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Influence of binder solvent on carbon-layer structure in electrical-double-layer capacitors

Banerjee, A and Kumar, Suresh P and Shukla, AK (2013) Influence of binder solvent on carbon-layer structure in electrical-double-layer capacitors. In: JOURNAL OF CHEMICAL SCIENCES, 125 (5). pp. 1177-1183.

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Official URL: http://dx.doi.org/10.1007/s12039-013-0494-7


Porous activated-carbons with a large surface-area have been the most common materials for electrical-double-layer capacitors (EDLCs). These carbons having a wide pore distribution ranges from micropores to macropores in conjunction with a random pore connection that facilitates the high specific-capacitance values. Pore distribution plays a central role in controlling the capacitance value of EDLCs, since electrolyte distribution inside the active material mainly depends on the pore distribution. This has a direct influence on the distribution of resistance and capacitance values within the electrode. As a result, preparation of electrodes remains a vital issue in realising high-performance EDLCs. Generally, carbon materials along with some binders are dispersed into a solvent and coated onto the current collectors. This study examines the role of binder solvents used for the carbon-ink preparation on the microstructure of the electrodes and the consequent performance of the EDLCs. It is observed that the physical properties of the binder solvent namely its dielectric constant, viscosity and boiling point have important role in determining the pore-size distribution as well as the microstructure of electrodes which influence their specific capacitance values.

Item Type: Journal Article
Additional Information: Copyright for their article belongs to INDIAN ACAD SCIENCES, C V RAMAN AVENUE, SADASHIVANAGAR, P B #8005, BANGALORE 560 080, INDIA
Keywords: Electrical-double-layer capacitor; specific capacitance; electrodes microstructure; pore-size distribution; carbon inks
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 16 Dec 2013 06:50
Last Modified: 16 Dec 2013 06:50
URI: http://eprints.iisc.ac.in/id/eprint/47902

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