Structural disorder determines capacitance in nanoporous carbons - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Science Année : 2024

Structural disorder determines capacitance in nanoporous carbons

Xinyu Liu
Dongxun Lyu
Xiao Hua
Zhen Xu
Clare P Grey
Alexander C Forse

Résumé

The difficulty in characterizing the complex structures of nanoporous carbon electrodes has led to a lack of clear design principles with which to improve supercapacitors. Pore size has long been considered the main lever to improve capacitance. However, our evaluation of a large series of commercial nanoporous carbons finds a lack of correlation between pore size and capacitance. Instead, nuclear magnetic resonance spectroscopy measurements and simulations reveal a strong correlation between structural disorder in the electrodes and capacitance. More disordered carbons with smaller graphene-like domains show higher capacitances owing to the more efficient storage of ions in their nanopores. Our findings suggest ways to understand and exploit disorder to achieve highly energy-dense supercapacitors.

Domaines

Matériaux
Fichier principal
Vignette du fichier
Liu24-accepted.pdf (821.41 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence

Dates et versions

hal-04650660 , version 1 (16-07-2024)

Licence

Identifiants

Citer

Xinyu Liu, Dongxun Lyu, Céline Merlet, Matthew J A Leesmith, Xiao Hua, et al.. Structural disorder determines capacitance in nanoporous carbons. Science, 2024, 384 (6693), pp.321-325. ⟨10.1126/science.adn6242⟩. ⟨hal-04650660⟩

Collections

CIRIMAT
0 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More