Solid-State Battery Electrode PTC Layer for Lower Heat Generation
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Solution Overview
Problem
Solid-state batteries generate excessive heat, which is a concern for their efficiency and safety, particularly due to the lack of effective solutions to manage heat generation in these batteries.
Innovation Solution
An electrode configuration for solid-state batteries is introduced, featuring a PTC layer between the electrode layer and the current collector, composed of an electroconductive material, Ni, and a polymer, where the volume percent of Ni exceeds that of the electroconductive material, optimizing the PTC layer's composition and structure to control resistance and heat management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a PTC layer containing electroconductive material and polymer is used in solid-state batteries, then the resistance increase temperature is decreased, but the heat generation amount remains excessive
Solution Approach 1:
The patent changes the material composition parameters of the PTC layer by incorporating Ni particles with specific volume percentages (30-35 vol%) and specific surface areas (0.03-0.20 μm²), which modifies the thermal and electrical properties to reduce heat generation while maintaining appropriate resistance increase temperature
Solution Approach 2:
The patent creates a composite PTC layer material combining electroconductive material, polymer, and Ni particles in specific proportions, where the composite structure achieves both temperature control and heat generation reduction that neither component could achieve alone
2Object-generated harmful factors
If the volume percent of Ni in the PTC layer is increased, then the heat generation amount is decreased, but the electronic resistance increases
Solution Approach 1:
The patent optimizes Ni particle parameters including volume percentage (30-35 vol%), specific surface area (0.03-0.20 μm²), and average particle diameter (63-150 nm), which simultaneously reduces heat generation while maintaining acceptable electronic resistance through precise parameter control
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 effectively reduces heat generation in solid-state batteries by increasing electronic resistance with temperature, thereby enhancing the batteries' thermal management and performance.
Implementation Method 1
a PTC layer which is disposed between the electrode layer and the current collector... the PTC layer contains an electroconductive material, Ni and a polymer... increasing electronic resistance with temperature
Data Source
AI summary
An electrode is configured to decrease the heat generation amount of solid-state batteries. An electrode for solid-state batteries, wherein the electrode comprises an electrode layer, a current collector, and a PTC layer which is disposed between the electrode layer and the current collector and which is in contact with the electrode layer; wherein the PTC layer contains an electroconductive material, Ni and a polymer; and wherein a volume percent of the Ni in the PTC layer is larger than a volume percent of the electroconductive material in the PTC layer.