A high-energy-density mixed-aprotic-aqueous sodium-air cell with a ceramic separator and a porous carbon electrode

Feng Liang; Katsuro Hayashi

doi:10.1149/2.0421507jes

A high-energy-density mixed-aprotic-aqueous sodium-air cell with a ceramic separator and a porous carbon electrode

Feng Liang, Katsuro Hayashi

Research output: Contribution to journal › Article › peer-review

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Abstract

A mixed aqueous/aprotic Na-air cell that works at room temperature has been fabricated and its discharge properties have been examined experimentally as a primary cell. A dense Na₃Zr₂Si₂PO₁₂ ceramic with an ionic conductivity of 1.3 × 10^-3 S·Ecm^-1 at 25°C and a porous electrode containing Mn₃O₄ catalyzed carbon are used as a solid electrolyte separator and an air electrode, respectively. This cell gives a maximum output power density of 21 mW·Ecm^-2 at 25°C, which is one of the best results among alkali metal-air cells reported to date. Electrochemical impedance spectroscopy reveals that a reduction in ohmic resistivity of the ceramic separator is now crucial for a further increase in power density.

Original language	English
Pages (from-to)	A1215-A1219
Journal	Journal of the Electrochemical Society
Volume	162
Issue number	7
DOIs	https://doi.org/10.1149/2.0421507jes
Publication status	Published - 2015

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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10.1149/2.0421507jes

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abstract = "A mixed aqueous/aprotic Na-air cell that works at room temperature has been fabricated and its discharge properties have been examined experimentally as a primary cell. A dense Na3Zr2Si2PO12 ceramic with an ionic conductivity of 1.3 × 10-3 S·Ecm-1 at 25°C and a porous electrode containing Mn3O4 catalyzed carbon are used as a solid electrolyte separator and an air electrode, respectively. This cell gives a maximum output power density of 21 mW·Ecm-2 at 25°C, which is one of the best results among alkali metal-air cells reported to date. Electrochemical impedance spectroscopy reveals that a reduction in ohmic resistivity of the ceramic separator is now crucial for a further increase in power density.",

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AB - A mixed aqueous/aprotic Na-air cell that works at room temperature has been fabricated and its discharge properties have been examined experimentally as a primary cell. A dense Na3Zr2Si2PO12 ceramic with an ionic conductivity of 1.3 × 10-3 S·Ecm-1 at 25°C and a porous electrode containing Mn3O4 catalyzed carbon are used as a solid electrolyte separator and an air electrode, respectively. This cell gives a maximum output power density of 21 mW·Ecm-2 at 25°C, which is one of the best results among alkali metal-air cells reported to date. Electrochemical impedance spectroscopy reveals that a reduction in ohmic resistivity of the ceramic separator is now crucial for a further increase in power density.

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A high-energy-density mixed-aprotic-aqueous sodium-air cell with a ceramic separator and a porous carbon electrode

Abstract

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