Solid-Electrolyte Three-Electrode Cell for ASSB Diagnostics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
It is difficult to diagnose issues in All Solid State Batteries (ASSB) by distinguishing the performance of the anode and cathode due to their combined performance in regular full cell studies, making it challenging to use electrochemical data for diagnostics.
Innovation Solution
A three electrode cell design is introduced, featuring a solid electrolyte with an embedded elongated reference electrode that extends outside the housing, allowing for separate electrochemical testing of the anode and cathode through a continuous electron flow, facilitated by plungers and adapters that secure the electrodes and the reference electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a regular full cell study is used, then the cell structure is simple, but it is difficult to diagnose issues by distinguishing anode and cathode performance
Solution Approach 1:
The battery cell is segmented into three separate electrodes (anode, cathode, and reference electrode) instead of the conventional two-electrode full cell. This segmentation allows independent measurement of anode and cathode performance by using the reference electrode as a stable potential benchmark, enabling precise diagnostic measurement while maintaining a manageable cell structure.
Solution Approach 2:
A reference electrode is introduced as an intermediary element with stable and known potential. This reference electrode serves as a mediator that enables the measurement of individual electrode potentials by providing a stable reference point, allowing accurate electrochemical diagnostics without significantly complicating the overall cell structure.
2Measurement precision
If a reference electrode is embedded in the solid electrolyte, then electrochemical testing precision is improved, but the housing and assembly complexity increases
Solution Approach 1:
The reference electrode is pre-embedded within the solid electrolyte layer during the stacking process, before final assembly. This preliminary action ensures proper positioning and electrical contact of the reference electrode with the solid electrolyte, enabling precise electrochemical measurements while simplifying the overall assembly process by integrating the reference electrode into the stacking sequence rather than requiring separate installation steps.
Solution Approach 2:
The reference electrode is nested within the solid electrolyte layer, which itself is nested between the anode and cathode laminates. This nested arrangement allows the reference electrode to be properly positioned and surrounded by the solid electrolyte for optimal electrochemical contact, achieving high measurement precision while maintaining a compact and integrated cell structure.
3Reliability
If plungers and adapters are added to secure electrodes, then electrode contact reliability is improved, but device complexity increases
Solution Approach 1:
The plunger and adapter components are designed and integrated to work together as a unified assembly mechanism. The plunger applies compression force while the adapter provides structural support and alignment, merging their functions into a coordinated system that secures all electrodes (anode, cathode, and reference electrode) reliably. This combined approach improves contact reliability while avoiding the need for multiple separate fastening mechanisms.
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
Enables accurate and precise electrochemical testing of anode and cathode performance by monitoring potential differences, enhancing diagnostic capabilities and improving battery performance assessment.
Implementation Method 1
a solid electrolyte between the anode and the cathode
Implementation Method 2
to test electrochemical data of the anode and cathode
Data Source
AI summary
A three electrode cell includes an anode, a cathode, a solid electrolyte between the anode and the cathode, an elongated reference electrode embedded in the solid electrolyte, and a housing surrounding the anode, the cathode and the solid electrolyte. The reference electrode extends out of the housing.