Hu, Lei.,Wang, Lili.,Liang, Sheng.,...&Liang, Changhao.(2022).Mesoporous TiNb2O7 nanosheets anode with excellent rate capability and cycling performance in lithium ion half/full batteries.JOURNAL OF POWER SOURCES,544.
MLA	Liang, Dewei,et al."Mesoporous TiNb2O7 nanosheets anode with excellent rate capability and cycling performance in lithium ion half/full batteries".JOURNAL OF POWER SOURCES 544(2022).