ISIS Neutron and Muon Source Data Journal

Ion size effects in nanoporous supercapacitor materials

Abstract: Achieving net-zero emissions targets demands new methods for the efficient storage of energy from renewable sources. Electrochemical double-layer (EDL) supercapacitors are an important, emergent class of energy storage devices that can deliver much higher power densities than batteries. Recent studies have shown an anomalous increase in capacitance when the electrode carbon pores are similar in size to the electrolyte ions. It is therefore vital to understand how the relative size of pores to solvated ions effects solvation structure upon confinement, and how this effects the capacitive performance of the system. Building on our previous experiments measuring uptake of tetraethylammonium (TEA) cations in carbon pores we propose to study a series of tetra-alkylammonium cations of increasing size in 4 different activated carbons with different pore sizes and size distributions. Analysis of the data will reveal the uptake of these ions as a function of the pore size in the material.

Experimenter: Professor Taku Iiyama
Local Contact: Dr Tom Headen
Experimenter: Professor Chris Howard
Experimenter: Dr Ryusuke Futamura
Experimenter: Mr Syed Gilani

DOI: 10.5286/ISIS.E.RB2610646

ISIS Experiment Number: RB2610646

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Taku Iiyama et al; (2026): Ion size effects in nanoporous supercapacitor materials, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2610646

Data is released under the CC-BY-4.0 license.