Fabrication and characterisation of energy storage fibres

Fibre supercapacitors were designed and manufactured using a dip coating method. Their electrochemical properties were characterised using a VersaSTAT 3 workstation. Chinese ink with a fine dispersion of carbon and binder was coated as the electrode material. The specific capacitance per unit length of a copper fibre supercapacitor with the length of 41 cm reached 34.5 mF/cm. When this fibre supercapacitor was bent on rods with a diameter of 10.5 cm, the specific capacitance per length was 93% of the original value (without bending). It proved that these fibre supercapacitors have a good flexibility and energy storage capacity.