Battery Sealer Composition for Hydrogen Sulfide Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
All-solid-state secondary batteries with sulfur-containing solid electrolytes face challenges in suppressing hydrogen sulfide generation due to sulfur leakage, as existing sealers require high trapping material ratios, compromising electric insulation and formability.
Innovation Solution
A sealer containing a resin and particulate fatty acid metal salts, where the fatty acid is coordinated on metal particles with a mean diameter of not more than 1000 nm, dispersed in the resin, effectively traps sulfur and maintains electric insulation, with the fatty acid metal salt present in amounts from 0.0005 to 5% by mass, and the resin selected from polyimide, polyamide-imide, PEEK, or LCP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high ratio of trapping material (10-20%) is added to the sealer to suppress hydrogen sulfide generation, then sulfur trapping efficiency improves, but electric insulation and formability deteriorate
Solution Approach 1:
The invention changes the particle size parameter of the trapping material to nanometer scale (1-100 nm), which dramatically increases the surface area to volume ratio. This allows the trapping material to be effective at much lower concentrations (0.01-5 mass%), thereby maintaining electric insulation and formability while still achieving efficient sulfur trapping. The particle size parameter change resolves the contradiction by enabling high efficiency at low dosage.
Solution Approach 2:
The invention creates a composite sealer material combining polymer base material with nanometer-scale trapping material particles. This composite structure allows the trapping material to be uniformly dispersed throughout the polymer matrix, maximizing trapping efficiency while minimizing the amount needed. The composite nature enables both sulfur trapping function and maintenance of polymer's electric insulation and formability properties.
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 sealer efficiently suppresses hydrogen sulfide generation while maintaining electric insulation and formability, allowing for effective sulfur trapping and reduced hydrogen sulfide production, even at low fatty acid metal salt concentrations, and supports the battery's expansion and contraction during charging and discharging.
Implementation Method 1
a fatty acid is coordinated on the surfaces of the metal particles
Implementation Method 2
the sealer is capable of efficiently trapping sulfur released from an all-solid-state secondary battery
Data Source
AI summary
A sealer for use in an all-solid-state secondary battery provided with a sulfur-containing solid electrolyte, characterized in that the sealer contains a resin and a particulate fatty acid metal salt dispersed in the resin, and the particulate fatty acid metal salt is a particulate fatty acid metal salt in which a fatty acid is coordinated on the surfaces of the metal particles having a mean particle diameter of not more than 1000 nm. The all-solid-state secondary battery is capable of suppressing the generation of the hydrogen sulfide.