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Herein, we report the development of a series of aromatic sulfonic acid\/graphene oxide hybrid membranes incorporating benzene sulfonic acid (BS), naphthalene sulfonic acid (NS), naphthalene disulfonic acid (DS) or pyrene sulfonic acid (PS) using a facile freeze dried method. For out\u2010of\u2010plane proton conductivity, the 3DGO\u2010BS and 3DGO\u2010NS yielded proton conductivities of 4.4\u00d710<jats:sup>\u22122<\/jats:sup>\u2005S\u2009cm<jats:sup>\u22121<\/jats:sup> and 3.1\u00d710<jats:sup>\u22122<\/jats:sup>\u2005S\u2009cm<jats:sup>\u22121<\/jats:sup>, respectively; this represents a two\u2010times higher value than that which occurs for three dimensional graphene oxide (3DGO). Additionally, the respective prepared films as membranes in a proton exchange membrane fuel cell (PEMFC) show maximum power density of 98.76\u2005mW\u2009cm<jats:sup>\u22122<\/jats:sup> for 3DGO\u2010NS while it is 92.75\u2005mW\u2009cm<jats:sup>\u22122<\/jats:sup> for 3DGO\u2010BS which are close to double that obtained for 3DGO (50\u2005mW\u2009cm<jats:sup>\u22122<\/jats:sup>).<\/jats:p>","DOI":"10.1002\/cplu.202200003","type":"journal-article","created":{"date-parts":[[2022,3,8]],"date-time":"2022-03-08T23:25:56Z","timestamp":1646781956000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["High Proton Conductivity of 3D Graphene Oxide Intercalated with Aromatic Sulfonic Acids"],"prefix":"10.1002","volume":"87","author":[{"given":"Mohammad","family":"Atiqur Rahman","sequence":"first","affiliation":[{"name":"Graduate School of Science and Technology Kumamoto University  2-39-1 Kurokami, Chuo-ku 860-8555 Kumamoto Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Md. 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