Highly confined ions store charge more efficiently in supercapacitors View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2013-12

AUTHORS

C. Merlet, C. Péan, B. Rotenberg, P. A. Madden, B. Daffos, P. -L. Taberna, P. Simon, M. Salanne

ABSTRACT

Liquids exhibit specific properties when they are adsorbed in nanoporous structures. This is particularly true in the context of supercapacitors, for which an anomalous increase in performance has been observed for nanoporous electrodes. This enhancement has been traditionally attributed in experimental studies to the effect of confinement of the ions from the electrolyte inside sub-nanometre pores, which is accompanied by their partial desolvation. Here we perform molecular dynamics simulations of realistic supercapacitors and show that this picture is correct at the microscopic scale. We provide a detailed analysis of the various environments experienced by the ions. We pick out four different adsorption types, and we, respectively, label them as edge, planar, hollow and pocket sites upon increase of the coordination of the molecular species by carbon atoms from the electrode. We show that both the desolvation and the local charge stored on the electrode increase with the degree of confinement. More... »

PAGES

2701

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/ncomms3701

DOI

http://dx.doi.org/10.1038/ncomms3701

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1033902670

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/24165568


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