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Effect of pore morphology on the electrochemical properties of electric double layer carbon cryogel supercapacitors
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10.1063/1.2949263
/content/aip/journal/jap/104/1/10.1063/1.2949263
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/1/10.1063/1.2949263

Figures

Image of FIG. 1.
FIG. 1.

Equivalent circuit used to measure bulk effect of electrolyte.

Image of FIG. 2.
FIG. 2.

XRS of various pyrolyzed and activated CCs compared to graphite.

Image of FIG. 3.
FIG. 3.

Isotherms of samples with various and activations.

Image of FIG. 4.
FIG. 4.

DA distribution (A) and BJH distribution form adsorption isotherm (B).

Image of FIG. 5.
FIG. 5.

SEM images of A-70 (A), C-70 (B), and C-36 (C).

Image of FIG. 6.
FIG. 6.

(A) Volumetric capacitance as a function of , data were measured using the GC (connected points) and by CV (free points). (B) Galvanic discharge at an applied current of .

Image of FIG. 7.
FIG. 7.

Nyquist plot. (A) high frequency data and CNLS fit. (B) Low frequency data.

Image of FIG. 8.
FIG. 8.

The imaginary volumetric capacitance (A) and real volumetric capacitance (B).

Image of FIG. 9.
FIG. 9.

Complex power curves, the normalized reactive power reaches 100% for all samples while the dissipative active power fails to vanish for samples C-36 and C-70.

Image of FIG. 10.
FIG. 10.

Randles circuit used to measure bulk effect of electrolyte.

Image of FIG. 11.
FIG. 11.

Alternate plots of high frequency data using the Randles circuit instead.

Tables

Generic image for table
Table I.

Catalyst amount and activation percentage used to process the cryogels (resorcinol to water ratio for all ).

Generic image for table
Table II.

BET SA and micro- and mesopore data (nomenclature in Appendix B)

Generic image for table
Table III.

Volumetric SA and percent of micro-, meso- and macropores to the total area .

Generic image for table
Table IV.

Maximum capacitance and power using galvanic cycling at and (nomenclature Appendix B).

Generic image for table
Table V.

Relation between pore size, relaxation time, power dissipation, and bulk properties (nomenclature in Appendix B).

Generic image for table
Table VI.

Comparison of values obtained between the circuit used by the author and Randles.

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/content/aip/journal/jap/104/1/10.1063/1.2949263
2008-07-08
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of pore morphology on the electrochemical properties of electric double layer carbon cryogel supercapacitors
http://aip.metastore.ingenta.com/content/aip/journal/jap/104/1/10.1063/1.2949263
10.1063/1.2949263
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