High porous bio-nanocarbons prepared by carbonization and NaOH activation of polysaccharides for electrode material of EDLC. (July 2018)

• Record Type: Journal Article
• Authors: Takeuchi, Kenji; Fujishige, Masatsugu; Ishida, Nobuaki; Kunieda, Yoshihiro; Kato, Yosuke; Tanaka, Yusuke; Ochi, Toshiyuki; Shirotori, Hisashi; Uzuhashi, Yuji; Ito, Suguru; Oshida, Kyo-ichi; Endo, Morinobu
• Is Part Of: Journal of physics and chemistry of solids. Volume 118(2018)
• Page Start: 137
• Page End: 143
• Publication Date: 2018-07
• Subjects: Polysaccharides -- Nanocarbon -- NaOH -- Activated carbon -- EDLC; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2018.02.050
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: Carbonization and post-activation of polysaccharides (utilized as food residue) created new bio-nanocarbons for the electrode of electric double layer capacitors (EDLC). Large specific capacitance (46.1 F/g, 26.4 F/cm 3 ) and high rate performance was confirmed under optimized conditions of carbonization temperature (600 °C) and supplied amount of sodium hydroxide in NaOH-activation process (250 wt %). The capacitance and rate performance were larger than the reported values, 42.9 F/g, 19.7 F/cm 3 of currently used activated carbon MSP-20. The feature that NaOH is usable as the activation agent, instead of KOH, is advantageous for reducing the cost of EDLC. Graphical abstract: Highlights: 1. NaOH activation of carbonized polysaccharides produced highly porous nanocarbon. 2. EDLC with nanocarbon-based electrode established large capacity. 3. NaOH as activation agent can be used in the activation process, instead of KOH.