Jung Kyung-Hye, Panapitiya Nimanka, Ferraris John P
Department of Advanced Materials and Chemical Engineering, Daegu Catholic University, Gyeongsan, Republic of Korea.
Nanotechnology. 2018 Jul 6;29(27):275701. doi: 10.1088/1361-6528/aabc9c. Epub 2018 Apr 9.
Carbon nanofibers (CNFs) are promising electrode materials for electrochemical double layer capacitors due to their high porosity and electrical conductivity. CNFs were prepared by electrospinning and subsequent thermal treatment of a new precursor polymer, 6FDA-durene, without the addition of pore generating agents. The conversion of precursor nanofibers into CNFs was confirmed using Raman spectroscopy. CNFs were activated and annealed, and nitrogen adsorption/desorption measurements were conducted to determine surface area and porosity. These activated/annealed CNFs were used as binderless electrodes in coin cells with an ionic liquid electrolyte. The devices displayed a specific capacitance of 128 F g, an energy density of 63.4 Wh kg (at 1 A g), and a power density of 11.0 KW kg (at 7 A g).
由于具有高孔隙率和导电性，碳纳米纤维（CNF）是用于电化学双层电容器的很有前景的电极材料。通过静电纺丝并随后对新型前体聚合物6FDA - 杜烯进行热处理来制备CNF，且不添加造孔剂。使用拉曼光谱确认了前体纳米纤维向CNF的转变。对CNF进行活化和退火，并进行氮吸附/脱附测量以确定表面积和孔隙率。这些活化/退火的CNF被用作具有离子液体电解质的硬币电池中的无粘合剂电极。该器件的比电容为128 F/g，能量密度为63.4 Wh/kg（在1 A/g时），功率密度为11.0 KW/kg（在7 A/g时）。
