NASICON-based CO2 sensor operative at room temperature using Li2CO3-BaCO3 auxiliary phase

Kenji Obata, Kengo Shimanoe, Norio Miura, Noboru Yamazoe

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A solid state CO2 sensor operative at room temperature, developed by incorporating a metal oxide sensing electrode and a metal carbonate auxiliary phase into a NASICON (Na3Zr2Si2PO12)-based electrochemical cell, suffers from a humidity-dependent shift of the EMF response to CO2. In an attempt to reduce the humidity dependence, binary carbonate systems of Li2CO3-BaCO3 and Na2CO3-BaCO3 at various compositions were tested for the auxiliary phase of the device. The melting-and-quenching method conventionally used for attaching the carbonate was not applicable well to the present type device due to the corrosion of NASICON surface. The humidity-least dependent device could be obtained when the Li2CO3-BaCO3 composite (1:2 in molar ratio) was adhered to NASICON by calcination at 500°C (non melting method). The device could respond to 300-3000 ppm CO2 quite well almost independent of relative humidity (RH) beyond 30%. In the lower range of RH, however, the EMF response commenced to shift and the CO2 sensing capability was completely lost in the dry atmosphere. A planar type CO2 sensor was fabricated successfully, which could work stably under the conditions of 30% RH and above.

Original languageEnglish
Pages (from-to)496-502
Number of pages7
JournalElectrochemistry
Volume71
Issue number6
Publication statusPublished - Jun 2003

Fingerprint

Atmospheric humidity
Carbonates
Sensors
Temperature
Melting
Metals
Solid-state sensors
Electrochemical cells
Electric potential
Calcination
Oxides
Quenching
Corrosion
Electrodes
Composite materials
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Electrochemistry

Cite this

NASICON-based CO2 sensor operative at room temperature using Li2CO3-BaCO3 auxiliary phase. / Obata, Kenji; Shimanoe, Kengo; Miura, Norio; Yamazoe, Noboru.

In: Electrochemistry, Vol. 71, No. 6, 06.2003, p. 496-502.

Research output: Contribution to journalArticle

Obata, Kenji ; Shimanoe, Kengo ; Miura, Norio ; Yamazoe, Noboru. / NASICON-based CO2 sensor operative at room temperature using Li2CO3-BaCO3 auxiliary phase. In: Electrochemistry. 2003 ; Vol. 71, No. 6. pp. 496-502.
@article{9b92730744c143c38fdb3cdc388c43bb,
title = "NASICON-based CO2 sensor operative at room temperature using Li2CO3-BaCO3 auxiliary phase",
abstract = "A solid state CO2 sensor operative at room temperature, developed by incorporating a metal oxide sensing electrode and a metal carbonate auxiliary phase into a NASICON (Na3Zr2Si2PO12)-based electrochemical cell, suffers from a humidity-dependent shift of the EMF response to CO2. In an attempt to reduce the humidity dependence, binary carbonate systems of Li2CO3-BaCO3 and Na2CO3-BaCO3 at various compositions were tested for the auxiliary phase of the device. The melting-and-quenching method conventionally used for attaching the carbonate was not applicable well to the present type device due to the corrosion of NASICON surface. The humidity-least dependent device could be obtained when the Li2CO3-BaCO3 composite (1:2 in molar ratio) was adhered to NASICON by calcination at 500°C (non melting method). The device could respond to 300-3000 ppm CO2 quite well almost independent of relative humidity (RH) beyond 30{\%}. In the lower range of RH, however, the EMF response commenced to shift and the CO2 sensing capability was completely lost in the dry atmosphere. A planar type CO2 sensor was fabricated successfully, which could work stably under the conditions of 30{\%} RH and above.",
author = "Kenji Obata and Kengo Shimanoe and Norio Miura and Noboru Yamazoe",
year = "2003",
month = "6",
language = "English",
volume = "71",
pages = "496--502",
journal = "Electrochemistry",
issn = "1344-3542",
publisher = "The Electrochemical Society of Japan",
number = "6",

}

TY - JOUR

T1 - NASICON-based CO2 sensor operative at room temperature using Li2CO3-BaCO3 auxiliary phase

AU - Obata, Kenji

AU - Shimanoe, Kengo

AU - Miura, Norio

AU - Yamazoe, Noboru

PY - 2003/6

Y1 - 2003/6

N2 - A solid state CO2 sensor operative at room temperature, developed by incorporating a metal oxide sensing electrode and a metal carbonate auxiliary phase into a NASICON (Na3Zr2Si2PO12)-based electrochemical cell, suffers from a humidity-dependent shift of the EMF response to CO2. In an attempt to reduce the humidity dependence, binary carbonate systems of Li2CO3-BaCO3 and Na2CO3-BaCO3 at various compositions were tested for the auxiliary phase of the device. The melting-and-quenching method conventionally used for attaching the carbonate was not applicable well to the present type device due to the corrosion of NASICON surface. The humidity-least dependent device could be obtained when the Li2CO3-BaCO3 composite (1:2 in molar ratio) was adhered to NASICON by calcination at 500°C (non melting method). The device could respond to 300-3000 ppm CO2 quite well almost independent of relative humidity (RH) beyond 30%. In the lower range of RH, however, the EMF response commenced to shift and the CO2 sensing capability was completely lost in the dry atmosphere. A planar type CO2 sensor was fabricated successfully, which could work stably under the conditions of 30% RH and above.

AB - A solid state CO2 sensor operative at room temperature, developed by incorporating a metal oxide sensing electrode and a metal carbonate auxiliary phase into a NASICON (Na3Zr2Si2PO12)-based electrochemical cell, suffers from a humidity-dependent shift of the EMF response to CO2. In an attempt to reduce the humidity dependence, binary carbonate systems of Li2CO3-BaCO3 and Na2CO3-BaCO3 at various compositions were tested for the auxiliary phase of the device. The melting-and-quenching method conventionally used for attaching the carbonate was not applicable well to the present type device due to the corrosion of NASICON surface. The humidity-least dependent device could be obtained when the Li2CO3-BaCO3 composite (1:2 in molar ratio) was adhered to NASICON by calcination at 500°C (non melting method). The device could respond to 300-3000 ppm CO2 quite well almost independent of relative humidity (RH) beyond 30%. In the lower range of RH, however, the EMF response commenced to shift and the CO2 sensing capability was completely lost in the dry atmosphere. A planar type CO2 sensor was fabricated successfully, which could work stably under the conditions of 30% RH and above.

UR - http://www.scopus.com/inward/record.url?scp=0041672230&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0041672230&partnerID=8YFLogxK

M3 - Article

VL - 71

SP - 496

EP - 502

JO - Electrochemistry

JF - Electrochemistry

SN - 1344-3542

IS - 6

ER -