期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 34, 期 26, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-648X/ac6307
关键词
supercapacitors; nanostructured electrodes; superionic state; re-entrant phase transitions; Bethe-lattice
资金
- European Unions Horizon 2020 Research and Innovation Programmes under the Marie Skodowska-Curie Grant [734276]
- National Academy of Sciences of Ukraine [KPiKBK 6541230]
- Polish National Agency for Academic Exchange via 'Solidarity with scientists Initiative' [PPN/SZN/2020/1/00027]
Analytical models for capacitive energy storage in nanopores have gained increasing interest for their ability to provide detailed insights into charging mechanisms. This study shows that next-nearest interactions enhance capacitance and stored energy densities and may significantly impact the phase behavior of confined ionic liquids.
Analytical models for capacitive energy storage in nanopores attract growing interest as they can provide in-depth analytical insights into charging mechanisms. So far, such approaches have been limited to models with nearest-neighbor interactions. This assumption is seemingly justified due to a strong screening of inter-ionic interactions in narrow conducting pores. However, how important is the extent of these interactions? Does it affect the energy storage and phase behavior of confined ionic liquids? Herein, we address these questions using a two-dimensional lattice model with next-nearest and further neighbor interactions developed to describe ionic liquids in conducting slit confinements. With simulations and analytical calculations, we find that next-nearest interactions enhance capacitance and stored energy densities and may considerably affect the phase behavior. In particular, in some range of voltages, we reveal the emergence of large-scale mesophases that have not been reported before but may play an important role in energy storage.
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