Roll-to-Roll AEM Coating for COx Electrolyzer Membrane Integrity

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current membrane electrode assemblies (MEAs) for carbon oxide reduction reactors face challenges such as parasitic reactions, reactant loss, delamination, and efficiency issues due to the inability to maintain a suitable environment for COx reduction, which are not effectively addressed by existing technologies used in water electrolyzers and fuel cells.

Innovation Solution

The development of a roll-to-roll deposition method and ink formulation for producing anion-exchange membranes using poly(m-terphenyl) ionic polymers, solvent mixtures, and optional additives, which includes a binder polymer and inert particles, to form MEAs with specific properties that minimize parasitic reactions and maintain the integrity of the membrane during COx reduction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional MEA manufacturing processes are used, then production scalability is limited, but manufacturing precision and membrane integrity deteriorate

Engineering Contradiction:

Improveproduction scalabilityVSAvoidmembrane integrity

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent replaces conventional mechanical assembly methods with a solution-based coating process. The anion-exchange membrane is formed by depositing a polymer solution onto the substrate and then drying it, eliminating mechanical handling steps that cause delamination and integrity issues while enabling continuous roll-to-roll production

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent controls the membrane formation process by adjusting solution parameters (polymer concentration, solvent composition, coating thickness) and drying parameters (temperature, time). This allows precise control of membrane properties while maintaining continuous production capability

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If existing technologies from water electrolyzers are applied, then device complexity is reduced, but COx reduction efficiency deteriorates due to inability to maintain suitable environment

Engineering Contradiction:

Improvetechnology simplicityVSAvoidCOx reduction efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent incorporates functional additives (basic compounds, buffering agents, chelating agents) into the membrane solution to create localized chemical environments within the membrane that are optimized for COx reduction. This allows the membrane to provide tailored local conditions (pH control, metal ion complexation) without changing the overall device structure

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent uses the membrane as an intermediary that mediates the chemical environment between reactants and catalysts. The membrane's composition (basic compounds, buffering agents) actively manages the local chemistry to prevent parasitic reactions and maintain optimal conditions for COx reduction

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If standard ink formulations are used, then formulation complexity is minimized, but coating quality and membrane uniformity deteriorate

Engineering Contradiction:

Improveformulation complexityVSAvoidcoating uniformity

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent develops a composite ink formulation containing poly(m-terphenyl) polymer, multiple solvents (cyclopentanone, n-propyl alcohol), and functional additives (basic compounds, buffering agents, chelating agents, inert particles). This composite formulation achieves superior coating quality, uniformity, and membrane performance while enabling precise control of membrane properties

Inventive Principle:

Principle #40Composite materials

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 solution enables high-yield COx reduction products by reducing parasitic reactions, preventing reactant and product cross-over, maintaining membrane integrity, and optimizing the environment for efficient COx reduction, thereby extending the MEA's lifespan and improving overall reactor efficiency.

Implementation Method 1

delivering the ink formulation to the roll-to-roll coater, coating the ink formulation to the substrate to form the anion-exchange membrane

Methodology Applied

Scientific EffectRoll-to-roll deposition:

Implementation Method 2

one or more drying ovens... the drying oven temperature

Methodology Applied

Scientific EffectEvaporation: Evaporation

Data Source

PatentUS20240425998A1AEM roll-to-roll ink formulations and processes for co2 electrolyzers

Publication Date: 2024.12.26 TWELVE BENEFIT CORP

AI summary

Provided herein are systems and methods for roll-to-roll deposition of membrane electrode assemblies (MEAs) and layers thereof. Embodiments of the systems and methods may be used for producing layers, including polymer electrolyte membranes (PEMs) and catalyst layers, of an MEA. In particular embodiments, the methods and systems may be used for producing anion-exchange membranes (AEMS). In other instances, the methods and systems may be used for producing cation-exchange membranes or bipolar membranes. Also provided are MEAs and layers thereof produced by the methods described herein. In some embodiments, the MEAs are configured for electrolysis and, in particular, for carbon oxide (COx) reduction. The methods and systems may also be employed for water electrolysis.