Thermoelectric behavior of aerogels based on graphene and multi-walled carbon nanotube nanocomposites |
| |
| Affiliation: | 1. College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, China;2. College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China;3. Key Laboratory of Special Waste Water Treatment, Sichuan Province Higher Education System, Chengdu 610068, China;1. Laboratory for the Technological Innovation of Structures and Materials (LITEM), Colon 11, TR45, Terrassa, 08222 Barcelona, Spain;2. International Center for Numerical Methods in Engineering (CIMNE), Gran Capità s/n, Edifici C1, 08034 Barcelona, Spain;3. Departament de Resistència de Materials i Estructures a l''Enginyeria, Universitat Politècnica de Catalunya – BarcelonaTech, Spain;4. Department of Aerospace Engineering Sciences and Center for Aerospace Structures, University of Colorado, Campus Box 429, Boulder, CO 80309-0429, USA;5. Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta 390, 08017 Barcelona, Spain;1. Energy Materials Center, Energy & Environment Division, Korea Institute of Ceramic Engineering & Technology, 101, Soho-ro, Jinju-si, Gyeongsangnam-do, Republic of Korea;2. School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea;3. Department of Materials System Engineering, Pukyong National University, Busan, 48513, Republic of Korea;1. Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, School of Materials Science & Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China;2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. School of Materials Science and Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, China;1. Shanghai Key Laboratory of Development and Application for Metal-Functional Materials, Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, School of Materials Science & Engineering, Tongji University, 4800 Caoan Road, Shanghai, 201804, China;2. School of Materials Science and Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, China;3. College of Mechanical and Electrical Engineering, Jiaxing University, Jiaxing, 314001, China |
| |
| Abstract: | In this work, we presented that the Seebeck coefficient and electrical conductivity can be increased simultaneously in aerogels based on graphene and multi-walled carbon nanotube (graphene-MWCNT) nanocomposites, and at the same time the thermal conductivity is depressed due to 3D porous skeleton structure. As a result, graphene-MWCNT aerogels possess ultra-low thermal conductivities (∼0.056 W m−1 K−1) and apparent density (∼24 kg m−3), thereafter the figure of merit (ZT) of ∼0.001 is achieved. Although the ZT value is too low for practical application as a thermoelectric (TE) material, the unique structure in this project provides a potential way to overcome the challenge in bulk semiconductors that increasing electrical conductivity generally leads to decreased Seebeck coefficient and enhanced thermal conductivity. |
| |
| Keywords: | A. Carbon-carbon composites (CCCs) B. Electrical properties B. Thermal properties B. Porosity Energy conversion |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
