Hydrogel Electrolyte Film with Low‐Temperature Adaptability for Flexible Quasi‐Solid‐State Batteries

at -40 °C (0.1C). Notably, the cyclic stability of the LTE-based flexible full cell maintains well even under 180° bending and 15% stretching. This can be attributed to the polymer network with hydrophilic groups, which disrupts the hydrogen-bond networks of original water molecules and forms abundant new hydrogen bonding interactions between the polymer chains and water molecules. These interactions are crucial for improving low-temperature adaptability. Overall, this work offers a promising approach to creating low-temperature adaptable hydrogels that can be used to develop wearable energy-storage devices.