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Issue 44, 2019
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Flexible, transparent ion-conducting membranes from two-dimensional nanoclays of intrinsic conductivity

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Abstract

The recent boom in human–machine interaction has triggered a significant demand for flexible and transparent ionotronics. State-of-the-art ion conductors are built by embedding electrolytes in a transparent gel polymer to form an ion-conducting composite, named ion conductive hydrogels or ionogels. Herein, we demonstrate an intrinsic ion-conducting membrane with ultrahigh ion conductivity, flexibility and transparency based on two-dimensional nanoclays of intrinsic conductivity (NICs). The inherently charged and ordered laminar microstructure exhibits an ultrahigh ion conductivity of 0.45 S cm−1 at 80 °C without external electrolytes, which is 100–1000 times higher than that of state-of-the-art ion-conducting composites. The NICs membranes also exhibit superior stability against harsh conditions including organic solvents, high temperature and prolonged dehydration–hydration cycles. We further demonstrate a NICs touch panel that can realize real-time, human–machine communication by drawing and typing. The nanoclays with intrinsic conductivity may open an avenue to electrolyte-free transparent and flexible ionotronics.

Graphical abstract: Flexible, transparent ion-conducting membranes from two-dimensional nanoclays of intrinsic conductivity

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Publication details

The article was received on 20 Aug 2019, accepted on 27 Oct 2019 and first published on 28 Oct 2019


Article type: Paper
DOI: 10.1039/C9TA09140H
J. Mater. Chem. A, 2019,7, 25657-25664

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    Flexible, transparent ion-conducting membranes from two-dimensional nanoclays of intrinsic conductivity

    L. Cao, H. Wu, X. He, H. Geng, R. Zhang, M. Qiu, P. Yang, B. Shi, N. A. Khan and Z. Jiang, J. Mater. Chem. A, 2019, 7, 25657
    DOI: 10.1039/C9TA09140H

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