Carbon supercapacitors

Conference · Mon Nov 01 00:00:00 EST 1993

OSTI ID:10193535

Delnick, F M

Carbon supercapacitors are represented as distributed RC networks with transmission line equivalent circuits. At low charge/discharge rates and low frequencies these networks approximate a simple series R{sub ESR}C circuit. The energy efficiency of the supercapacitor is limited by the voltage drop across the ESR. The pore structure of the carbon electrode defines the electrochemically active surface area which in turn establishes the volume specific capacitance of the carbon material. To date, the highest volume specific capacitance reported for a supercapacitor electrode is 220F/cm{sup 3} in aqueous H{sub 2}SO{sub 4} (10) and {approximately}60 F/cm{sup 3} in nonaqueous electrolyte (8).

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 10193535
• Report Number(s): SAND-93-2421C; CONF-9311115-1; ON: DE94002652; BR: GB0103012
• Resource Relation: Conference: Symposium on science of advanced batteries,Cleveland, OH (United States),8-9 Nov 1993; Other Information: PBD: [1993]
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CAPACITORS
EQUIVALENT CIRCUITS
CARBON
MATERIALS
SPECIFICATIONS
ELECTRODES
ELECTROLYTES
CAPACITANCE
ELECTRIC IMPEDANCE
426000
COMPONENTS
ELECTRON DEVICES AND CIRCUITS