Low-temperature one-step solid-phase synthesis of carbon-encapsulated TiO2 nanocrystals as anode materials for lithium-ion batteries

doi:10.1007/s11581-017-2053-6

IMECH-IR > 非线性力学国家重点实验室

	Low-temperature one-step solid-phase synthesis of carbon-encapsulated TiO2 nanocrystals as anode materials for lithium-ion batteries
	Liu, Boyang; Shao YF(邵颖峰); Xiang, Xin; Ren, Jiayuan; Li, Wenge; Liu, BY
发表期刊	IONICS
	2017-08-01
卷号	23 期号:8 页码:2013-2024
ISSN	0947-7047
摘要	A simple and highly efficient method is developed for in situ one-step preparation of carbon co-encapsulated anatase and rutile TiO2 nanocrystals (TiO2@C) with core-shell structure for lithium-ion battery anode. The synthesis is depending on the solid-phase reaction of titanocene dichloride with ammonium persulfate in an autoclave at 200 degrees C for 30 min. The other three titanocene complexes including bis(cyclopentadienyl)dicarbonyl titanium, cyclopentadienyltitanium trichloride, and cyclopentadienyl(cycloheptatrienyl)titanium are used instead to comprehensively investigate the formation mechanism and to improve the microstructure of the product. The huge heat generated during the explosive reaction cleaves the cyclopentadiene ligands into small carbon fragments, which form carbon shell after oxidative dehydrogenation coating on the TiO2 nanocrystals, resulting in the formation of core-shell structure. The TiO2 nanocrystals prepared by titanocene dichloride have an equiaxed morphology with a small diameter of 10-55 nm and the median size is 30.3 nm. Hundreds of TiO2 nanocrystals are encapsulated together by the worm-like carbon shell, which is amorphous and about 20-30 nm in thickness. The content of TiO2 nanocrystals in the nanocomposite is about 31.1 wt.%. This TiO2@C anode shows stable cyclability and retains a good reversible capacity of 400 mAh g(-1) after 100 cycles at a current density of about 100 mA g(-1), owing to the enhanced conductivity and protection of carbon shell.
关键词	Solid-phase Synthesis Core-shell Structure Tio2 Nanocrystals Lithium-ion Battery
DOI	10.1007/s11581-017-2053-6
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000406286800009
关键词[WOS]	SENSITIZED SOLAR-CELLS ; HIGH-PERFORMANCE ANODE ; ELECTROPHILIC OXIDATION ; ANATASE TIO2 ; NANOTUBE ; STORAGE ; NANOCOMPOSITE ; GRAPHENE ; CAPABILITY ; NANOFIBERS
WOS研究方向	Chemistry ; Electrochemistry ; Physics
WOS类目	Chemistry, Physical ; Electrochemistry ; Physics, Condensed Matter
项目资助者	Natural Science Foundation of Shanghai(14ZR1419400 ; National Natural Science Foundation of China(11572326) ; Opening fund of State Key Laboratory of Nonlinear Mechanics, and Technology Innovation Action of Shanghai(12nm0503100) ; 15ZR1420500)
课题组名称	LNM生物材料微结构和力学性能
论文分区	二类
力学所作者排名	2
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/60921
专题	非线性力学国家重点实验室
通讯作者	Liu, BY
推荐引用方式 GB/T 7714	Liu, Boyang,Shao YF,Xiang, Xin,et al. Low-temperature one-step solid-phase synthesis of carbon-encapsulated TiO2 nanocrystals as anode materials for lithium-ion batteries[J]. IONICS,2017,23,8,:2013-2024.
APA	Liu, Boyang,邵颖峰,Xiang, Xin,Ren, Jiayuan,Li, Wenge,&Liu, BY.(2017).Low-temperature one-step solid-phase synthesis of carbon-encapsulated TiO2 nanocrystals as anode materials for lithium-ion batteries.IONICS,23(8),2013-2024.
MLA	Liu, Boyang,et al."Low-temperature one-step solid-phase synthesis of carbon-encapsulated TiO2 nanocrystals as anode materials for lithium-ion batteries".IONICS 23.8(2017):2013-2024.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
JouArt-2017-087.pdf（3227KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	浏览下载