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Title: In Situ Integration of Anisotropic SnO 2 Heterostructures inside Three-Dimensional Graphene Aerogel for Enhanced Lithium Storage
Authors: Yao, Xin
Guo, Guilue
Ma, Xing
Zhao, Yang
Ang, Chung Yen
Luo, Zhong
Nguyen, Kim Truc
Li, Pei-Zhou
Yan, Qingyu
Zhao, Yanli
Keywords: Anisotropic SnO2 heterostructures
Lithium-ion battery
In situ integration
Three-dimensional graphene aerogel
Vacuum-assisted impregnation
Issue Date: 2015
Source: Yao, X., Guo, G., Ma, X., Zhao, Y., Ang, C. Y., Luo, Z., et al. (2015). In Situ Integration of Anisotropic SnO 2 Heterostructures inside Three-Dimensional Graphene Aerogel for Enhanced Lithium Storage. ACS Applied Materials & Interfaces, 7(47), 26085-26093.
Series/Report no.: ACS Applied Materials & Interfaces
Abstract: Three-dimensional (3D) graphene aerogel (GA) has emerged as an outstanding support for metal oxides to enhance the overall energy-storage performance of the resulting hybrid materials. In the current stage of the studies, metals/metal oxides inside GA are in uncrafted geometries. Introducing structure-controlled metal oxides into GA may further push electrochemical properties of metal oxide–GA hybrids. Using rutile SnO2 as an example, we demonstrated here a facile hydrothermal strategy combined with a preconditioning technique named vacuum-assisted impregnation for in situ construction of controlled anisotropic SnO2 heterostructures inside GA. The obtained hybrid material was fully characterized in detail, and its formation mechanism was investigated by monitoring the phase-transformation process. Rational integration of the two advanced structures, anisotropic SnO2 and 3D GA, synergistically led to enhanced lithium-storage properties (1176 mAh/g for the first cycle and 872 mAh/g for the 50th cycle at 100 mA/g) as compared with its two counterparts, namely, rough nanoparticles@3D GA and anisotropic SnO2@2D graphene sheets (618 and 751 mAh/g for the 50th cycle at 100 mA/g, respectively). It was also well-demonstrated that this hybrid material was capable of delivering high specific capacity at rapid charge/discharge cycles (1044 mAh/g at 100 mA/g, 847 mAh/g at 200 mA/g, 698 mAh/g at 500 mA/g, and 584 mAh/g at 1000 mA/g). The in situ integration strategy along with vacuum-assisted impregnation technique presented here shows great potential as a versatile tool for accessing a variety of sophisticated smart structures in the form of anisotropic metals/metal oxides within 3D GA toward useful applications.
ISSN: 1944-8244
DOI: 10.1021/acsami.5b07081
Rights: © 2015 American Chemical Society. This paper was published in ACS Applied Materials and Interfaces and is made available as an electronic reprint (preprint) with permission of American Chemical Society. The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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