This paper summarizes the research trends in the field of energy devices, which the authors call "supercapacitors," focusing on electrolytes, especially liquid salts. This kind of energy storage device is of great importance for solving future energy problems, and it is significant to publish the review paper. It is considered worthy of publication after revision on the points pointed out below.

1. The problem is that there are very few citations to recent REVIEWs of hybrid capacitors. How about citing the following paper, for example?
   (1) Wang, H.; Zhu, C.; Chao, D.; Yan, Q.; Fan, H. J. Nonaqueous Hybrid Lithium-Ion and Sodium-Ion Capacitors. Advanced Materials 2017, 29 (46). DOI: 10.1002/adma.201702093 From NLM PubMed-not-MEDLINE.
   (2) Ding, J.; Hu, W.; Paek, E.; Mitlin, D. Review of Hybrid Ion Capacitors: From Aqueous to Lithium to Sodium. Chemical Reviews 2018, 118 (14), 6457-6498. DOI: 10.1021/acs.chemrev.8b00116 From NLM PubMed-not-MEDLINE.
   (3) Gao, X.; Wu, H.; Su, C.; Lu, C.; Dai, Y.; Zhao, S.; Hu, X.; Zhao, F.; Zhang, W.; Parkin, I. P.; et al. Recent advances in carbon-based nanomaterials for multivalent-ion hybrid capacitors: a review. Energy & Environmental Science 2023, 16 (4), 1364-1383. DOI: 10.1039/d2ee03719j.
2. The names and abbreviations of ionic liquids should be unified. It is inevitable that each paper has a different notation, but if it is to be a single paper as a Review, the notation should be unified. For example, N-methyl-N-propylpyrrolidinium and 1-methyl-1-propylpyrrolidinium are the same compound, and abbreviations are used in various forms, such as C3mpy, PMPyrr, and Pyr13. The anions are also described in different ways. Readers who specialize in ionic liquids will easily understand them, but the rest of the readers will have difficulty.
3. On line 15 of P.9, the "(" before Ca is missing.
4. The following paper should be cited in the description of aqueous electrolyte on P.10, which is a representative result of recent water-concentrated systems: Yamada, Y.; Usui, K.; Sodeyama, K.; Ko, S.; Tateyama, Y.; Yamada, A. Hydrate- melt electrolytes for high-energy-density aqueous batteries. Nature Energy 2016, 1 (10), 1-9.
5. On P.11, line 10, there is "as quoted by Merck" but no reference. Please add it.
6. On P.24, line 20, the electrolyte in ref 44 is wrong. Please revise it.
7. How about adding the following paper on ionic liquids in potassium battery systems on P.24?
   Yoshii, K.; Masese, T.; Kato, M.; Kubota, K.; Senoh, H.; Shikano, M. Sulfonylamide‐Based Ionic Liquids for High‐Voltage Potassium‐Ion Batteries with Honeycomb Layered Cathode Oxides. ChemElectroChem 2019, 6 (15), 3901-3910. DOI: 10.1002/celc.201900689.
8. How about adding the following paper to the calcium section on P.26?
   Gao, X. P.; Liu, X.; Mariani, A.; Elia, G. A.; Lechner, M.; Streb, C.; Passerini, S. Alkoxy-functionalized ionic liquid electrolytes: understanding ionic coordination of calcium ion speciation for the rational design of calcium electrolytes. Energy & Environmental Science 2020, 13 (8), 2559-2569. DOI: 10.1039/d0ee00831a.
9. Third line from the bottom of P. 27. either => ether
10. It has been known that the introduction of ether groups in the side chains of ILs is effective to reduce the viscosity long before. How about adding the following review paper?
    Tang, S.; Baker, G. A.; Zhao, H. Ether- and alcohol-functionalized task-specific ionic liquids: attractive properties and applications. Chemical Society Reviews 2012, 41, 4030-4066. DOI: 10.1039/c2cs15362a.
11. On P.29, line 6. Soshi et al => Shiraishi et al
12. On P.39. I don't understand what you mean by "Although the surface Al ion conductivity in SEI can be improved." Doesn't SEI form in the dissolution and precipitation of Al in ionic liquids?
13. It is up to the author to decide where to cite, but the following paper, a pioneering paper on lithium metal in ionic liquids, should be used as a reference.
    Sakaebe, H.; Matsumoto, H. N-Methyl-N-propylpiperidinium bis(trifluoromethanesulfonyl)imide (PP13–TFSI) – novel electrolyte base for Li battery. Electrochemistry Communications 2003, 5 (7), 594-598. DOI: 10.1016/s1388-2481(03)00137-1.

The authors have responded sincerely to the reviewers' comments. It is considered worthy of publication at this time.