Boosting the rate capability of multichannel porous TiO2 nanofibers with well-dispersed Cu nanodots and Cu2+-doping derived oxygen vacancies for sodium-ion batteries

doi:10.1007/s12274-018-2248-9

	Boosting the rate capability of multichannel porous TiO2 nanofibers with well-dispersed Cu nanodots and Cu2+-doping derived oxygen vacancies for sodium-ion batteries
	Wu, Ying 2; Wei, Zengxi 3; Xu, Rui 2; Gong, Yue 4; Gu, Lin 4,5; Ma, Jianmin 3; Yu, Yan 1,2,6
刊名	NANO RESEARCH
	2019-09-01
卷号	12 期号:9 页码:2211-2217
关键词	multichannel porous TiO2 nanofibers Cu nanodots Cu2+ doping sodium ion batteries density functional theory (DFT) calculations
ISSN号	1998-0124
DOI	10.1007/s12274-018-2248-9
通讯作者	Yu, Yan(yanyumse@ustc.edu.cn)
英文摘要	The use of TiO2 as an anode in rechargeable sodium-ion batteries (NIBs) is hampered by intrinsic low electronic conductivity of TiO2 and inferior electrode kinetics. Here, a high-performance TiO2 electrode for NIBs is presented by designing a multichannel porous TiO2 nanofibers with well-dispersed Cu nanodots and Cu2+-doping derived oxygen vacancies (Cu-MPTO). The in-situ grown well-dispersed copper nanodots of about 3 nm on TiO2 surface could significantly enhance electronic conductivity of the TiO2 fibers. The one-dimensional multichannel porous structure could facilitate the electrolyte to soak in, leading to short transport path of Na+ through carbon toward the TiO2 nanoparticle. The Cu2+-doping induced oxygen vacancies could decrease the bandgap of TiO2, resulting in easy electron trapping. With this strategy, the Cu-MPTO electrodes render an outstanding rate performance for NIBs (120 mAh center dot g(-1) at 20 C) and a superior cycling stability for ultralong cycle life (120 mAh center dot g(-1) at 20 C and 96.5% retention over 2,000 cycles). Density functional theory (DFT) calculations also suggest that Cu2+ doping can enhance the conductivity and electron transfer of TiO2 and lower the sodiation energy barrier. This strategy is confirmed to be a general process and could be extended to improve the performance of other materials with low electronic conductivity applied in energy storage systems.
资助项目	National Key R&D Research Program of China[2018YFB0905400] ; National Key R&D Research Program of China[2016YFB0100305] ; National Natural Science Foundation of China[51622210] ; National Natural Science Foundation of China[51872277] ; Fundamental Research Funds for the Central Universities[WK3430000004] ; DNL cooperation Fund, CAS[DNL180310]
WOS关键词	PERFORMANCE ANODE MATERIAL ; EFFICIENT HYDROGEN EVOLUTION ; ENERGY-STORAGE ; AG NANOPARTICLES ; AT-C ; LITHIUM ; ANATASE ; NANOCRYSTALS ; COMPOSITES ; REDUCTION
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	TSINGHUA UNIV PRESS
WOS记录号	WOS:000485041800018
资助机构	National Key R&D Research Program of China ; National Key R&D Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; DNL cooperation Fund, CAS ; DNL cooperation Fund, CAS ; National Key R&D Research Program of China ; National Key R&D Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; DNL cooperation Fund, CAS ; DNL cooperation Fund, CAS ; National Key R&D Research Program of China ; National Key R&D Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; DNL cooperation Fund, CAS ; DNL cooperation Fund, CAS ; National Key R&D Research Program of China ; National Key R&D Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; DNL cooperation Fund, CAS ; DNL cooperation Fund, CAS
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/172957]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Yu, Yan
作者单位	1.Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China 2.Univ Sci & Technol China, CAS, Key Lab Mat Energy Convers, Dept Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China 3.Hunan Univ, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China 4.Chinese Acad Sci, Inst Phys, Beijing Lab Elect Microscopy, Beijing 100190, Peoples R China 5.Collaborat Innovat Ctr Quantum Matter, Beijing 100190, Peoples R China 6.Chinese Acad Sci, Dalian Natl Lab Clean Energy DNL, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Wu, Ying,Wei, Zengxi,Xu, Rui,et al. Boosting the rate capability of multichannel porous TiO2 nanofibers with well-dispersed Cu nanodots and Cu2+-doping derived oxygen vacancies for sodium-ion batteries[J]. NANO RESEARCH,2019,12(9):2211-2217.
APA	Wu, Ying.,Wei, Zengxi.,Xu, Rui.,Gong, Yue.,Gu, Lin.,...&Yu, Yan.(2019).Boosting the rate capability of multichannel porous TiO2 nanofibers with well-dispersed Cu nanodots and Cu2+-doping derived oxygen vacancies for sodium-ion batteries.NANO RESEARCH,12(9),2211-2217.
MLA	Wu, Ying,et al."Boosting the rate capability of multichannel porous TiO2 nanofibers with well-dispersed Cu nanodots and Cu2+-doping derived oxygen vacancies for sodium-ion batteries".NANO RESEARCH 12.9(2019):2211-2217.