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a) Preparation diagram of PEG/HPC composite PCMs. b) Formation mechanism of highly hierarchical porous carbon. c) XRD patterns of PEG/HPC‐1000 composite PCMs at various temperatures. d) DSC curves. e) Thermal conductivities and latent heats of pure PEG and PEG/HPC‐1000 composite PCMs. Reproduced with permission.[ 130 ] Copyright 2016, Royal Society of Chemistry.
