Electrochemical Performance of Core-Sheath Dip-Coated Lignin Derived Carbon/Wet-Spun Graphene Electrodes for Fiber-Shaped Supercapacitors

• Published in: 东华大学学报（英文版） Vol. 38; no. 2; pp. 91 - 98
• Main Authors: HU Wenxin, LIU Yan, XIANG Ruifang, JING Yuanyuan, XU Qingli, ZHANG Juan, HU Xuefeng, JIN Yanhong, YANG Xiaona, CHENG Yu, LIN Jiaxian, ZHANG Kun, LU Chunhong
• Format: Journal Article
• Language: English
• Published: College of Textiles,Donghua University,Shanghai 201620,China 30.04.2021; Key Laboratory of Textile Science&Technology,Ministry of Education,Donghua University,Shanghai 201620,China
• Subjects: wet-spinning; energy density; specific capacitance; lignin derived carbon; graphene
• ISSN: 1672-5220
• DOI: 10.19884/j.1672-5220.202012115

TS151; One-dimensional graphene fibers ( GFs ) possess excellent properties, including high electrical conductivity, good physical and chemical stability, high thermal conductivity, flexibility, etc. GFs are ideal electrode materials for fiber-shaped supercapacitors. However, due to the lack of an effective method to manufacture GFs with high specific capacitance, their low energy density hinders their practical application. Herein, we decorated wet-spun graphene oxide fibers ( GOFs ) by dip-coating them with graphene oxide ( GO) solutions containing different contents of lignin to obtain a core-sheath lignin/GO composite fibers. After carbonization and activation, we successfully prepared lignin derived carbon/GF electrodes. The assembled fiber-shaped supercapacitors ( FSSCs ) exhibit a specific capacitance of 9. 98 mF/cm2 and an energy density of 0.89 μW·h/cm2 , about 6 times of those of pure GFs (1.57 mF/cm2 and 0.14 μW·h/cm2, respectively), long cycling life and cycling stability. This suggests that the introduction of lignin derived carbon into GFs can effectively increase the specific capacitance and the energy density of FSSCs.