Effect of Concentrated Electrolyte on Aqueous Sodium-ion Battery with Sodium Manganese Hexacyanoferrate Cathode
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- NAKAMOTO Kosuke
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
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- SAKAMOTO Ryo
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
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- ITO Masato
- Institute for Materials Chemistry and Engineering, Kyushu University
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- KITAJOU Ayuko
- Institute for Materials Chemistry and Engineering, Kyushu University
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- OKADA Shigeto
- Institute for Materials Chemistry and Engineering, Kyushu University
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From the viewpoint of the cost and safety, aqueous sodium-ion batteries are attractive candidate for large-scale energy storage. Although the operating voltage range of the aqueous battery is theoretically limited to 1.23 V by the electrochemical decomposition of water, the voltage restriction is a little bit eased in real aqueous battery system by the charge/discharge overvoltage. Effect of the concentrated electrolyte on the operation voltage was studied in aqueous Na-ion battery with Na2MnFe(CN)6 hexacyanoferrates cathode and NaTi2(PO4)3 NASICON-type anode, in order to increase the discharge voltage. According to the cyclic voltammetry, the electrochemical window of diluted 1 mol kg−1 NaClO4 aqueous electrolyte is only 1.9 V, whereas the corresponding electrochemical window of concentrated 17 mol kg−1 NaClO4 aqueous electrolyte is widen to 2.8 V. This wide electrochemical window of the concentrated aqueous electrolyte allows the Na2MnFe(CN)6//NaTi2(PO4)3 aqueous sodium-ion system to work reversibly. By contrast, the framework of Na2MnFe(CN)6 cathode was destroyed by the hydroxide anion generated in diluted 1 mol kg−1 electrolyte.
収録刊行物
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- Electrochemistry
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Electrochemistry 85 (4), 179-185, 2017
公益社団法人 電気化学会
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詳細情報 詳細情報について
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- CRID
- 1390001206498619136
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- NII論文ID
- 130005549015
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- NII書誌ID
- AN00151637
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- ISSN
- 21862451
- 13443542
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- NDL書誌ID
- 028095412
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
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- 使用可