Facile synthesis of novel CuCo2S4 nanospheres for coaxial fiber supercapacitors

Flexible and highly efficient energy storage units act as one of the key components in portable electronics. In this work, based on CuCo2S4 nanospheres, a flexible all-solid-state coaxial fiber supercapacitor is designed and produced via a low cost and facile method. The as-fabricated flexible device exhibits high specific capacitance, high energy density, excellent rate capability and outstanding long-term cycling stability. This approach can be an efficient strategy for the preparation of novel and low-cost electrodes for various applications.