화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.30, No.3, 198-204, March, 2022
DOI10.1007/s13233-022-0019-7  Export Citation
Modification of Graphene Aerogel Embedded Form-Stable Phase Change Materials for High Energy Harvesting Efficiency
Chengbin Yu, and Young Seok Song1, †
  • Research Institute of Advanced Materials (RIAM), Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
  • 1Department of Fiber Convergence Materials Engineering, Dankook University, Gyeonggi 16890, Korea
E-mail:
While porous graphene aerogel can hold plenty of pure phase change material (PCM) in the internal space, its volume shrinkage is a serious problem to decrease the weight of working material. Since the thermal energy storage (TES) capacity of PCM composite, however, depends on the mass ratio of pure PCM during the phase transition process, graphene aerogel filled PCM composite is an appropriate material for high latent heat thermal energy storage (LHTES). In this work, polydimethylsiloxane (PDMS) is embedded into the graphene aerogel by using a spraying method. The PDMS-embedded graphene aerogel exhibits higher mechanical property and flexibility than pristine aerogel. It reduces the volume shrinkage effectively and sustains the initial 3D porous structure to infiltrate pure PCM into the internal space, which can lead to an increase in the efficiency of thermo-electric energy harvesting due to the increase of PCM weight. A PN junction of thermo-electric power generator (PN TEG) is connected to the modified PCM composites, and a temperature difference between two sides of device occurs under the change of external conditions. The modified PCM composites constructed PN TEG generates stable and continuous thermo-electric energy during heating and cooling processes. In addition, finite element method (FEM) is employed to verify the experimental measurement.
Keywords:phase change material;volume shrinkage;PDMS;thermo-electric energy harvesting
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