PEM Electrolysis Catalyst Laminate With Fibers to Suppress Cracks

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Cracks occur in the electrode catalyst layer of PEM water electrolysis devices, leading to decreased performance and durability.

Innovation Solution

Incorporating a fibrous material into the electrode catalyst layer, alongside a catalyst and polymer electrolyte, to disperse stress and improve adhesion, thereby suppressing crack formation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a coating method is used to form an electrode catalyst layer on a solid polymer electrolyte membrane, then the electrode catalyst layer can be formed, but cracks occur in the electrode catalyst layer due to excessive stress during drying

Engineering Contradiction:

Improvecrack suppression in electrode catalyst layerVSAvoiddurability of electrode catalyst layer

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The electrode catalyst layer is formed as a composite material containing catalyst particles, polymer electrolyte, and fibrous material. This composite structure allows the fibrous material to act as a stress-absorbing network that prevents crack formation while maintaining the functional properties of the catalyst and polymer electrolyte components.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention changes the physical and chemical parameters of the electrode catalyst layer by incorporating fibrous material with specific characteristics (fiber diameter, length, and content ratio). This modification alters the stress distribution characteristics and mechanical properties of the layer, enabling crack suppression during the drying process.

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If the solid polymer electrolyte membrane swells due to moisture infiltration during coating, then the electrode catalyst layer forming composition can infiltrate, but excessive stress is applied during drying causing cracks

Engineering Contradiction:

Improvecoating process feasibilityVSAvoidcrack occurrence in electrode catalyst layer

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The fibrous material is incorporated into the electrode catalyst layer beforehand to create a cushioning effect. This pre-established fibrous network absorbs and distributes the stress that arises during drying, preventing crack formation while allowing the coating process to proceed with moisture infiltration.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Quantity of substance

If the electrode catalyst layer shrinks during drying, then moisture is discharged, but excessive stress causes cracks in the layer

Engineering Contradiction:

Improvemoisture dischargeVSAvoidstructural integrity of electrode catalyst layer

Core Design Contradiction:

Quantity of substanceVSStrength

Solution Approach 1:

The invention modifies the structural parameters of the electrode catalyst layer by adding fibrous material, which changes the shrinkage behavior during drying. The fibrous network provides a flexible framework that accommodates volume reduction while maintaining structural integrity and preventing crack formation.

Inventive Principle:

Principle #35Parameter changes

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 laminate design effectively reduces crack occurrence, maintains potential distribution, and enhances the durability and performance of the water electrolysis device.

Implementation Method 1

the stress is dispersed due to the fibrous material, which is included in the electrode catalyst layer in addition to the catalyst and the polymer electrolyte and is appropriately entangled

Methodology Applied

Scientific EffectStress dispersion:

Implementation Method 2

the solid polymer electrolyte membrane swells due to infiltration of the moisture in the electrode catalyst layer forming composition

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Implementation Method 3

during drying of the solid polymer electrolyte membrane, excessive stress is applied to the electrode catalyst layer due to discharge of the moisture

Methodology Applied

Scientific EffectEvaporation: Evaporation

Data Source

PatentUS20250361629A1Laminate for water electrolysis device, membrane electrode assembly for water electrolysis device, and water electrolysis device

Publication Date: 2025.11.27 TOPPAN HOLDINGS INC

AI summary

A laminate for a water electrolysis device includes a polymer electrolyte membrane and an electrode catalyst layer provided on one surface of the polymer electrolyte membrane. The electrode catalyst layer includes a catalyst, a polymer electrolyte, and a fibrous material. A membrane electrode assembly for a water electrolysis device includes the laminate for a water electrolysis device and a second electrode catalyst layer, and includes an electrode catalyst layer, a polymer electrolyte membrane, and a second electrode catalyst layer in this order.