Performance evaluation on mass transport in cathode-side molybdenum electrodes for a low-temperature-type AMTEC cell

Kotaro Tanaka, Toshio Nakagiri, Takahiro Fujii, Takeo Honda

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The mass transport characteristics of sodium in cathode-side electrodes strongly influence the overall output performance of the alkali metal thermal-to-electric converter (AMTEC). At temperatures above 1100K, the rapid degradation of molybdenum electrode performance with time has been reported. On the other hand, a high initial performance may be maintained for much longer at lower operating temperatures. In this paper, measured performance of the molybdenum electrode in the temperature range of 900 to 1050K and time dependence of the performance are discussed. The sodium exposure test cell (SETC) was used to measure the electrode morphological dimensionless factor, G, which can be calculated from the limiting current in the current-voltage curve. G was observed to become approximately 20 after 150 h of operation at 904K. The analysis based on the experimental results shows that the molybdenum electrode operating at 900K has a predicted output power density of 0.12W/cm2 and its performance is about 50% higher than that of the conventional titanium nitride electrode.

Original languageEnglish
Pages (from-to)73-78
Number of pages6
JournalKagaku Kogaku Ronbunshu
Volume30
Issue number1
DOIs
Publication statusPublished - 2004 Jan
Externally publishedYes

Fingerprint

Electric converters
Alkali Metals
Molybdenum
Alkali metals
Cathodes
Mass transfer
Electrodes
Temperature
Sodium
Titanium nitride
Hot Temperature
Degradation
Electric potential

Keywords

  • AMTEC
  • Direct Energy Conversion
  • Thermoelectric Converter

ASJC Scopus subject areas

  • Materials Science (miscellaneous)

Cite this

Performance evaluation on mass transport in cathode-side molybdenum electrodes for a low-temperature-type AMTEC cell. / Tanaka, Kotaro; Nakagiri, Toshio; Fujii, Takahiro; Honda, Takeo.

In: Kagaku Kogaku Ronbunshu, Vol. 30, No. 1, 01.2004, p. 73-78.

Research output: Contribution to journalArticle

@article{841858ed43db4723a47794cfacb10e1e,
title = "Performance evaluation on mass transport in cathode-side molybdenum electrodes for a low-temperature-type AMTEC cell",
abstract = "The mass transport characteristics of sodium in cathode-side electrodes strongly influence the overall output performance of the alkali metal thermal-to-electric converter (AMTEC). At temperatures above 1100K, the rapid degradation of molybdenum electrode performance with time has been reported. On the other hand, a high initial performance may be maintained for much longer at lower operating temperatures. In this paper, measured performance of the molybdenum electrode in the temperature range of 900 to 1050K and time dependence of the performance are discussed. The sodium exposure test cell (SETC) was used to measure the electrode morphological dimensionless factor, G, which can be calculated from the limiting current in the current-voltage curve. G was observed to become approximately 20 after 150 h of operation at 904K. The analysis based on the experimental results shows that the molybdenum electrode operating at 900K has a predicted output power density of 0.12W/cm2 and its performance is about 50{\%} higher than that of the conventional titanium nitride electrode.",
keywords = "AMTEC, Direct Energy Conversion, Thermoelectric Converter",
author = "Kotaro Tanaka and Toshio Nakagiri and Takahiro Fujii and Takeo Honda",
year = "2004",
month = "1",
doi = "10.1252/kakoronbunshu.30.73",
language = "English",
volume = "30",
pages = "73--78",
journal = "Kagaku Kogaku Ronbunshu",
issn = "0386-216X",
publisher = "Society of Chemical Engineers, Japan",
number = "1",

}

TY - JOUR

T1 - Performance evaluation on mass transport in cathode-side molybdenum electrodes for a low-temperature-type AMTEC cell

AU - Tanaka, Kotaro

AU - Nakagiri, Toshio

AU - Fujii, Takahiro

AU - Honda, Takeo

PY - 2004/1

Y1 - 2004/1

N2 - The mass transport characteristics of sodium in cathode-side electrodes strongly influence the overall output performance of the alkali metal thermal-to-electric converter (AMTEC). At temperatures above 1100K, the rapid degradation of molybdenum electrode performance with time has been reported. On the other hand, a high initial performance may be maintained for much longer at lower operating temperatures. In this paper, measured performance of the molybdenum electrode in the temperature range of 900 to 1050K and time dependence of the performance are discussed. The sodium exposure test cell (SETC) was used to measure the electrode morphological dimensionless factor, G, which can be calculated from the limiting current in the current-voltage curve. G was observed to become approximately 20 after 150 h of operation at 904K. The analysis based on the experimental results shows that the molybdenum electrode operating at 900K has a predicted output power density of 0.12W/cm2 and its performance is about 50% higher than that of the conventional titanium nitride electrode.

AB - The mass transport characteristics of sodium in cathode-side electrodes strongly influence the overall output performance of the alkali metal thermal-to-electric converter (AMTEC). At temperatures above 1100K, the rapid degradation of molybdenum electrode performance with time has been reported. On the other hand, a high initial performance may be maintained for much longer at lower operating temperatures. In this paper, measured performance of the molybdenum electrode in the temperature range of 900 to 1050K and time dependence of the performance are discussed. The sodium exposure test cell (SETC) was used to measure the electrode morphological dimensionless factor, G, which can be calculated from the limiting current in the current-voltage curve. G was observed to become approximately 20 after 150 h of operation at 904K. The analysis based on the experimental results shows that the molybdenum electrode operating at 900K has a predicted output power density of 0.12W/cm2 and its performance is about 50% higher than that of the conventional titanium nitride electrode.

KW - AMTEC

KW - Direct Energy Conversion

KW - Thermoelectric Converter

UR - http://www.scopus.com/inward/record.url?scp=3142743935&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=3142743935&partnerID=8YFLogxK

U2 - 10.1252/kakoronbunshu.30.73

DO - 10.1252/kakoronbunshu.30.73

M3 - Article

VL - 30

SP - 73

EP - 78

JO - Kagaku Kogaku Ronbunshu

JF - Kagaku Kogaku Ronbunshu

SN - 0386-216X

IS - 1

ER -