Nanoconic TiO2 hollow spheres: novel buffers architectured for high-capacity anode materials

被引：40
作者：
Lei, Jianfei [1 ]
Li, Weishan [1 ,2 ,3 ]
Li, Xiaoping [1 ,2 ,3 ]
Cairns, Elton J. [4 ]
机构：
[1] S China Normal Univ, Sch Chem & Environm, Guangzhou, Guangdong, Peoples R China
[2] S China Normal Univ, Key Lab Electrochem Technol Energy Storage & Powe, Guangdong Higher Educ Inst, Guangzhou, Guangdong, Peoples R China
[3] S China Normal Univ, Engn Res Ctr Mat & Technol Electrochem Energy Sto, Minist Educ, Guangzhou, Guangdong, Peoples R China
[4] Univ Calif Berkeley, Dept Chem & Biomol Engn, Berkeley, CA 94720 USA
来源：
JOURNAL OF MATERIALS CHEMISTRY | 2012年 / 22卷 / 41期
基金：
中国国家自然科学基金;
关键词：
LATEX-PARTICLES; ANATASE; PERFORMANCE; MICROSPHERES;
D O I：
10.1039/c2jm34332k
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：
An attempt has been carried out here to use nanoconic TiO2 hollow spheres as buffers to accommodate the volume expansion of high-capacity materials. Based on the TiO2 hollow spheres, we tailor-designed a novel composite, in which the high Li+-transport dynamics of titanate hollow spheres (TiO2) and the high capacity of tin oxide (SnO2) were intimately integrated into a hierarchical architecture of nanocones, while the unique spatial arrangement of the SnO2 component in the nano-cavities effectively accommodates the volume change during lithiation/de-lithiation, hence rendering the composite stable cycling life. Electrochemical tests revealed favorable performances of the composite SnO2-TiO2 nanocones in terms of enhanced lithium storage capacity, stable cycle life and improved rate performance compared with each material components.
引用
收藏
页码：22022 / 22027
页数：6
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