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

A. Banerjee, P. Suresh Kumar, A. K. Shukla

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


[Figure not available: see fulltext.] 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.

Original languageEnglish
Pages (from-to)1177-1183
Number of pages7
JournalJournal of Chemical Sciences
Issue number5
StatePublished - Sep 2013
Externally publishedYes

Bibliographical note

Funding Information:
Financial support from the Department of Science and Technology (DST), Government of India and Indian Institute of Science (IISc), Bangalore under its Energy Storage Systems Initiative (ESSI) are gratefully acknowledged. AB thanks the Council of Scientific and Industrial Research (CSIR), New Delhi for a Senior Research Fellowship.


  • Electrical-double-layer capacitor
  • carbon inks
  • electrodes microstructure
  • pore-size distribution
  • specific capacitance


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