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

Svyatoslav Kondrat | Zendy; Alexei A. Kornyshev | Zendy

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

Author(s) -

Svyatoslav Kondrat,

Alexei A. Kornyshev

Publication year - 2015

Publication title -

nanoscale horizons

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.992

H-Index - 38

eISSN - 2055-6764

pISSN - 2055-6756

DOI - 10.1039/c5nh00004a

Subject(s) - supercapacitor , nanoporous , nanopore , energy storage , monte carlo method , materials science , energy (signal processing) , spring (device) , ion , nonlinear system , nanotechnology , power (physics) , ionic bonding , electrode , capacitance , chemistry , physics , engineering , mechanical engineering , thermodynamics , statistics , mathematics , organic chemistry , quantum mechanics

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.

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