Ultrathin 2D Mesoporous TiO2/rGO Heterostructure for High-Performance Lithium Storage

doi:10.1002/smll.202000030

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Ultrathin 2D Mesoporous TiO2/rGO Heterostructure for High-Performance Lithium Storage
	Liang, Yaru ; Xiong, Xiang ; Xu, Zhuijun ; Xia, Qingbing ; Wan, Liyang ; Liu, Rutie ; Chen, Guoxin ; Chou, Shu-Lei
刊名	SMALL
	2020
卷号	16 期号:26
关键词	REDUCED GRAPHENE OXIDE ANODE MATERIAL ANATASE TIO2 PHOTOCATALYTIC ACTIVITY ION BATTERIES LI STORAGE CARBON NANOCOMPOSITE NANOFIBERS COMPOSITE
DOI	10.1002/smll.202000030
英文摘要	Lithium-ion batteries (LIBs) have been widely applied and studied as an effective energy supplement for a variety of electronic devices. Titanium dioxide (TiO2), with a high theoretical capacity (335 mAh g(-1)) and low volume expansion ratio upon lithiation, has been considered as one of the most promising anode materials for LIBs. However, the application of TiO2 is hindered by its low electrical conductivity and slow ionic diffusion rate. Herein, a 2D ultrathin mesoporous TiO2/reduced graphene (rGO) heterostructure is fabricated via a layer-by-layer assembly process. The synergistic effect of ultrathin mesoporous TiO2 and the rGO nanosheets significantly enhances the ionic diffusion and electron conductivity of the composite. The introduced 2D mesoporous heterostructure delivers a significantly improved capacity of 350 mAh g(-1) at a current density of 200 mA g(-1) and excellent cycling stability, with a capacity of 245 mAh g(-1) maintained over 1000 cycles at a high current density of 1 A g(-1). The in situ transmission electron microscopy analysis indicates that the volume of the as-prepared 2D heterostructures changes slightly upon the insertion and extraction of Li+, thus contributing to the enhanced long-cycle performance.
学科主题	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20746]
专题	2020专题
作者单位	1.Xiong, X (corresponding author), Cent South Univ, State Key Lab Powder Met, Lushan South Rd, Changsha 410083, Peoples R China. 2.Chen, GX (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China. 3.Chou, SL (corresponding author), Univ Wollongong, Australian Inst Innovat Mat, Inst Superconducting & Elect Mat, Innovat Campus, North Wollongong, NSW 2522, Australia.
推荐引用方式 GB/T 7714	Liang, Yaru,Xiong, Xiang,Xu, Zhuijun,et al. Ultrathin 2D Mesoporous TiO2/rGO Heterostructure for High-Performance Lithium Storage[J]. SMALL,2020,16(26).
APA	Liang, Yaru.,Xiong, Xiang.,Xu, Zhuijun.,Xia, Qingbing.,Wan, Liyang.,...&Chou, Shu-Lei.(2020).Ultrathin 2D Mesoporous TiO2/rGO Heterostructure for High-Performance Lithium Storage.SMALL,16(26).
MLA	Liang, Yaru,et al."Ultrathin 2D Mesoporous TiO2/rGO Heterostructure for High-Performance Lithium Storage".SMALL 16.26(2020).