Solid-State Battery Electrode Segmentation for Ionic Conductivity
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Solution Overview
Problem
Solid-state batteries with a stacked structure have lower ionic conductivity, affecting battery capacity due to limited ion transmission channels.
Innovation Solution
The battery design includes a first and second electrode layer with an electrolyte in between, featuring electrodes with opposite polarities and additional electrodes on ends, increasing ion transmission channels and surface area, and using an all-solid-state electrolyte to enhance ionic conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional stacked structure is used in solid-state batteries, then the structure is simple to manufacture, but the ionic conductivity is low which affects battery capacity
Solution Approach 1:
The battery is divided into multiple electrode layers (first electrode layer with first and second electrodes, second electrode layer with third and fourth electrodes) separated by electrolytes. This segmentation creates multiple ion transmission channels within the battery structure, increasing overall ionic conductivity while maintaining a manageable stacked configuration
Solution Approach 2:
The patent introduces additional electrodes (third and fourth electrodes) at the ends of the battery structure, extending the ion transmission pathways in the longitudinal dimension. This multi-dimensional electrode arrangement increases the total ion exchange surface area and improves ionic conductivity without simply increasing battery volume
2Reliability
If multiple electrodes are added to increase ion transmission channels, then ionic conductivity improves, but device complexity increases
Solution Approach 1:
The first and fourth electrodes share the same polarity (both anodes or both cathodes), as do the second and third electrodes. This merging of polarity groups allows for simplified current collection and electrode arrangement, reducing the complexity increase that would normally result from adding multiple electrodes
Solution Approach 2:
The electrolyte layers serve multiple functions: they separate adjacent electrodes with opposite polarities, provide ion conduction pathways, and enable multiple independent ion transmission channels simultaneously. This multi-functionality allows the same structural element to contribute to multiple performance improvements
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
This configuration increases battery capacity by improving ionic conductivity and ion exchange surface area, resulting in higher capacity compared to conventional battery structures.
Implementation Method 1
a solid-state battery often adopts a stacked structure... has a lower ionic conductivity... This configuration increases battery capacity by improving ionic conductivity
Data Source
AI summary
The present disclosure relates to a battery, including a first electrode layer, a second electrode layer, and an electrolyte disposed between the first and second electrode layers. The first electrode layer at least comprises a first electrode and a second electrode, which are spaced apart from each other. An electrolyte is disposed between the first electrode and the second electrode. A polarity of the first electrode is opposite of a polarity of the second electrode. The second electrode layer includes a third electrode disposed on an end opposite to the first electrode and a fourth electrode disposed on an end opposite to the second electrode. An electrolyte is disposed between the third electrode and the fourth electrode. A polarity of the third electrode is the same as that of the second electrode, and a polarity of the fourth electrode is the same as that of the first electrode.