Two-dimensional distribution of sodium polysulfide composition in sulfur electrodes of sodium-sulfur cells

研究成果: Article

3 引用 (Scopus)

抄録

Distributions of the sodium polysulfide composition in the sulfur electrode of the soldium-sulfur cell and the current density in the cell are investigated using a two-dimensional and two-component (ionic and electronic) conduction model. The following points are clarified from the results of calculations and experiences. (i) The polarization of a vertically supported cell at the end of charge start partially from the upper surface of the solid electrolyte due to the gravitational drop of the sodium polysulfide melt, but the polarization at the end of discharge is axially almost uniform. (ii) A duel mat design of which a porous graphite mat has a high electric resistance adjacent to the electrolyte is preferable for improving the rechargeability. (iii) An oriented mat of which the radial resistivity is smaller than the axial resistivity is able to reduce the cell resistance. (iv) The larger the current density is, the larger the nonuniformity of the melt composition becomes, and the sulfur utilization is reduced by the high current density operation (v) Voids of the melt at the electrolyte surface accelerate the degradation of the solid electrolyte and reduce the sulfur utilization. (vi) Voids at the metal container side accelerate the corrosion of the metal container.

元の言語English
ページ(範囲)1851-1860
ページ数10
ジャーナルJournal of the Electrochemical Society
136
発行部数7
出版物ステータスPublished - 1989 7
外部発表Yes

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polysulfides
Polysulfides
Sulfur
sulfur
Sodium
sodium
Electrodes
Current density
electrodes
Solid electrolytes
solid electrolytes
current density
cells
Chemical analysis
containers
Electrolytes
Containers
voids
Metals
electrolytes

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

これを引用

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title = "Two-dimensional distribution of sodium polysulfide composition in sulfur electrodes of sodium-sulfur cells",
abstract = "Distributions of the sodium polysulfide composition in the sulfur electrode of the soldium-sulfur cell and the current density in the cell are investigated using a two-dimensional and two-component (ionic and electronic) conduction model. The following points are clarified from the results of calculations and experiences. (i) The polarization of a vertically supported cell at the end of charge start partially from the upper surface of the solid electrolyte due to the gravitational drop of the sodium polysulfide melt, but the polarization at the end of discharge is axially almost uniform. (ii) A duel mat design of which a porous graphite mat has a high electric resistance adjacent to the electrolyte is preferable for improving the rechargeability. (iii) An oriented mat of which the radial resistivity is smaller than the axial resistivity is able to reduce the cell resistance. (iv) The larger the current density is, the larger the nonuniformity of the melt composition becomes, and the sulfur utilization is reduced by the high current density operation (v) Voids of the melt at the electrolyte surface accelerate the degradation of the solid electrolyte and reduce the sulfur utilization. (vi) Voids at the metal container side accelerate the corrosion of the metal container.",
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T1 - Two-dimensional distribution of sodium polysulfide composition in sulfur electrodes of sodium-sulfur cells

AU - Kawamoto, Hiroyuki

PY - 1989/7

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N2 - Distributions of the sodium polysulfide composition in the sulfur electrode of the soldium-sulfur cell and the current density in the cell are investigated using a two-dimensional and two-component (ionic and electronic) conduction model. The following points are clarified from the results of calculations and experiences. (i) The polarization of a vertically supported cell at the end of charge start partially from the upper surface of the solid electrolyte due to the gravitational drop of the sodium polysulfide melt, but the polarization at the end of discharge is axially almost uniform. (ii) A duel mat design of which a porous graphite mat has a high electric resistance adjacent to the electrolyte is preferable for improving the rechargeability. (iii) An oriented mat of which the radial resistivity is smaller than the axial resistivity is able to reduce the cell resistance. (iv) The larger the current density is, the larger the nonuniformity of the melt composition becomes, and the sulfur utilization is reduced by the high current density operation (v) Voids of the melt at the electrolyte surface accelerate the degradation of the solid electrolyte and reduce the sulfur utilization. (vi) Voids at the metal container side accelerate the corrosion of the metal container.

AB - Distributions of the sodium polysulfide composition in the sulfur electrode of the soldium-sulfur cell and the current density in the cell are investigated using a two-dimensional and two-component (ionic and electronic) conduction model. The following points are clarified from the results of calculations and experiences. (i) The polarization of a vertically supported cell at the end of charge start partially from the upper surface of the solid electrolyte due to the gravitational drop of the sodium polysulfide melt, but the polarization at the end of discharge is axially almost uniform. (ii) A duel mat design of which a porous graphite mat has a high electric resistance adjacent to the electrolyte is preferable for improving the rechargeability. (iii) An oriented mat of which the radial resistivity is smaller than the axial resistivity is able to reduce the cell resistance. (iv) The larger the current density is, the larger the nonuniformity of the melt composition becomes, and the sulfur utilization is reduced by the high current density operation (v) Voids of the melt at the electrolyte surface accelerate the degradation of the solid electrolyte and reduce the sulfur utilization. (vi) Voids at the metal container side accelerate the corrosion of the metal container.

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