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Issue 1, 2016

Pressing a spring: what does it take to maximize the energy storage in nanoporous supercapacitors?

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Abstract

We discuss the nonlinear effects and efficiency of charge storage in supercapacitors with nanoporous electrodes and ionic liquids, and demonstrate that to maximize the stored energy, it may be beneficial to create ‘obstacles’ or ‘difficulties’ in charging. This can be achieved by making thermodynamically unfavourable conditions for ions inside nanopores, or more favourable outside. We show by means of Monte Carlo simulations that such ‘ionophobic’ pores store energy more efficiently and can provide equivalent or even better energy capacity. Since the recent analysis predicts much faster charging of ionophobic nanopores, we conclude that such pores offer a better option for simultaneous energy/power optimization.

Graphical abstract: Pressing a spring: what does it take to maximize the energy storage in nanoporous supercapacitors?

Article information


Submitted
02 Jun 2015
Accepted
06 Aug 2015
First published
16 Sep 2015

Nanoscale Horiz., 2016,1, 45-52
Article type
Communication

Pressing a spring: what does it take to maximize the energy storage in nanoporous supercapacitors?

S. Kondrat and A. A. Kornyshev, Nanoscale Horiz., 2016, 1, 45 DOI: 10.1039/C5NH00004A

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