Increase in Capacitance by Subnanometer Pores in Carbon

Nicolas Jäckel (1, 2) , Patrice Simon (3, 4) , Yury Gogotsi (5) , Volker Presser (1, 2)

1 INM - Leibniz Institute for New Materials
2 Saarland University [Saarbrücken]
3 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
4 RS2E - Réseau sur le stockage électrochimique de l'énergie
5 Drexel University

This Viewpoint clarifies the correlation between capacitance and pore size in electrical double-layer capacitors (EDLCs, also known as supercapacitors or ultracapacitors), which is of high practical importance for the design of advanced carbon electrode materials. Two extreme cases are obvious: excessively large pores, accompanied by large pore volumes and limited specific surface area, will lead to a low energy storage capacity, whereas very small pores will limit the ion access due to steric effects, in addition to imposing obstacles to ion transport

Mots clés: Apacitance; Subnanometer Pores

Domaines: Matériaux; Matériaux

Nicolas Jäckel, Patrice Simon, Yury Gogotsi, Volker Presser. Increase in Capacitance by Subnanometer Pores in Carbon. ACS Energy Letters, 2016, 1 (6), pp.1262-1265. ⟨10.1021/acsenergylett.6b00516⟩. ⟨hal-01528359⟩