Solid-state amperometric CO2 sensor using a lithium-ion conductor

Ji Sun Lee, Jong Heun Lee, Seong Hyeon Hong

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


A solid-state amperometric CO2 sensor was fabricated by combining a Li+-ion conductor (Li2CO3-Li3PO4-Al2O3 ) with a porous layer and a Li2CO3 auxiliary layer deposited on sensing and counter electrodes, respectively. The Li+-ion pumping current increased linearly with increasing CO2 concentration ranging from 200 to 2000 ppm at 400 °C and the 90% response time was approximately 55 s. This sensor was able to reliably detect a small change in the CO2 concentration.

Original languageEnglish
Pages (from-to)311-314
Number of pages4
JournalSensors and Actuators, B: Chemical
Issue number3
Publication statusPublished - 2003 Apr 1
Externally publishedYes


  • Amperometric sensor
  • CO sensor
  • LiCO
  • LiCO-LiPO
  • Solid electrolyte

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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