Bifunctional Shared Fibers for High-Efficiency Self-Powered Fiber-Shaped Photocapacitors

Abstract

Fiber-shaped photocapacitors (FPCs) based on shared bifunctional fiber electrodes for supercapacitors and solar cells hold great potential for the realization of self-powered systems for flexible wearable electronics. However, the reported electrodes for FPCs still face certain limitations, such as limited specific energy density, low total photochemical–electric energy conversion efficiency (η_total), and poor flexibility. Herein, hollow fibers consisting of partially reduced graphene oxide and a highly conductive polymer are assembled by wet-spinning and employed as shared bifunctional fibers to fabricate self-powered FPCs. Intriguingly, the FPCs achieve high flexibility and a η_total of 4.2%. This study illustrates a feasible way to design high-performance FPCs and their applications in flexible electronics.

Funding

National Natural Science Foundation of China(No. 52072352)