Electrochemical deposition of zeolitic imidazolate framework electrode coatings for supercapacitor electrodes

Worrall, S.D., Mann, H., Rogers, A., Bissett, M.A., Attfield, M.P. and Dryfe, R.A.W. (2016). Electrochemical deposition of zeolitic imidazolate framework electrode coatings for supercapacitor electrodes. Electrochimica Acta, 197 , pp. 228-240.

Abstract

Zn and Co electrodes have been successfully coated with five different zeolitic imidazolate frameworks ZIFs (ZIF-4, ZIF-7, ZIF-8, ZIF-14 and ZIF-67) via the anodic dissolution method. Careful control of the reaction conditions allows for electrode coating growth; in contrast to previous reports of electrochemical ZIF growth, which have not succeeded in obtaining ZIF electrode coatings. Coating crystallinity is also shown to be heavily dependent upon reaction conditions, with amorphous rather than crystalline material generated at shorter reaction times and lower linker concentrations. Electrochemical applications for ZIF-coated electrodes are highlighted with the observation of an areal capacitance of 10.45 mF cm−2 at 0.01 V s−1 for additive-free ZIF-67 coated Co electrodes. This is superior to many reported metal organic framework (MOF)/graphene composites and to capacitance values previously reported for additive-free MOFs.

Publication DOI: https://doi.org/10.1016/j.electacta.2016.02.145
Divisions: Engineering & Applied Sciences > Chemical Engineering & Applied Chemistry
Engineering & Applied Sciences
Additional Information: © 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Full Text Link: http://www.scop ... tnerID=MN8TOARS
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Published Date: 2016-04-10
Authors: Worrall, S.D. ( 0000-0003-1969-3671)
Mann, H.
Rogers, A.
Bissett, M.A.
Attfield, M.P.
Dryfe, R.A.W.

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