Conductive Polymer Mesh Electrode for Fuel Cell Corrosion

Solution Overview

Problem

Fuel cells face challenges in commercialization due to corrosion of carbon-based carriers, requiring alternative carriers that are electrochemically stable, have high electrical conductivity, and a wide surface area for catalytic activity.

Innovation Solution

A fuel cell with a conductive polymer electrode having a mesh structure, incorporating polyethylene oxide (PEO) and specific conductive polymers like polyaniline or PEDOT:PSS, which are processed to enhance stability and electrical conductivity, and etched to create vertically aligned pores for improved material movement and water discharge.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If carbon-based carriers are used in fuel cells, then electrical conductivity and catalytic surface area are improved, but corrosion resistance deteriorates

Engineering Contradiction:

Improvecorrosion resistanceVSAvoidelectrical conductivity

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent employs composite materials by combining conductive polymers (such as polyaniline, polythiophene, or PEDOT) with metal nanoparticles (such as Pt, Pd, or Au) to create a hybrid electrode material. This composite structure provides both the corrosion resistance of polymers and the high electrical conductivity and catalytic activity of metals, directly resolving the contradiction between durability and energy efficiency.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent utilizes porous conductive polymer structures with controlled pore sizes and high surface area to volume ratios. The porous architecture increases the catalytic surface area while maintaining electrical conductivity through the conductive polymer network, and the polymer matrix provides corrosion resistance, thus addressing all three requirements simultaneously.

Inventive Principle:

Principle #31Porous materials

2Reliability

If conductive polymer electrodes are used, then corrosion resistance is improved, but electrical conductivity deteriorates

Engineering Contradiction:

Improvecorrosion resistanceVSAvoidelectrical conductivity

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent employs composite materials by combining conductive polymers (such as polyaniline, polythiophene, or PEDOT) with metal nanoparticles (such as Pt, Pd, or Au) to create a hybrid electrode material. This composite structure provides both the corrosion resistance of polymers and the high electrical conductivity and catalytic activity of metals, directly resolving the contradiction between durability and energy efficiency.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent optimizes parameters of the conductive polymer including molecular weight, doping level, and crystallinity to enhance electrical conductivity. By controlling these parameters, the polymer maintains its corrosion resistance while achieving sufficient electrical conductivity for fuel cell operation.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If mesh structure with vertically aligned pores is created, then material movement and water discharge are improved, but manufacturing complexity increases

Engineering Contradiction:

Improvematerial movement efficiencyVSAvoidmanufacturing process complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the electrode structure into vertically aligned pore channels within a mesh architecture. This segmentation creates defined pathways for reactant transport and product removal, improving material movement efficiency while the modular nature of the segmented structure facilitates manufacturing through standardized processes.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent utilizes porous conductive polymer structures with controlled pore sizes and high surface area to volume ratios. The porous architecture increases the catalytic surface area while maintaining electrical conductivity through the conductive polymer network, and the polymer matrix provides corrosion resistance, thus addressing all three requirements simultaneously.

Inventive Principle:

Principle #31Porous 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 conductive polymer electrode improves fuel cell performance by increasing surface area, reducing corrosion, and enhancing electrical conductivity, leading to improved durability and efficiency in energy generation.

Implementation Method 1

A fuel cell is a device that directly converts the chemical energy of fuel (hydrogen, methanol, coal, natural gas, petroleum, etc.) into electrical energy by an electrochemical reaction in a fuel cell stack

Methodology Applied

Scientific EffectElectrochemical reaction: Fuel Cell

Implementation Method 2

the conductive polymer electrode may have a period of about 50 nm to about 2 μm, a channel diameter of about 20 nm to about 500 nm, a depth of about 0.2 μm to about 1.6 μm, and an aspect ratio of about 0.5 to about 3

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Data Source

PatentUS10476095B2Fuel cell and method of manufacturing the same

Publication Date: 2019.11.12 HYUNDAI MOTOR CO LTD

AI summary

A fuel cell may include a fuel supply unit for supplying hydrogen to a fuel cell stack; an air supply unit for supplying air to the fuel cell stack; and the fuel cell stack that generates energy using hydrogen and air supplied from the fuel supply unit and the air supply unit, wherein the fuel cell stack has a mesh structure and comprises a conductive polymer electrode containing about 0.1 to 1 wt % of polyethylene oxide (PEO) having a molecular weight of about 1,000 to 6,000 kg/mol.