Anomalous Proton Blocking Property of Pore-Free Graphene Oxide Membrane.

Autor: Tsugawa T; Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan., Hatakeyama K; Institute of Industrial Nanomaterials (IINa), Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan., Koinuma M; Institute of Industrial Nanomaterials (IINa), Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan., Moriyama N; Chemsical Engineering Program, Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, 739-8527, Japan., Ida S; Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, 860-8555, Japan.; Center for Energy Systems Design (CESD), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Nov; Vol. 20 (47), pp. e2400707. Date of Electronic Publication: 2024 Aug 25.
DOI: 10.1002/smll.202400707
Abstrakt: Graphene oxide (GO) has been attracting intensive attention as a flexible barrier film, however, provides no barrier for proton transfer due to its out-of-plane proton conductivity (10 -6  S cm -1 ) based on nanoscale defects with oxygen functional groups. In this study, it is reported that a pore-free GO (Pf-GO) membrane with controlled oxygen functional groups exhibits unexpected proton blocking behavior (10 -11  S cm -1 ). Proton permeation tests conducted in aqueous solution demonstrate that proton permeation is below the detection limit, and lithium metal foils coated with the Pf-GO show higher chemical stability to water than those coated with previously reported GO. The Pf-GO has periodic honeycomb atomic structure, which is found to impart the Pf-GO membrane with novel performance characteristics distinct from those of conventional GO.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
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