Solid Electrolyte Coulometric Titration Cell
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Solution Overview
Problem
Existing coulometric titration cells are large, expensive, and produce gases during operation, making them unsuitable for compact and cost-effective applications.
Innovation Solution
A compact coulometric titration cell design featuring a solid or solidified electrolyte with a redox system that suppresses gas development, using non-noble metal electrodes and a diaphragm for controlled charge and material transport, allowing for both acid and base titrations without electrolyte changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional liquid electrolytes and noble metal electrodes are used in coulometric titration cells, then reliable electrochemical reactions can be achieved, but the device becomes large, expensive, and produces harmful gases
Solution Approach 1:
The patent changes the physical state of the electrolyte from liquid to solid (solidified electrolyte), which fundamentally alters the electrochemical system's behavior. This parameter change eliminates gas bubble formation and improves reliability by preventing electrode degradation from gas evolution, directly resolving the contradiction between reliability and harmful gas production
Solution Approach 2:
The patent replaces expensive noble metal electrodes (platinum, gold) with inexpensive base metal electrodes (steel, stainless steel, aluminum). This substitution reduces cost significantly while the solidified electrolyte protects these less durable electrodes, allowing them to function reliably without the gas production problems that would otherwise limit their lifespan
2Adaptability or versatility
If conventional coulometric titration cell designs are used, then electrochemical titrations can be performed, but the device size becomes large and expensive
Solution Approach 1:
The patent changes the electrolyte from liquid to solid state, which eliminates the need for large containment volumes and complex sealing arrangements. The solidified electrolyte allows for a compact cell design while maintaining full electrochemical functionality, directly resolving the contradiction between versatility and compact size
Solution Approach 2:
The patent designs a universal cell that can perform both acid and base titrations using the same solidified electrolyte and electrode configuration. This multi-functionality is achieved through the stable, versatile solid electrolyte system that doesn't require separate compartments or electrode setups for different titration types, enabling compact design without sacrificing adaptability
3Use of energy by moving object
If liquid electrolytes are used in coulometric titration cells, then ionic conduction is efficient, but gas development occurs during operation
Solution Approach 1:
The patent changes the electrolyte from liquid to solid state, which eliminates gas bubble formation at electrodes while maintaining ionic conduction through the solid matrix. The solidified structure prevents gas accumulation and allows efficient ion transport without the harmful gas development associated with liquid electrolytes, directly resolving this contradiction
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 design results in a small, cost-effective, and gas-free coulometric titration cell capable of flexible operation as either an acid or base generator, with reduced gas production and the ability to perform titrations using a solid electrolyte and non-noble metal electrodes.
Implementation Method 1
the electrolyte, which is solid or solidified, contains the first redox partner
Implementation Method 2
a redox system with a first and second redox partner
Implementation Method 3
a diaphragm which is disposed between the first and second electrochemical half-cell
Data Source
AI summary
A cell and/or a measuring instrument are arranged for coulometric titration. The cell has first and second electrochemical half-cells, each of which is connected into a regulated circuit and each of which has an associated electrode. The second electrode (3) is immersed in an electrolyte (2) that is solid or solidified and fills a second housing (1). The second housing is closed, with charge and material exchange only possible through a diaphragm (4) that is disposed between the respective electrochemical half-cells. The electrolyte contains a first redox partner that, along with at least one second redox partner, is part of a redox system. The redox partners are selected to substantially suppress gas development inside the cell during operation. The first electrode and the second housing are disposed in a first housing so that at least the diaphragm and the first electrode are in contact with a sample during operation.