Engineered carbon fiber papers as flexible binder-free electrodes for high-performance capacitive energy storage

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) Vol. 59; pp. 277 - 285
• Main Authors: Kim, Wan-Jin, Ko, Tae Hoon, Seo, Min-Kang, Chung, Yong-Sik, Kim, Hak-Yong, Kim, Byoung-Suhk
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.03.2018; 한국공업화학회
• Subjects: Binder-free; Carbon fiber papers; Flexible electrode; Supercapacitor; 화학공학; Supercapacitor; Flexible electrode; Carbon fiber papers; Binder-free
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2017.10.033

[Display omitted] •Core/shell structured flexible carbon fiber paper electrodes are prepared.•The O2 activation effects of the core/shell strucuted carbon fibers is studied.•It delivers the highest specific capacitance of 156.9Fg−1.•It shows the excellent cyclic stability with retention of 90.2% after 5000 cycles. A binder-free electrode for flexible supercapacitor applications was fabricated using carbon fiber papers (CFPs) via a facile paper making method. CV curves and galvanostatic charge/discharge profiles exhibited ideal capacitive behavior and linear voltage–time function with small IR drop. O2 activation process greatly affected the porosity and surface structures. The CFP electrodes activated at 325°C for 45min by O2 oxidizing gas showed highest specific capacitance of 156.9Fg−1 and excellent cycle stability (∼90.2%) after 5000 cycles at 1.0Ag−1 in 1.0M H2SO4, which presented the possibilities as flexible electrodes with excellent electrochemical performances for EDLCs.