Solid Electrolyte Half-Cell Using Doped High-Entropy Oxide

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Solution Overview

Problem

Conventional ion-selective sensors with liquid or gel electrolytes suffer from leakage, toxicity, clogging, complex manufacturing, large form factor, mechanical fragility, and flow dependence, limiting their durability and applicability in compact environments.

Innovation Solution

An electrochemical half-cell with a solid electrolyte made of doped high-entropy oxide, which provides high conductivity and a compact design, minimizing projection into the measurement medium and enabling long operational life.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If liquid or gel electrolytes are used in ion-selective sensors, then ion conduction is enabled, but the sensors suffer from leakage, toxicity, clogging, and shortened service life

Engineering Contradiction:
Improveservice lifeVSAvoidleakage and toxicity
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the physical state of the electrolyte from liquid/gel to solid form. This fundamental parameter change eliminates leakage and toxicity issues while maintaining ion conduction capability through the solid electrolyte material, directly resolving the contradiction between reliability and harmful factors.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent replaces the liquid/gel electrolyte system with a solid electrolyte system. This substitution eliminates the mechanical issues of leakage and clogging associated with liquid/gel forms while maintaining the essential ion conduction function, thereby improving reliability without generating harmful factors.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If liquid or gel electrolytes are used in ion-selective sensors, then ion conduction is achieved, but the sensor form factor becomes large and introduction into small spaces is complicated

Engineering Contradiction:
Improveintroduction into measurement mediumVSAvoidsensor form factor
Core Design Contradiction:
Ease of operationVSVolume of moving object

Solution Approach 1:

By changing the electrolyte from liquid/gel to solid form, the patent achieves a more compact sensor design. The solid electrolyte enables miniaturization of the sensor form factor, making it easier to introduce into small measurement spaces such as single-use bags while maintaining operational functionality.

Inventive Principle:
Principle #35Parameter changes

3Ease of manufacture

If conventional sensors with liquid or gel electrolytes are used, then ion conduction is achieved, but manufacturing becomes complex and cost-intensive

Engineering Contradiction:
Improvemanufacturing complexityVSAvoidsensor durability
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The patent changes the electrolyte state to solid, which simplifies the manufacturing process by eliminating complex assembly requirements for liquid/gel containment. The solid electrolyte can be directly integrated into the sensor structure, reducing manufacturing complexity and costs while simultaneously improving sensor durability.

Inventive Principle:
Principle #35Parameter changes

4Measurement precision

If conventional sensors extend into the measurement medium, then measurement is enabled, but strong mechanical load is applied to the sensor

Engineering Contradiction:
Improvemeasurement capabilityVSAvoidmechanical load resistance
Core Design Contradiction:
Measurement precisionVSStrength

Solution Approach 1:

By changing to a solid electrolyte configuration, the patent enables a more robust sensor structure that can better withstand mechanical loads. The solid electrolyte provides structural integrity while maintaining measurement capability, reducing the mechanical stress on the sensor during operation.

Inventive Principle:
Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solid electrolyte ensures stable and precise measurements over extended periods with a minimized sensor form factor, allowing for non-invasive use in small spaces and reducing manufacturing complexity.

Implementation Method 1

a solid electrolyte (14), in particular a solid electrolyte with a doped high-entropy oxide, for ion conduction

Methodology Applied
Scientific EffectIon conduction: Conduction (electrical)

Data Source

PatentUS12352718B2Electrochemical half-cell, electrochemical sensor, manufacturing method of solid electrolyte and electrochemical half-cell, and use of solid electrolyte in electrochemical half-cell
Publication Date: 2025.07.08 ENDRESS HAUSER CONDUCTA GMBH CO KG
  • US12352718B2 patent drawing
  • US12352718B2 patent drawing
  • US12352718B2 patent drawing

AI summary

An electrochemical half-cell includes an electrical terminal lead in contact with a solid electrolyte, wherein the solid electrolyte includes a doped high-entropy oxide. The electrochemical half-cell can be used as either a reference half-cell or a measuring half-cell. Methods of manufacturing the solid electrolyte and the electrochemical half-cell are further disclosed.