Durability Improvement of Solid Electrolyte CO2 Sensor Against Humidity Variations

被引：8

作者：

Lee, Hyung-Kun ^{[1
]}

Choi, Nak-Jin ^{[1
]}

Moon, Seung Eon ^{[1
]}

Heo, Jin Ah ^{[1
]}

Yang, Woo Seok ^{[1
]}

Kim, Jongdae ^{[1
]}

机构：

[1] Elect & Telecommun Res Inst, Taejon 305700, South Korea

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2015年 / 15卷 / 01期

关键词：

Potentiometric CO2 Sensor; Carbonate Sensing Material; Durability to Humidity; CARBON-DIOXIDE SENSOR; SO2 GAS SENSORS; ELECTROCHEMICAL CO2; AUXILIARY PHASE; NASICON; TEMPERATURE;

D O I：

10.1166/jnn.2015.8360

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The sensing materials of potentiometric CO2 sensors utilize alkali/alkali-earth metal carbonates or their combinations. However, lithium carbonate easily responds to humidity resulting in incorrect information regarding CO2 concentration. Herein, the authors report a new sensing material combination (Li2CO3/BaCO3/LiOH/Ba(OH)(2) (1:2:0.05:0.1 molar ratio)) for a potentiometric CO2 sensor that is not affected by humidity. The electromotive force (EMF) of the sensor using a combination of Li2CO3, BaCO3, LiOH, and Ba(OH)(2) drifted by 1.5% when the relative humidity was changed from 25% to 70%, which is superior to a drift of 6% of a sensor using Li2CO3 and BaCO3, as this sensing material is known to be robust to changes in humidity.

引用

页码：404 / 407

页数：4

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