Estimation of sodium sulfur cell characteristics using computed tomograms from high energy X-rays

Journal Article · Thu Jun 01 04:00:00 EDT 1995 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.2044216· OSTI ID:82921

Tokoi, Hiromi; Izumi, Shigeru; Satoh, Katsutoshi ^[1]

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1. Hitachi, Ltd., Ibaraki (Japan). Energy Research Lab.

The density distributions in the axial and radial cross sections of two typical sodium sulfur cells were obtained by a high-energy X-ray computed tomography (CT) system with a linear accelerator. The tomograms of the low-resistance cell showed a uniform density distribution of sulfur and sodium pentasulfide in the graphite felt of the sulfur electrode, while those of the high-resistance one were indicative of a nonuniform density distribution. The difference in the cell characteristics between the cells could be accounted for by the difference in the density distribution of the active material in the sulfur electrode. The low discharge voltage of the high-resistance cell, calculated using an internal-parallel-cell model, agreed well with experimental results. The tomograms of cells taken by X-ray CT can be applied to evaluate sodium sulfur cell characteristics.

• OSTI ID: 82921
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 6 Vol. 142; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
COMPUTERIZED TOMOGRAPHY
DENSITY
ELECTRIC CONDUCTIVITY
LOAD MANAGEMENT
PERFORMANCE
POWER GENERATION
SODIUM-SULFUR BATTERIES