NaClO4 Ethylene Glycol–Water Binary Solution as an Electrolyte for Aqueous Sodium Ion Batteries
Aqueous Na-ion batteries are attracting attention as candidates for large-scale rechargeable batteries with a high safety level. We proposed a novel electrolyte composed of NaClO4 dissolved in water, along with ethylene glycol, to serve as an innovative solution for aqueous Na-ion batteries. The pot...
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| Format: | Article |
| Language: | English |
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The Electrochemical Society of Japan
2023-11-01
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| Series: | Electrochemistry |
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| Online Access: | https://www.jstage.jst.go.jp/article/electrochemistry/91/11/91_23-00086/_html/-char/en |
| _version_ | 1827630262677143552 |
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| author | Ayuko KITAJOU Tatsuya MITSUYASU Tetsuro NAGAI Koji YOSHIDA Wataru KOBAYASHI |
| author_facet | Ayuko KITAJOU Tatsuya MITSUYASU Tetsuro NAGAI Koji YOSHIDA Wataru KOBAYASHI |
| author_sort | Ayuko KITAJOU |
| collection | DOAJ |
| description | Aqueous Na-ion batteries are attracting attention as candidates for large-scale rechargeable batteries with a high safety level. We proposed a novel electrolyte composed of NaClO4 dissolved in water, along with ethylene glycol, to serve as an innovative solution for aqueous Na-ion batteries. The potential window of NaClO4 aqueous-based electrolyte expanded as the ethylene glycol concentration increased. Specifically, when incorporating ethylene glycol into a 7 m (= mol kg−1) NaClO4 aqueous electrolyte, we observed a favorable cyclability pattern in the context of the NaTi2(PO4)3 anode, akin to that exhibited by a 17 m NaClO4 aqueous electrolyte. Moreover, the irreversible capacity of NaTi2(PO4)3 decreased as the ethylene glycol concentration increased. This effect was evident even at low rates such as 0.2 mA cm−2. Notably, the NaTi2(PO4)3 anode’s capacity, when utilizing a 7 m NaClO4 solution with a higher fraction of ethylene glycol (XE = 0.5), remained stable at 120 mAh g−1 even after the completion of 15 cycles. On the other hand, the Na2MnP2O7 cathode properties 7 m NaClO4 aqueous electrolyte could not be improved by adding a small amount of ethylene glycol. |
| first_indexed | 2024-03-09T14:03:25Z |
| format | Article |
| id | doaj.art-f15c587090b34c029e54c1d9ab647524 |
| institution | Directory Open Access Journal |
| issn | 2186-2451 |
| language | English |
| last_indexed | 2024-03-09T14:03:25Z |
| publishDate | 2023-11-01 |
| publisher | The Electrochemical Society of Japan |
| record_format | Article |
| series | Electrochemistry |
| spelling | doaj.art-f15c587090b34c029e54c1d9ab6475242023-11-30T06:15:01ZengThe Electrochemical Society of JapanElectrochemistry2186-24512023-11-01911111700211700210.5796/electrochemistry.23-00086electrochemistryNaClO4 Ethylene Glycol–Water Binary Solution as an Electrolyte for Aqueous Sodium Ion BatteriesAyuko KITAJOU0https://orcid.org/0000-0002-7639-2990Tatsuya MITSUYASU1Tetsuro NAGAI2https://orcid.org/0000-0002-8685-4220Koji YOSHIDA3Wataru KOBAYASHI4Graduate School of Sciences and Technology for Innovation, Yamaguchi UniversityDepartment of Chemistry, Faculty of Science, Fukuoka UniversityDepartment of Chemistry, Faculty of Science, Fukuoka UniversityDepartment of Chemistry, Faculty of Science, Fukuoka UniversityTosoh CorporationAqueous Na-ion batteries are attracting attention as candidates for large-scale rechargeable batteries with a high safety level. We proposed a novel electrolyte composed of NaClO4 dissolved in water, along with ethylene glycol, to serve as an innovative solution for aqueous Na-ion batteries. The potential window of NaClO4 aqueous-based electrolyte expanded as the ethylene glycol concentration increased. Specifically, when incorporating ethylene glycol into a 7 m (= mol kg−1) NaClO4 aqueous electrolyte, we observed a favorable cyclability pattern in the context of the NaTi2(PO4)3 anode, akin to that exhibited by a 17 m NaClO4 aqueous electrolyte. Moreover, the irreversible capacity of NaTi2(PO4)3 decreased as the ethylene glycol concentration increased. This effect was evident even at low rates such as 0.2 mA cm−2. Notably, the NaTi2(PO4)3 anode’s capacity, when utilizing a 7 m NaClO4 solution with a higher fraction of ethylene glycol (XE = 0.5), remained stable at 120 mAh g−1 even after the completion of 15 cycles. On the other hand, the Na2MnP2O7 cathode properties 7 m NaClO4 aqueous electrolyte could not be improved by adding a small amount of ethylene glycol.https://www.jstage.jst.go.jp/article/electrochemistry/91/11/91_23-00086/_html/-char/enaqueous na ion batterieswater-ethylene glycol binary solutionnati2(po4)3 anoderelaxation time of water molecules |
| spellingShingle | Ayuko KITAJOU Tatsuya MITSUYASU Tetsuro NAGAI Koji YOSHIDA Wataru KOBAYASHI NaClO4 Ethylene Glycol–Water Binary Solution as an Electrolyte for Aqueous Sodium Ion Batteries Electrochemistry aqueous na ion batteries water-ethylene glycol binary solution nati2(po4)3 anode relaxation time of water molecules |
| title | NaClO4 Ethylene Glycol–Water Binary Solution as an Electrolyte for Aqueous Sodium Ion Batteries |
| title_full | NaClO4 Ethylene Glycol–Water Binary Solution as an Electrolyte for Aqueous Sodium Ion Batteries |
| title_fullStr | NaClO4 Ethylene Glycol–Water Binary Solution as an Electrolyte for Aqueous Sodium Ion Batteries |
| title_full_unstemmed | NaClO4 Ethylene Glycol–Water Binary Solution as an Electrolyte for Aqueous Sodium Ion Batteries |
| title_short | NaClO4 Ethylene Glycol–Water Binary Solution as an Electrolyte for Aqueous Sodium Ion Batteries |
| title_sort | naclo4 ethylene glycol water binary solution as an electrolyte for aqueous sodium ion batteries |
| topic | aqueous na ion batteries water-ethylene glycol binary solution nati2(po4)3 anode relaxation time of water molecules |
| url | https://www.jstage.jst.go.jp/article/electrochemistry/91/11/91_23-00086/_html/-char/en |
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