Liquid electrolyte for an electrochemical gas sensor

US11828720B2 · kind B2 · utility

Assignee

• DRÄGER SAFETY AG & CO. KGAA · DE

Inventors

• Andreas Nauber · Wulfen, DE
• Michael Sick · Timmendorfer Strand, DE
• Gregor Steiner · Titisee, DE
• Marie-Isabell Mattern-Frühwald · Bargteheide, DE
• Rigobert Chrzan · Bad Oldesloe, DE
• Sabrina Sommer · Wulfen, DE
• Frank Mett · Lübeck, DE
• Andreas Hengstenberg · Reinfeld, DE

Key dates

• Filing date: Dec 2, 2020
• Grant date: Nov 28, 2023
• Expiry date: Feb 21, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A50/20
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A liquid electrolyte, for an electrochemical gas sensor for detecting NH3 or gas mixtures containing NH3, contains at least one solvent, one conductive salt and/or one organic mediator. The conductive salt is an ionic liquid, an inorganic salt, an organic salt or a mixture thereof. The electrolyte preferably is comprised of (I) water, propylene carbonate, ethylene carbonate or a mixture thereof as solvent; (ii) LiCl, KCl, tetrabutylammonium toluenesulphonate or 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate as conductive salt; and (iii) tert-butylhydroquinone or anthraquinone-2-sulphonate as organic mediator.