Supercapacitor Electrodes Derived from Carbon Dioxide

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This work presents an unprecedented capacitive performance of porous carbons synthesized from carbon dioxide (CO2). CO2 is specifically converted to boron-doped porous carbons (BPCs) by reaction with sodium borohydride (NaBH4) at 1 atm and temperatures around 500 C. The pristine BPCs subsequently undergo treatment steps of salt removal and potassium hydroxide (KOH) activation. The activated BPCs provide specific capacitance of 130-140 F/g in a neutral solution of 1 M Na2SO4 after several thousand cycles. Main contributing factors to the high capacitance of the activated BPCs are their large surface area and well-defined micropores induced by the KOH activation. The observations have been elucidated by various spectroscopic and microscopic analyses.
Publisher
AMER CHEMICAL SOC
Issue Date
2014-04
Language
English
Article Type
Article
Keywords

DOUBLE-LAYER CAPACITOR; ELECTROCHEMICAL CAPACITORS; SURFACE-CHEMISTRY; GRAPHENE; PERFORMANCE; BATTERIES

Citation

ACS SUSTAINABLE CHEMISTRY & ENGINEERING, v.2, no.4, pp.735 - 740

ISSN
2168-0485
DOI
10.1021/sc400414r
URI
http://hdl.handle.net/10203/187285
Appears in Collection
CBE-Journal Papers(저널논문)
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