Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 8, Issue 34, Pages 12831-12841Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c03062
Keywords
ligninn; modification and fractionation; carbon fibers; electrospinning; supercapacitors
Categories
Funding
- National Natural Science Foundation of China [31800498]
- Natural Science Foundation of Liaoning Province of China [2019-BS-16]
- Open Fund of Jiangsu Provincial Key Laboratory of Pulp and Paper Science and Technology [KL201903]
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Lignin shows great potential for carbon-based functional materials and composite material electronics. However, high heterogeneity, poor thermal stability, and low molecular weight limit the practical application of lignin for fiber-shaped lignin-based materials, especially in the field of supercapacitors with high energy storage devices. Herein, a simple modification and fractionation strategy is designed to obtain lignin for the preparation of high-performance lignin-based carbon fibers (CFs). The modification and fractionation process effectively increases the molecular weight and reduces the heterogeneity of lignin. The introduction of lignin with large molecular weight and low heterogeneity is conducive to reduce the carbon weight loss of the precursor fibers, maintain the morphology of lignin-based CFs, and then significantly improve the specific surface area and energy storage properties. The specific surface area and energy storage density of the obtained lignin-based CFs reach 2042.86 m(2)/g and 442.2 F/g, respectively. This strategy provides a simple and effective method for the preparation of high-performance, low-cost, and green energy storage materials.
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