Temperature-dependent pseudocapacitive behaviors of polyaniline-based all-solid-state fiber supercapacitors

•A pseudo-supercapacitor based on core-sheathed ternary electrodes was prepared.•The growth of capacitance with increasing temperature stops beyond 40 ℃.•The mismatched thermal expansion of PANI and porous CNTs affects the capacitance.•Low temperature will lead to high internal resistance and poor capacitance.•The cyclic stability of the supercapacitor decreases with elevating temperature.