Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 115, Issue 42, Pages 20481-20486Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp207135g
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Funding
- U.S. NSF [DMR 09-06904]
- U.S. Department of Energy [DE-FG02-07ER46453, DE-FG02-07ER46471]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0906904] Funding Source: National Science Foundation
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Carbon microstructures fabricated by ultrasonic spray pyrolysis (USP) of aqueous precursors were tested as supercapacitors. USP carbons (USP-C) possess unique physicochemical characteristics, including substantial microporosity and high surface concentrations of oxygenated functional groups. We find that USP-Cs have higher electrochemical double-layer capacitance compared with other carbon structures. Porous carbon microspheres prepared from USP of lithium dichloroacetate, lithium/potassium propiolate, or sucrose produce electrochemical double layer capacitors (EDLCs) that have gravimetric capacitances of 185, 341, and 360 F/g, respectively. Microstructural and chemical analyses of the carbon materials suggest that the observed capacitance is related to the effects of surface functionality.
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