Wearable Lithium-Ion Batteries Using Textile-Graphene Composite Electrodes

This project aims for developing a wearable type of Li-ion batteries using textile/graphene composites electrodes and solid electrolyte. Such composite electrodes exhibit low sheet resistance (<1 ohm/sq.), great flexibility (<10% deterioration after 1000 folding) and good capacity (close to 200 mAh/g). The wearable lithium-ion battery with solid electrolyte can yield the high energy density (>100 Wh/kg) while maintaining a good cycle life (>90% after 500 cycles) and great flexibility (no capacity fading after 1000 folding). 

Application

1) intelligence electronic textiles (e.g., smart insoles/shoes/underwear, lighting garments/accessories)
2) Internet of Things (IoT) components (e.g., GPS sensors, logistic trackers)
3) Healthcare/medical accessories (e.g., pressure/temperature sensors)

Technological Breakthrough

This technology replaces the metal thin-film with metallic textiles as the current collectors to assemble the wearable Li-ion batteries. Compared with the existing technologies (i.e., metal thin-film based Li-ion batteries), the metallic fabrics exhibits better mechanical flexibility and stability, therefore enabling the great foldability to the batteries. In additions, metallic fabrics with their fibrous structures provide sufficient surface area for the anchoring of composite materials, which greatly attribute to the good cyclic stability of the batteries.

Industry Benefit

The technology provides a new power supply solution for flexible and wearable electronics to significantly exploit the potential of their product designs. Wearable Li-ion batteries developed by textile/graphene composite electrodes and solid-state electrolyte can achieve excellent flexibility, safety while maintaining the good energy storage capability. They can be customised into any desirable sizes and shapes to make the most of the space in those electronic devices without compromising the its capacity and wearing comfort. In addition, the entire fabrication processes are compatible with the roll-to-roll production of textile fabrics and the manufacturing of batteries.

For more details, please contact us. (Email: info@hkrita.com; Tel: (852) 2627 0180)