Ultrafast lithium storage in TiO2-bronze nanowires/N-doped graphene nanocomposites

doi:10.1039/c4ta06361a

QIBEBT-IR > 先进界面技术研究组

	Ultrafast lithium storage in TiO2-bronze nanowires/N-doped graphene nanocomposites
	Yan, Xiao1,2 ; Li, Yanjuan 3; Li, Malin 2; Jin, Yongcheng 1; Du, Fei 2; Chen, Gang 2,4; Wei, Yingjin 2
	2015
发表期刊	JOURNAL OF MATERIALS CHEMISTRY A
卷号	3 期号:8 页码:4180-4187
摘要	A TiO2-bronze/N-doped graphene nanocomposite (TiO2-B/NG) is prepared by a facile hydrothermal combined with hydrazine monohydrate vapor reduction method. The material exhibits macro-and meso-porosity with a high specific surface area of 163.4 m(2) g(-1). X-Ray photoelectron spectroscopy confirms the successful doping of nitrogen in the graphene sheets. In addition, the TiO2-B nanowires are substantially bonded to the NG sheets. Cyclic voltammetry and electrochemical impedance spectroscopy show that the N-doped graphene improves the electron and Li ion transport in the electrode which results in better electrochemical kinetics than that of the pristine TiO2-B nanowires. As a result, the charge transfer resistance of the TiO2-B/NG electrode is significantly reduced. In addition, the lithium diffusion coefficient of TiO2-B/NG increases by about five times with respect to that of pristine TiO2-B. The TiO2-B/NG composite exhibits a remarkably enhanced electrochemical performance compared to that of TiO2-B. It shows a discharge capacity of 220.7 mA h g(-1) at the 10C rate with a capacity retention of 96% after 1000 cycles. In addition, it can deliver a discharge capacity of 101.6 mA h g(-1) at an ultra high rate of 100C, indicating its great potential for use in high power lithium ion batteries.
文章类型	Article
WOS标题词	Science & Technology ; Physical Sciences ; Technology
DOI	10.1039/c4ta06361a
关键词[WOS]	LI-ION BATTERIES ; OXYGEN REDUCTION REACTION ; CARBON NANOTUBES ; ANODE MATERIAL ; ANATASE TIO2 ; RUTILE TIO2 ; ELECTROCHEMICAL PERFORMANCE ; NITROGEN ; ELECTRODE ; CAPACITY
收录类别	SCI
语种	英语
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
WOS类目	Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号	WOS:000349667700010
引用统计
文献类型	期刊论文
条目标识符	http://ir.qibebt.ac.cn/handle/337004/6095
专题	先进界面技术研究组
作者单位	1.Chinese Acad Sci, CAS Key Lab Biobased Mat, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China 2.Jilin Univ, Coll Phys, Key Lab Phys & Technol Adv Batteries, Minist Educ, Changchun 130012, Peoples R China 3.Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, Qingdao 266100, Peoples R China 4.Jilin Univ, State Key Lab Superhard Mat, Changchun 130012, Peoples R China
推荐引用方式 GB/T 7714	Yan, Xiao,Li, Yanjuan,Li, Malin,et al. Ultrafast lithium storage in TiO2-bronze nanowires/N-doped graphene nanocomposites[J]. JOURNAL OF MATERIALS CHEMISTRY A,2015,3(8):4180-4187.
APA	Yan, Xiao.,Li, Yanjuan.,Li, Malin.,Jin, Yongcheng.,Du, Fei.,...&Wei, Yingjin.(2015).Ultrafast lithium storage in TiO2-bronze nanowires/N-doped graphene nanocomposites.JOURNAL OF MATERIALS CHEMISTRY A,3(8),4180-4187.
MLA	Yan, Xiao,et al."Ultrafast lithium storage in TiO2-bronze nanowires/N-doped graphene nanocomposites".JOURNAL OF MATERIALS CHEMISTRY A 3.8(2015):4180-4187.