Mechanically robust and high latent heat solid–solid phase change materials via a H-bonding collaborative strategy for energy storage and conversion

). This dual-functionality strategy yields comprehensive performance exceeding that of most previously reported SSPCMs. Furthermore, the dynamic hydrogen-bond network imparts multiple advanced functionalities, including excellent recyclability, shape memory, and self-healing capabilities. Critically, the hydrogen-bonding mechanism mitigates the aggregation of hydroxylated multi-walled carbon nanotubes (MWCNTs), ensuring uniform dispersion within the SSPCM matrix. This advancement facilitates practical implementation in photothermal conversion and low-pressure Joule heating applications. Our supramolecular design strategy thus establishes a new paradigm for sustainable energy storage materials that simultaneously possess high mechanical integrity and significant latent heat capacity.