Fabrication of High-Performance LIG-Fe3O4 Composite-Based Micro-Supercapacitor by Laser Direct Writing(Invited)
Supercapacitors have advantages such as high power density,extended lifetime,and fast charging rate,which make them good energy-storage devices.Laser-induced graphene(LIG)is a widely used electrode material for double-layer electric capacitors;however,double-layer LIG electric capacitors typically exhibit low electrochemical performance,and the addition of active materials improves the supercapacitor performance.To control the incorporation of active substances,we propose a method for preparing LIG-Fe3O4 composite-based micro-supercapacitor by laser direct writing polyimide(PI)films coated with Fe(NO3)3.The laser treated area will simultaneously undergo PI film ablation and Fe(NO3)3 decomposition,resulting in LIG-Fe3O4 composite electrode composed of Fe3O4 and LIG.The performance of the prepared LIG-Fe3O4 composite-based micro-supercapacitor has been improved by 7.58 times compared to LIG-based micro-supercapacitor.The proposed method establishes a new route for preparing high-performance LIG-based micro-supercapacitor.
energy storage deviceslaser direct writinglaser-induced graphenemicro-supercapacitor
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