A Trifluoroacetate-based Concentrated Electrolyte for Symmetrical Aqueous Sodium-ion Battery with NASICON-type Na2VTi(PO4)3 Electrodes
A safe and low-cost aqueous electrolyte, in which maximum amount of sodium trifluoroacetate (NaTFA) is dissolved (26 mol kg−1), showed high ionic conductivity of 23 mS cm−1 and provided wide electrochemical stability window of 3.1 V. These attractive features may originate from so-called “water-in-s...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
The Electrochemical Society of Japan
2021-09-01
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| Series: | Electrochemistry |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/electrochemistry/89/5/89_21-00056/_pdf/-char/en |
| Summary: | A safe and low-cost aqueous electrolyte, in which maximum amount of sodium trifluoroacetate (NaTFA) is dissolved (26 mol kg−1), showed high ionic conductivity of 23 mS cm−1 and provided wide electrochemical stability window of 3.1 V. These attractive features may originate from so-called “water-in-salt” effect of the highly concentrated electrolyte in addition to a robust fluoride layer formed on anode thereof. This novel electrolyte enabled reversible operation of NASICON-type Na2VTi(PO4)3 as symmetrical operation based on V3+/4+ at cathode and Ti3+/4+ and V2+/3+ at anode, respectively. |
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| ISSN: | 2186-2451 |