Control of Edge/in-Plane Interactions toward Robust, Highly Proton Conductive Graphene Oxide Membranes

Benbing Shi, Hong Wu, Jianliang Shen, Li Cao, Xueyi He, Yu Ma, Yan Li, Jinzhao Li, Mingzhao Xu, Xunli Mao, Ming Qiu, Haobo Geng, Pengfei Yang, Zhongyi Jiang

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

Graphene oxide (GO) membrane, bearing well-aligned interlayer nanochannels and well-defined physicochemical properties, promises fast proton transport. However, the deficiency of proton donor groups on the basal plane of GO and weak interlamellar interactions between the adjacent nanosheets often cause low proton conduction capability and poor water stability. Herein, we incorporate sulfonated graphene quantum dots (SGQD) into GO membrane to solve the above dilemma via synergistically controlling the edge electrostatic interaction and in-plane π-πinteraction of SGQD with GO nanosheets. SGQD with three different kinds of electron-withdrawing groups are employed to modulate the edge electrostatic interactions and improve the water swelling resistant property of GO membranes. Meanwhile, SGQD with abundant proton donor groups assemble on the sp2 domain of GO via in-plane π-πinteraction and confer the GO membranes with low-energy-barrier proton transport channels. As a result, the GO membrane achieves an enhanced proton conductivity of 324 mS cm-1, maximum power density of 161.6 mW cm-2, and superior water stability when immersed into water for one month. This study demonstrates a strategy for independent manipulation of conductive function and nonconductive function to fabricate high-performance proton exchange membranes.
Original languageEnglish (US)
Pages (from-to)10366-10375
Number of pages10
JournalACS Nano
Volume13
Issue number9
DOIs
StatePublished - Sep 24 2019
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Materials Science(all)
  • Engineering(all)

Fingerprint

Dive into the research topics of 'Control of Edge/in-Plane Interactions toward Robust, Highly Proton Conductive Graphene Oxide Membranes'. Together they form a unique fingerprint.

Cite this