Boron and Fluorine Co-doped Laser-Induced Graphene towards High-Performance Micro-Supercapacitors

Guanying Yuan, Tong Wan*, Amal BaQais, Yirui Mu, Dapeng Cui, Mohammed A. Amin, Xiaodong Li*, Ben Bin Xu, Xiaohan Zhu, Hassan Algadi, Handong Li, Priyanka Wasnik, Na Lu, Zhanhu Guo*, Huige Wei*, Bowen Cheng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Laser-induced graphene (LIG) has attracted extensive research as an electrode material for micro-supercapacitors (MSC). However, the low capacitive performance of LIG arising from both limited specific surface area and few active sites remains challenging. Herein, in situ doping of fluorine and boron atoms into laser-induced graphene was innovatively achieved via laser direct writing approach using boron-doped fluorinated polyimide (FB-PI) as the precursor. The porous fluorine and boron co-doped laser-induced graphene (FB-LIG) exhibits more active sites and improved wettability and significantly enhanced capacitive performance due to the synergistic effect of fluorine and boron co-doping. By tuning the weight ratio of boron to fluorine, the MSC utilizing FB-LIG as the electrode and poly(vinyl alcohol) (PVA)/H2SO4 as the gel electrolyte delivers a high areal capacitance of 49.81 mF/cm2 at a current density of 0.09 mA/cm2, 23 times higher that of MSC from commercial polyimide (PI)-based LIG, and 3 times that of MSC from fluorinated PI-based LIG. In addition, MSCs from FB-LIG possess excellent mechanical stability and flexibility, rendering them promising for flexible wearable microelectronics.
Original languageEnglish
Article number118101
Number of pages9
Early online date11 May 2023
Publication statusPublished - 1 Aug 2023

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