Interchangeable Electrochemical Substrate Holder for Harsh Environments
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Solution Overview
Problem
Existing electrochemical assemblies are limited in their ability to accommodate various flat substrate materials for study, particularly in harsh chemical environments and elevated temperatures, and often restrict the use of three-electrode configurations, which limits experimental control and the range of electrochemical measurements that can be performed.
Innovation Solution
A multi-component assembly using electrically-insulating polytetrafluoroethylene (PTFE) or ceramic fiber gaskets within a stainless steel or high-nickel alloy housing, allowing for the rapid exchange of substrates and accommodating various geometries, temperatures (up to 600°C), and configurations, including 2- or 3-electrode systems, with optional temperature control and radiation applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If commercially-available noble metal planar disc electrodes are used, then electrochemical behavior at planar geometry can be observed, but researchers are confined to specific substrate types and cannot rapidly exchange substrates for different materials or geometries
Solution Approach 1:
The assembly is divided into separate functional components: a reusable housing structure and interchangeable substrate units. Each substrate can be independently removed and replaced, allowing rapid exchange of different substrate materials and geometries without affecting the overall assembly integrity.
Solution Approach 2:
The housing assembly is designed with universal features that can accommodate multiple types of substrates (planar, cylindrical, spherical, wire, foil) through standardized mounting interfaces. The same housing can hold different substrate geometries by simply changing the substrate unit while keeping the housing and sealing mechanism unchanged.
2Productivity
If cylindrical or spherical electrochemical substrate surfaces are used, then various geometries can be studied, but rapid experimentation and post-processing procedures such as SEM are hindered
Solution Approach 1:
The substrate is extracted from a complex fixed assembly and placed in a simple, easily removable holder within the housing. This allows the substrate to be quickly removed from the electrochemical cell and transferred to post-processing equipment like SEM without requiring disassembly of the entire cell structure.
Solution Approach 2:
The substrate holder incorporates dynamic elements such as springs or flexible seals that automatically adjust when the substrate is inserted or removed, enabling rapid substrate exchange without precise alignment procedures. The holder can be quickly inserted into or removed from the housing to facilitate fast substrate changes.
3Temperature
If low-temperature plastic seals are used in substrate exchange assemblies, then substrate replacement is possible, but the assembly cannot withstand elevated-temperature environments
Solution Approach 1:
The sealing system uses composite construction combining PTFE (polytetrafluoroethylene) with metal reinforcement elements. PTFE provides chemical resistance and sealing properties, while the metal reinforcement maintains structural integrity at elevated temperatures up to 600°C, enabling both high-temperature operation and substrate interchangeability.
Solution Approach 2:
The seal material properties are changed by selecting PTFE, which has a much higher service temperature range compared to conventional plastics. This material parameter change enables the assembly to operate in elevated-temperature environments while maintaining the ability to exchange substrates through the same sealing mechanism.
4Adaptability or versatility
If simple two-electrode configuration cells are used, then the assembly is simple, but the number of electrochemical measurements that can be performed is limited
Solution Approach 1:
The electrode configuration is made dynamic and reconfigurable. The housing contains multiple electrode terminals and connection points that can be configured in different arrangements (two-electrode, three-electrode, four-electrode) depending on the experimental requirements. This dynamic reconfigurability allows the same physical assembly to support multiple measurement techniques without requiring separate cells for each configuration.
Data Source
AI summary
An electrochemical substrate holder assembly, including: a first housing and a second housing; wherein the first housing and the second housing collectively define an interior space; a first gasket coupled to the first housing and adapted to contact a first side of a substrate; and a second gasket coupled to the second housing and adapted to contact a second side of the substrate; wherein the first gasket and the second gasket are collectively adapted to hold the substrate within the interior space. The first housing defines a first port adapted to receive a first electrical lead to electrically contact the first side of the substrate. The second housing defines a second port adapted to allow a fluid to pass there through to fluidly contact at least the second side of the substrate. The second housing is adapted to receive one or more of a second and third electrical lead.