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Open AccessArticle

A Facile Approach to Tune the Electrical and Thermal Properties of Graphene Aerogels by Including Bulk MoS2

1
School of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
2
Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore
3
School of Chemical, Biological, and Materials Engineering, University of Oklahoma, Norman, OK 73019, USA
*
Authors to whom correspondence should be addressed.
Nanomaterials 2017, 7(12), 420; https://doi.org/10.3390/nano7120420
Received: 9 November 2017 / Revised: 25 November 2017 / Accepted: 27 November 2017 / Published: 1 December 2017
(This article belongs to the Special Issue Carbon nanostructure for energy storage and conversion)
Graphene aerogels (GAs) have attracted extensive interest in diverse fields, owing to their ultrahigh surface area, low density and decent electrical conductivity. However, the undesirable thermal conductivity of GAs may limit their applications in energy storage devices. Here, we report a facile hydrothermal method to modulate both the electrical and thermal properties of GAs by including bulk molybdenum disulfide (MoS2). It was found that MoS2 can help to reduce the size of graphene sheets and improve their dispersion, leading to the uniform porous micro-structure of GAs. The electrical measurement showed that the electrical conductivity of GAs could be decreased by 87% by adding 0.132 vol % of MoS2. On the contrary, the thermal conductivity of GAs could be increased by ~51% by including 0.2 vol % of MoS2. The quantitative investigation demonstrated that the effective medium theories (EMTs) could be applied to predict the thermal conductivity of composite GAs. Our findings indicated that the electrical and thermal properties of GAs can be tuned for the applications in various fields. View Full-Text
Keywords: graphene aerogel; molybdenum disulfide; tunable thermal conductivity; electrical conductivity; energy storage graphene aerogel; molybdenum disulfide; tunable thermal conductivity; electrical conductivity; energy storage
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MDPI and ACS Style

Gong, F.; Liu, X.; Yang, Y.; Xia, D.; Wang, W.; Duong, H.M.; Papavassiliou, D.V.; Xu, Z.; Liao, J.; Wu, M. A Facile Approach to Tune the Electrical and Thermal Properties of Graphene Aerogels by Including Bulk MoS2. Nanomaterials 2017, 7, 420.

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