Sol鈥揋el Design Strategy for Ultradispersed TiO2 Nanoparticles on Graphene for High-Performance Lithium Ion Batteries

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• 作者：Wei Li ; Fei Wang ; Shanshan Feng ; Jinxiu Wang ; Zhenkun Sun ; Bin Li ; Yuhui Li ; Jianping Yang ; Ahmed A. Elzatahry ; Yongyao Xia ; Dongyuan Zhao
• 刊名：Journal of the American Chemical Society
• 出版年：2013
• 出版时间：December 11, 2013
• 年：2013
• 卷：135
• 期：49
• 页码：18300-18303
• 全文大小：269K
• 年卷期：v.135,no.49(December 11, 2013)
• ISSN：1520-5126

文摘

The rational design and controllable synthesis of strongly coupled inorganic/graphene hybrids represents a long-standing challenge for developing advanced catalysts and energy-storage materials. Here, we report a simple sol鈥揼el method toward creating ultradispersed TiO₂ nanoparticles on graphene with an unprecedented degree of control based on the precise separation and manipulation of nanoparticles nucleated, grown, anchored, and crystallized and the reduction of graphene oxide (GO). The hybrid materials show ultradispersed anatase nanoparticles (5 nm), ultrathin thickness (鈮? layers), and a high surface area of 229 m²/g and exhibit a high specific capacity of 94 mA h g^鈥? at 59 C, which is twice as that of mechanically mixed composites (41 mA h g^鈥?), demonstrating the potential of strongly synergistic coupling effects for advanced functional systems.