Preparation of High-Strength Low-Temperature Resistant Conductive Hydrogel and Its Application in Triboelectric Nanogenerators
Triboelectric nanogenerators(TENG),as a new type of sustainable energy harvesting device,have the advantages of self-power,high output,low cost,flexibility and light weight.However,the electrode materials of traditional TENG,such as metal films,carbon sheets and liquid metals,have the disadvantages of poor stretchability,poor conductivity and inability to work at low temperatures.In this paper,conductive ZCC hydrogel materials with excellent mechanical properties(tensile strength of 2.16 MPa,elongation at break of 382％),fatigue resistance,electrical conductivity(9.3 mS/cm),anti-freezing properties(-75 ℃)and water retention properties were prepared by introducing zinc chloride(ZnCl2),sulfobetaine(SBMA),nanocellulose(CNC),and citric acid(CA)into a polyacrylic acid(AA)polymer.The TENG prepared based on this conductive hydrogel has good stretchability,anti-freezing properties(-50 ℃)and stable output voltage(60 V),which can convert the mechanical energy generated by human movement into electrical energy and successfully light up 39 LEDs.Therefore,this hydrogel-based TENG shows great potential for development in the field of energy harvesting and has a broad application prospect.
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