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Visualization of ion transport in Nafion using electrochemical strain microscopy
Suran Kim1, Kwangsoo No2, Seungbum Hong1
1Material Science Division, Argonne National Laboratory, Lemont, 60439, IL, USA. hong@anl.gov and Department of Material Science and Engineering, KAIST, Daejeon, 305-701, Korea. ksno@kaist.ac.kr.
Abstract:
The electromechanical response of a Nafion membrane immersed in water was probed using electrochemical strain microscopy (ESM) to redistribute protons and measure the resulting local strain that is caused by the movement of protons. We also measured the relaxation of protons from the surface resulting from proton diffusion. Using this technique, we can visualize and analyze the local strain change resulting from the redistribution and relaxation of hydrated protons.
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