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J Am Chem Soc. 2013 Dec 11;135(49):18300-3. doi: 10.1021/ja4100723. Epub 2013 Nov 25.

Sol-gel design strategy for ultradispersed TiO2 nanoparticles on graphene for high-performance lithium ion batteries.

Author information

1
Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, and State Key Laboratory of Molecular Engineering of Polymers, Fudan University , Shanghai 200433, PR China.

Abstract

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-gel 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 (≤3 layers), and a high surface area of ~229 m(2)/g and exhibit a high specific capacity of ~94 mA h g(-1) at ~59 C, which is twice as that of mechanically mixed composites (~41 mA h g(-1)), demonstrating the potential of strongly synergistic coupling effects for advanced functional systems.

PMID:
24251981
DOI:
10.1021/ja4100723

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