Performance of electrochemical double layer capacitors using highly porous activated carbons prepared from beer lees

Nanostructured activated carbons from natural precursors for electrical double layer capacitors

“…The wetting of the hydrophobic carbon surface in aqueous electrolyte solution can be poor. Therefore, the presence of oxygen-containing polar functional groups (hydroxyl, carboxyl, carbonyl, quinine and others) in ACs greatly increase their hydrophilicity and surface area accessible to aqueous electrolytes [59,73,108,113]. In addition to improved wetting, pseudocapacitance from selected functional groups may contribute to over 22% of the total capacitance [114].…”

Electrochemical properties of carbon from oil palm kernel shell for high performance supercapacitors

“…Chemical (ex: KOH, NaOH, ZnCl 2 ) and physical activation (ex: steam, CO 2 ) methods are routinely adopted for developing many biomass derived AC for EDLC application to enable specific capacitance (C S ) in the range 100 -370 F g -1 in aqueous electrolytes [14][15][16][17][18][19][20][21][22].…”

CO2adsorption characteristics of slit-pore shaped activated carbon prepared from cokes with high crystallinity

“…Activated carbon has been prepared from numerous carbonaceous source materials, such as walnut shells, coconut husk, tar pitch, and petroleum pitch. It has also been prepared from renewable resources, such as aluminum industry waste, bottom ash, peat, steel-plant slag, and beer lees [7,8]. In addition, activated carbon may be produced from pitch-based cokes, which may in turn be derived from waste generated during the carbon/carbon composite manufacturing process for highquality brake discs used in F1 automobiles and airplanes.…”