Materials analysis reveals increased capacitance in subnanometer carbon pores, suggesting design pathways to optimize energy storage in electrical double-layer capacitors.
Electrical double-layer capacitors (EDLCs, also known as supercapacitors or ultracapacitors) store energy by electrosorption of ions at the electrode/electrolyte interface. In addition, to achieve a high-energy storage capacity, electrodes with a high surface area and well-developed pore structure in the range from several Angstroms to several tens of nanometers are required.
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Jäckel et al. (2016) studied this question.
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