Enhancement of electrical and thermal properties of graphene by aligned carbon nanotubes
Huilin,Li1; Guo,Qiang2; Li,Yongli2; Tian,Dengchao1
Source PublicationMaterials Research Express
AbstractAbstract In order to explore the composite effects of graphene (GR) and carbon nanotubes (CNTs), GR/CNTs aerogels and GR/CNTs coatings were fabricated. Aligned carbon nanotubes (ACNTs) and twining carbon nanotubes (TCNTs) were comparatively examined by integrating them with graphene, which has seldom been studied in detail. Freeze drying was novelly adopted to retain the liquid distribution in GR/CNTs mixture. Fourier Transform Infrared Spectroscopy (FTIR) analysis demonstrated that OH group and carboxylic acid groups were effectively induced onto CNTs via chemical modification. Scanning electron microscopy (SEM) showed that ACNTs achieved better dispersion and homogeneity in graphene than TCNTs. GR/CNTs hybrid composite with various loading of ACNTs or TCNTs were examined by electrical/thermal conductivity tests and practically evaluated for thermal management in LEDs. Results revealed that the electrical and thermal properties of graphene can be dramatically enhanced by the proper addition of ACNTs due to the formation of effective conductive bridges. The GR/ACNTs aerogel with 10 wt% ACNTs attained a high electrical conductivity of 2.08?×?104 S m?1, elevated to 2.76?×?104 S m?1 after annealing treatment. The eco-friendly and low-cost GR/ACNTs coating with 10 wt% ACNTs prominently reduced the operating temperature of LEDs by 8.6 °C, acting as potential thermal management materials in practical applications.
Keywordcarbon nanotubes–graphene hybrids aligned carbon nanotubes electrical property thermal property
WOS IDIOP:2053-1591-7-1-ab6639
PublisherIOP Publishing
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Document Type期刊论文
Affiliation1.Zhengzhou Institute of Emerging Industrial Technology, Zhengzhou 450041, Henan, People’s Republic of China
2.Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
Recommended Citation
GB/T 7714
Huilin,Li,Guo,Qiang,Li,Yongli,et al. Enhancement of electrical and thermal properties of graphene by aligned carbon nanotubes[J]. Materials Research Express,2020,7(1).
APA Huilin,Li,Guo,Qiang,Li,Yongli,&Tian,Dengchao.(2020).Enhancement of electrical and thermal properties of graphene by aligned carbon nanotubes.Materials Research Express,7(1).
MLA Huilin,Li,et al."Enhancement of electrical and thermal properties of graphene by aligned carbon nanotubes".Materials Research Express 7.1(2020).
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