Sensor interrogation
US-9410940-B2 · Aug 9, 2016 · US
Electrochemical oxygen sensor
US2021255135A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021255135-A1 |
| Application number | US-201817273553-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 17, 2018 |
| Priority date | Oct 17, 2018 |
| Publication date | Aug 19, 2021 |
| Grant date | — |
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- Title
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Abstract
Official abstract text for this publication.
An electrochemical oxygen sensor with a long service life is provided. The electrochemical oxygen sensor according to the present invention includes a positive electrode, a negative electrode, and an electrolyte solution, and the electrolyte solution contains a chelating agent and ammonia, and a concentration of the ammonia in the electrolyte solution is 0.01 mol/L or higher. Citric acid is preferable as the chelating agent contained in the electrolyte solution. Also, the negative electrode preferably contains an Sn alloy.
First claim
Opening claim text (preview).
1 . An electrochemical oxygen sensor comprising: a positive electrode; a negative electrode; and an electrolyte solution, wherein the electrolyte solution comprises a chelating agent and ammonia, and wherein a concentration of the ammonia in the electrolyte solution is 0.01 mol/L or higher. 2 . The electrochemical oxygen sensor according to claim 1 , wherein a concentration of the chelating agent in the electrolyte solution is 2.3 mol/L or higher. 3 . The electrochemical oxygen sensor according to claim 1 , wherein the electrolyte solution further comprises an alkali metal salt of the chelating agent. 4 . The electrochemical oxygen sensor according to claim 1 , wherein citric acid is included as the chelating agent. 5 . The electrochemical oxygen sensor according to claim 4 , wherein the electrolyte solution has a pH of 3.5 to 5.75. 6 . The electrochemical oxygen sensor according to claim 1 , wherein the negative electrode comprises Sn an Sn alloy. 7 . The electrochemical oxygen sensor according to claim 1 , wherein the negative electrode comprises an Sn alloy, and wherein the Sn alloy comprises at least one element selected from the group consisting of Ag, Cu, and Sb. 8 . The electrochemical oxygen sensor according to claim 1 , wherein the electrolyte solution further comprises at least one selected from the group consisting of acetic acid, boric acid, phosphoric acid, and salts thereof.
Assignees
Inventors
Classifications
- G01N27/404Primary
Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid {, e.g. Clark-type oxygen sensors} · CPC title
Electrodes, e.g. test electrodes; Half-cells (G01N27/414 takes precedence) · CPC title
- G01N27/413Primary
Concentration cells using liquid electrolytes {measuring currents or voltages in voltaic cells} · CPC title
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- What does patent US2021255135A1 cover?
- An electrochemical oxygen sensor with a long service life is provided. The electrochemical oxygen sensor according to the present invention includes a positive electrode, a negative electrode, and an electrolyte solution, and the electrolyte solution contains a chelating agent and ammonia, and a concentration of the ammonia in the electrolyte solution is 0.01 mol/L or higher. Citric acid is pre…
- Who is the assignee on this patent?
- Maxell Ltd
- What technology area does this patent fall under?
- Primary CPC classification G01N27/404. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Aug 19 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).