Wang Wenyu, Wang Hongjie, Wang He, Jin Xin, Li Jialu, Zhu Zhengtao
State Key Laboratory of Separation Membranes and Membrane Processes, School of Textiles, Tianjin Polytechnic University Tianjin 300387 China wwy-126.com.
School of Materials Science and Engineering, Tianjin Polytechnic University Tianjin 300387 China.
RSC Adv. 2018 Aug 9;8(50):28480-28486. doi: 10.1039/c8ra05957h. eCollection 2018 Aug 7.
Carbon nanofibrous mats (CNFMs) are prepared by electrospinning of blended precursor of polyacrylonitrile and polysulfone (PSF) followed by pre-oxidation stabilization and carbonization. Addition of PSF as a sacrificial polymer leads to CNFMs with high surface area, large numbers of micropores and mesopores, good degree of carbonization, and interconnected fibrous network, due to the high decomposition temperature, release of SO during decomposition, and large amount of carbon residue of PSF during carbonization. The electrochemical characterization shows that the CNFM electrode has a specific capacitance of 272 F g at a current density of 1 A g with 74% of the specific capacitance retained at 50 A g in 2.0 M KOH electrolyte. The CNFM electrodes have excellent cycling durability with 100% capacitance retention after 10 000 cycles.
通过对聚丙烯腈和聚砜（PSF）的混合前驱体进行静电纺丝，随后进行预氧化稳定化和碳化，制备出碳纳米纤维毡（CNFMs）。由于PSF具有高分解温度、分解过程中释放SO以及碳化过程中大量的碳残留，添加PSF作为牺牲聚合物可得到具有高比表面积、大量微孔和介孔、良好碳化程度以及相互连接的纤维网络的CNFMs。电化学表征表明，在2.0 M KOH电解液中，CNFM电极在1 A g的电流密度下比电容为272 F g，在50 A g时仍保留74%的比电容。CNFM电极具有优异的循环耐久性，在10000次循环后电容保持率为100%。
