Dome-Shaped Bipolar Plates for Radial-Flow Electrolyzers

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Solution Overview

Problem

Current electrolysis processes, such as alkaline and proton exchange membrane electrolyzers, suffer from low energy efficiency and high materials/operation costs due to inherent constraints in their architecture and materials, leading to inefficient hydrogen production compared to steam methane reforming.

Innovation Solution

The development of dome-shaped bipolar plates and electrolyzers with a stack configuration that includes dome-shaped components such as mesh, GDL, diaphragm or membrane, and current collectors, which facilitate radial flow and efficient separation of gases, thereby increasing the active reaction area and reducing energy losses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If conventional flat bipolar plates are used in electrolyzers, then the structural support and gas separation functions are achieved, but the active reaction area is limited and energy efficiency is low

Engineering Contradiction:

Improveenergy efficiencyVSAvoidactive reaction area

Core Design Contradiction:

Use of energy by moving objectVSArea of stationary object

Solution Approach 1:

The bipolar plate is designed with a dome-shaped curved surface instead of a flat surface. This curvature increases the active reaction area available for electrochemical reactions while maintaining structural integrity. The domed configuration allows for better gas channel flow distribution and enhanced mass transport, directly improving energy efficiency by maximizing the utilization of the electrode surface area.

Inventive Principle:

Principle #14Spheroidality (Curvature)

2Productivity

If bipolar plates with complex flow field channels are used, then gas and water transport is improved, but the manufacturing complexity and cost increase

Engineering Contradiction:

Improvegas and water transport efficiencyVSAvoidmanufacturing complexity

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The dome-shaped bipolar plate design inherently creates effective flow fields through its curved geometry. The radial flow channels are formed by the domed surface itself, eliminating the need for complex machined channels. This approach maintains excellent gas and water transport properties while significantly simplifying manufacturing processes, as the curved shape can be achieved through forming operations rather than complex machining.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The design merges the structural support function, gas separation function, and flow field function into a single integrated dome-shaped bipolar plate component. By combining these functions into one element with a simple curved geometry, the manufacturing complexity is reduced while maintaining effective gas and water transport through the radial flow pattern created by the domed surface.

Inventive Principle:

Principle #5Merging (Combining)

3Strength

If thicker bipolar plates are used, then the structural strength and stability are improved, but the weight and material cost increase

Engineering Contradiction:

Improvestructural strengthVSAvoidbipolar plate weight

Core Design Contradiction:

StrengthVSWeight of stationary object

Solution Approach 1:

The dome-shaped configuration provides superior structural strength-to-weight ratio compared to flat plates. The curved geometry naturally resists deformation and distributes mechanical loads more effectively, allowing for thinner plate designs that maintain adequate structural strength. This reduces both the weight and material cost while preserving the necessary structural stability for electrolyzer operation.

Inventive Principle:

Principle #14Spheroidality (Curvature)

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 significantly enhances the energy efficiency of the electrolysis process, making it more comparable in cost to hydrogen production by steam methane reforming, while also reducing material costs and improving the structural integrity and stability of the electrolyzer stack.

Implementation Method 1

facilitate radial flow and efficient separation of gases

Methodology Applied

Scientific EffectRadial flow:

Implementation Method 2

One type of electrolysis is hydrolysis, during which water is decomposed into oxygen and hydrogen

Methodology Applied

Scientific EffectHydrolysis: Hydrolysis

Implementation Method 3

Electrolysis is a technique that uses direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction

Methodology Applied

Scientific EffectElectrolysis: Electrolysis

Implementation Method 4

They separate gases such as hydrogen and oxygen, while removing water and unreacted gases and other materials. Hence, they are impermeable to gases.

Methodology Applied

Scientific EffectGas separation:

Data Source

PatentUS20250027216A1electrolyzer

Publication Date: 2025.01.23 DERFLER FREDERIC

AI summary

A dome-shaped bipolar plate.