Flexible Graphene鈥揋raphene Composites of Superior Thermal and Electrical Transport Properties

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• 作者：Zhi-Ling Hou ; Wei-Li Song ; Ping Wang ; Mohammed J. Meziani ; Chang Yi Kong ; Ankoma Anderson ; Halidan Maimaiti ; Gregory E. LeCroy ; Haijun Qian ; Ya-Ping Sun
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2014
• 出版时间：September 10, 2014
• 年：2014
• 卷：6
• 期：17
• 页码：15026-15032
• 全文大小：330K
• ISSN：1944-8252

文摘

Graphene is known for high thermal and electrical conductivities. In the preparation of neat carbon materials based on graphene, a common approach has been the use of well-exfoliated graphene oxides (GOs) as the precursor, followed by conversion to reduced GOs (rGOs). However, rGOs are more suitable for the targeted high electrical conductivity achievable through percolation but considerably less effective in terms of efficient thermal transport dictated by phonon progression. In this work, neat carbon films were fabricated directly from few-layer graphene sheets, avoiding rGOs completely. These essentially graphene鈥揼raphene composites were of a metal-like appearance and mechanically flexible, exhibiting superior thermal and electrical transport properties. The observed thermal and electrical conductivities are higher than 220 W/m路K and 85000 S/m, respectively. Some issues in the further development of these mechanically flexible graphene鈥揼raphene nanocomposite materials are discussed and so are the associated opportunities.

Keywords:

thermal conductivity; electrical conductivity; graphene; composite film; flexible composite; graphene oxide