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Phosphorylated Graphene Monolith with High Mixed Proton/Electron Conductivity

Abstract

Mixed ionic-electronic conductor (MIEC) plays a crucial role in electrochemistry technologies relevant to energy conversion and storage. The exisiting composite materials often suffered from poor mixed conductive performance due to the distinct phase boundaries and random distributions of the transport channels. Herein, we propose the concept for the fabrication of single-phase MIEC using two-dimensional (2D) building blocks―phosphorylated graphene nanosheets, which are assembled into three-dimensional (3D) interconnected networks with long-range ordered nanochannels. Attributed to the sufficient proton carriers (phosphate groups) confined in electron-conductive nanochannels and the integration of conductive pathways, simultaneously enhanced proton conductivity (0.13 S cm-1) and electron conductivity (0.265 S cm-1) are achieved at 98% RH and 35 oC, surpassing the current performance of all graphene-based MIEC. This approach may pave the way for designing MIEC with high mixed conduction by utilizing the unique properties of 2D materials, beyond the limitations from pure proton-conducting/electron-conducting materials.

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Publication details

The article was received on 18 Mar 2018, accepted on 09 Apr 2018 and first published on 09 Apr 2018


Article type: Paper
DOI: 10.1039/C8TA02500B
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Phosphorylated Graphene Monolith with High Mixed Proton/Electron Conductivity

    L. Cao, H. Wu, Z. Mu, X. He, C. Wang, J. Li, Y. Li, M. Xu and Z. Jiang, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA02500B

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