Rational design of efficient electrode–electrolyte interfaces for solid-state energy storage using ion soft landing

Venkateshkumar Prabhakaran, B. Layla Mehdi, Jeffrey J. Ditto, Mark H. Engelhard, Bingbing Wang, K. Don D. Gunaratne, David C. Johnson, Nigel D. Browning, Grant E. Johnson and Julia Laskin ()
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Venkateshkumar Prabhakaran: Pacific Northwest National Laboratory
B. Layla Mehdi: Pacific Northwest National Laboratory
Jeffrey J. Ditto: University of Oregon
Mark H. Engelhard: Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory
Bingbing Wang: Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory
K. Don D. Gunaratne: Pacific Northwest National Laboratory
David C. Johnson: University of Oregon
Nigel D. Browning: Pacific Northwest National Laboratory
Grant E. Johnson: Pacific Northwest National Laboratory
Julia Laskin: Pacific Northwest National Laboratory

Nature Communications, 2016, vol. 7, issue 1, 1-10

Abstract: Abstract The rational design of improved electrode–electrolyte interfaces (EEI) for energy storage is critically dependent on a molecular-level understanding of ionic interactions and nanoscale phenomena. The presence of non-redox active species at EEI has been shown to strongly influence Faradaic efficiency and long-term operational stability during energy storage processes. Herein, we achieve substantially higher performance and long-term stability of EEI prepared with highly dispersed discrete redox-active cluster anions (50 ng of pure ∼0.75 nm size molybdenum polyoxometalate (POM) anions on 25 μg (∼0.2 wt%) carbon nanotube (CNT) electrodes) by complete elimination of strongly coordinating non-redox species through ion soft landing (SL). Electron microscopy provides atomically resolved images of a uniform distribution of individual POM species soft landed directly on complex technologically relevant CNT electrodes. In this context, SL is established as a versatile approach for the controlled design of novel surfaces for both fundamental and applied research in energy storage.

Date: 2016
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DOI: 10.1038/ncomms11399

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