Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 11, Issue 11, Pages 3069-3074Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ee01723a
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Funding
- Max Planck Society
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Extending the range of analysis of previous measurements on energy storage in ionic liquid (IL)-based supercapacitors with very well defined carbon materials indicates that there are two distinct processes at play: the one at lower voltages is (classically) related to the micropore inclusion of single ions, while a previously unknown high voltage transition can be ascribed to a change in the structure and coordination number of the ionic liquid. This opinion article discusses a proof of circumstantial evidence for this so far weakly understood and often overlooked mode of energy storage, which in principle could take supercapacitors to a new level of energy storage.
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