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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
Source PublicationIONICS
2017-08-01
Volume23Issue:8Pages:2013-2024
ISSN0947-7047
AbstractA 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.
KeywordSolid-phase Synthesis Core-shell Structure Tio2 Nanocrystals Lithium-ion Battery
DOI10.1007/s11581-017-2053-6
Indexed BySCI ; EI
Language英语
WOS IDWOS:000406286800009
WOS KeywordSENSITIZED SOLAR-CELLS ; HIGH-PERFORMANCE ANODE ; ELECTROPHILIC OXIDATION ; ANATASE TIO2 ; NANOTUBE ; STORAGE ; NANOCOMPOSITE ; GRAPHENE ; CAPABILITY ; NANOFIBERS
WOS Research AreaChemistry ; Electrochemistry ; Physics
WOS SubjectChemistry, Physical ; Electrochemistry ; Physics, Condensed Matter
Funding OrganizationNatural 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)
DepartmentLNM生物材料微结构和力学性能
Classification二类
Ranking2
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60921
Collection非线性力学国家重点实验室
Corresponding AuthorLiu, BY
Recommended Citation
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.
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