Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume -, Issue 48, Pages 5167-5175Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201800811
Keywords
Phase change materials; Carbon; Gels; Thermal energy storage; Materials science
Categories
Funding
- National Natural Science Foundation of China [51436001, 51572022]
- Fundamental Research Funds for the Central Universities [FRF-BD-16-008A]
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New shape-stabilized paraffin/porous carbon materials derived from metal organic gel (cMOG)/boron nitride (BN) composites were prepared by the impregnation method. In the composites, paraffin was used as phase change material, while cMOG as a supporting and loading large paraffin content in the pores owing to high specific surface area and BN employed to enhance the thermal conductivity. The scanning electron microscopy images showed better filler-filler connectivity in BN/cMOG than the individual supporting materials. With the synergy of BN and cMOG, the thermal conductivity of BN/cMOG/PCM composites exhibited up to 232.1 % of pristine PCM and 82.3 % of binary BN/PCM composites at the same wt.-% of BN. The latent heat as-synthesized composite attains up to 163.1 J/g with up to 80 wt.-% of paraffin retained in the composites without any leakage. In addition, the composites revealed enhanced heat transfer performance in both the solid and liquid states. Similarly, the XRD and FTIR analysis showed excellent chemical compatibility between paraffin and the supporting materials. In addition, the composite has high thermal stability, reduced supercooling extent, and better reliability after 200 times thermal cycling, which indicate a promising method for large-scale thermal energy storage.
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