Efficient preparation of porous carbons from coal tar pitch for high performance supercapacitors
Source abstract
Abstract
Porous carbons (PCs) for super capacitors were prepared from coal tar pitch by a one-step microwave-assisted KOH activation with low KOH consumption. The surface area of the PC (PC 2− M ) made at a KOH/pitch mass ratio of 2 with microwave heating for 30 min reaches 1786 m 2 /g. The electrochemical performance of the PC electrode for super capacitors was evaluated in different electrolytes including KOH, K 2 SO 4 , Na 2 SO 4 , Li 2 SO 4 in water, and tetraethylammonia tetrafluoroborate in propylene carbonate. The super capacitors have a high specific capacitance of 267 F/g in 6 M KOH aqueous electrolyte at 0.1 A/g and a high energy density of 12.0 W/kg at 1318 W/kg in a 0.5 M K 2 SO 4 neutral electrolyte. The one-step microwave-assisted KOH activation is a simple, efficient and low energy-consumption approach for the preparation of high performance PCs for super capacitors. [New Carbon Materials 2014, 29(6): 493–502]
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Supercapacitor Materials and Fabrication · Advanced battery technologies research · Advancements in Battery Materials
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