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Abstract

With rapid development in the smart wearable field, new-style flexible energy storage devices are necessary to satisfy the demands of flexible smart clothing. Thereinto, fiber supercapacitors present promising application prospects. This work puts forward a facile and reliable strategy to fabricate coaxial fiber electrodes via binary wet spinning, and further assembles them into parallel or twisted nano-MnO₂ fiber supercapacitors. In the obtained fiber electrode, a carboxymethylcellulose layer onto nano-MnO₂ not only allows the requisite ion exchange between the electrochemical active materials and gel electrolyte, but also plays the role of separator to protect the two fiber electrodes effectively from contacting a short circuit, greatly ensuring the electrochemical stability of the nano-MnO₂ fiber supercapacitors. The parallel nano-MnO₂ fiber supercapacitor reaches a maximum C_L of 19.7 μF/cm, E_L of 0.0027 μWh/cm and P_L of 1.49 μW/cm; the twisted MnO₂ fiber supercapacitor achieves maximum C_L, E_L and P_L of 49 μF/cm, 0.0053 μWh/cm and 1.0 μW/cm, respectively. Besides, the outstanding softness and tensile properties of the obtained nano-MnO₂ fiber supercapacitors also guarantee stable electrochemical performance under bending, knotting or other large-distortion situations, which is beneficial to develop a new generation of metal oxide fiber supercapacitors for smart wearable clothing.

Keywords

Fiber supercapacitors parallel and twisted smart wearable clothing

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Different assembled nano-MnO 2 fiber supercapacitors applied for smart wearable clothing

Abstract

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