N‐Doped Holey Graphene/Porous Carbon/Cellulose Nanofibers Electrode and Hydrogel Electrolyte for Low‐temperature Zinc‐ion Hybrid Supercapacitors

) at -20 °C. These results demonstrate the promising application potential of these ZHSCs in cold environments while maintaining impressive energy storage capabilities. This work provides valuable insights and a robust strategy for the design of high-performance low-temperature ZHSCs, enhancing their practical applicability in renewable energy storage systems.