Preparation of flexible and binder-free lignin-based carbon nanofiber electrode materials by electrospinning in aqueous system
Author:
Wang Yunxia1, Hao Pengfei1ORCID, Lei Lirong1, Hou Yi1
Affiliation:
1. State Key Laboratory of Pulp and Paper Engineering , South China University of Technology , Guangzhou , China
Abstract
Abstract
Lignin, as a widely distributed, renewable and environmentally friendly source of carbon, could been utilized for carbon nanofibers to not only maximize the usage of resources, but also expand the energy-related opportunities. In this research, flexible lignin-based carbon nanofibers are prepared by electrospinning lignin nanofibers in a new green aqueous solution of lignin and polyvinyl alcohol (PVA), which is then characterized by physical and chemical characterizations. The results reveal that optimal carbonization temperature of 800 °C shows great improvements on the structural properties of lignin-based carbon nanofibers, which can be applied as binder-free electric double layer capacitor (EDLC) electrodes with good flexibility. The 2032 type button battery has a superior electrochemical performance with a large specific capacitance of 217.2 F g−1 at a 0.2 A g−1 current density, and remarkable cyclic stability of 94.9 % capacitance retention even after 10,000 charge and discharge cycles, due to the abundance of mesoporous volume and large microporous surface area of lignin-based carbon nanofiber electrodes carbonized in 800 °C.
Publisher
Walter de Gruyter GmbH
Subject
General Materials Science,Forestry
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