Preparation and Thermal Characterization of Hollow Graphite Fibers/Paraffin Composite Phase Change Material
Source abstract
Abstract
Paraffin is one of the most common and promising phase change materials to store and release thermal energy. The inadequacy of paraffin lies in its low thermal conductivity, which affects its further application on thermal energy storage. In this work, hollow fibers derived from pitch were spun. The graphitization (treated at 2773 K under argon atmosphere) induced the carbon atom arrangement and lattice order development, which endowed the hollow graphite fibers (HGFs) with good graphite structure. The HGFs applied as thermal additives into paraffin significantly improved its thermal conductivity. The high thermal conductivity of the HGFs/paraffin composite was achieved up to 2.50 W/(m·K) along the fiber axis, which displayed an over 680% enhancement as compared with that of the pure paraffin. The HGFs displayed significant improvement of the heat transfer rate and heat flow of paraffin, which indicated the promising potential application of the HGFs/paraffin PCM in thermal energy storage systems.
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Research context
OpenAlex topics: Phase Change Materials Research · Solar Thermal and Photovoltaic Systems · Advanced Battery Technologies Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Energy and Power Engineering, North University of China, Taiyuan 030001, China
CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Department of Chemical Engineering, Ordos Institute of Technology, Ordos 017000, China
Department of Materials Engineering, Taiyuan Institute of Technology, Taiyuan 030001, China
Funding
China National Natural Science Foundation · Shanxi Province Science Foundation · Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi · Graduate Student Education Innovation Projects of Shanxi Province · Foundation of North University of China
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