Synthesis of sandwich-like TiO2@C composite hollow spheres with high rate capability and stability for lithium-ion batteries

被引：84

作者：

Liu, Lichen ^{[1
,2
]}

Fan, Qi ^{[3
]}

Sun, Chuanzhi ^{[4
]}

Gu, Xianrui ^{[1
,2
]}

Li, Hao ^{[1
,2
]}

Gao, Fei ^{[1
]}

Chen, Yanfeng ^{[3
]}

Dong, Lin ^{[1
,2
]}

机构：

[1] Nanjing Univ, Ctr Modern Anal, Jiangsu Key Lab Vehicle Emiss Control, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab Mesoscop Chem, Nanjing 210093, Jiangsu, Peoples R China

[3] Nanjing Univ, Coll Engn & Appl Sci, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[4] Shandong Normal Univ, Dept Chem Chem Engn & Mat Sci, Jinan 250014, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2013年 / 221卷

基金：

中国国家自然科学基金;

关键词：

Anatase hollow spheres; {001} facets; Carbon-coating; Lithium-ion batteries; ELECTROCHEMICAL PROPERTIES; TIO2; ANATASE; STORAGE; MICROSPHERES; NANOSPHERES; PERCENTAGE; EFFICIENT; INSERTION; FACETS;

D O I：

10.1016/j.jpowsour.2012.07.105

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Novel sandwich-like TiO2@C composite hollow spheres with {001} facets exposed are obtained through hydrothermal carbon-coating treatment for the first time. Based on investigations by transmission electron microscopy (TEM), scanning electron microscopy (FESEM), XRD, laser Raman spectra, and N-2 adsorption-desorption isotherms, TiO2 shells are proved to be wrapped in porous carbon layers, which provide conductive support for TiO2, resulting the improvement in electronic conductivity and diffusion of Li+ Moreover, these TiO2 shells expose the reactive {001} facets, which facilitate Li+ insertion/extraction. Through combining the above advantages, TiO2@C composite hollow spheres show more superior rate capability and higher stability than TiO2 nanoparticles (Degussa P25), TiO2 nanosheets with {001} facets exposed, and TiO2 hollow spheres before carbon-coating. This method may be extended to synthesize other sandwich-like composite hollow spheres for energy storage. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：141 / 148

页数：8

共 40 条

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