Li Jing, Guo Daliang, Wang Qingfei, Chen Xiaohong, Li Jing, Sha Lizheng, Tong Xin
School of Environmental and Natural Resources, Zhejiang University of Science & Technology, Hangzhou 310023, Zhejiang, China.
Hangzhou Weipack Technology Co., Ltd, Hangzhou 310018, China.
Int J Biol Macromol. 2025 May;307(Pt 1):141921. doi: 10.1016/j.ijbiomac.2025.141921. Epub 2025 Mar 10.
High-value utilization of lignin to fabricate carbon nanofibers for supercapacitors has drawn much attention due to its sustainability. However, the heterogeneity of crude lignin structure led to the comparatively poor performance of lignin-based carbon nanofibers (LCNF) as electrodes in supercapacitors. Herein, flexible and porous LCNF simultaneously doped with N, S and Zn were firstly synthesized by electrostatic spinning followed by carbonization. The obtained L-NS20-Zn15 fibers showed optimum specific capacitance of 328.6 F g at current density of 0.5 A g in the three-electrode system. The assembled supercapacitor exhibited specific capacitance of 46.8 F g at current density of 0.5 A g, and energy density of 25.8 W h kg with power density of 200 W kg, which outperformed most of the reported LCNF-based materials. After 3000 charge-discharge cycles, the capacitance retention remained 86 % of the initial value. The remarkable electrochemical performance supports the use of co-doped lignin as a promising material for energy storage.
由于木质素的可持续性，将其高价值利用以制备用于超级电容器的碳纳米纤维备受关注。然而，粗木质素结构的异质性导致木质素基碳纳米纤维（LCNF）作为超级电容器电极的性能相对较差。在此，首先通过静电纺丝然后碳化合成了同时掺杂N、S和Zn的柔性多孔LCNF。在三电极体系中，所制备的L-NS20-Zn15纤维在电流密度为0.5 A g时表现出328.6 F g的最佳比电容。组装后的超级电容器在电流密度为0.5 A g时比电容为46.8 F g，能量密度为25.8 W h kg，功率密度为200 W kg，优于大多数已报道的基于LCNF的材料。经过3000次充放电循环后，电容保持率仍为初始值的86%。这种优异的电化学性能支持了使用共掺杂木质素作为一种有前景的储能材料。
