Doped Metal Oxide Catalyst Support for Lower Fuel Cell Resistance
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Solution Overview
Problem
The internal resistance of fuel cell systems using existing support and metal catalysts is not sufficiently low, necessitating an improvement in electric conductivity.
Innovation Solution
A support and metal catalyst is developed, comprising a support powder made of metal oxide fine particles with a chained structure, doped with a dopant element, where the atomic ratio of titanium to the total of titanium and tin is between 0.30 and 0.80, enhancing electric conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing support and metal catalyst are used, then the fuel cell system can operate, but the internal resistance is not sufficiently low
Solution Approach 1:
The patent changes the chemical composition parameters of the metal oxide support by doping with specific ratios of titanium and tin (atomic ratio of Ti to Ti+Sn is 0.30 to 0.80), which fundamentally alters the electrical conductivity properties of the support material, thereby reducing internal resistance of the fuel cell system
Solution Approach 2:
The patent creates a composite material system by combining metal oxide support with specific dopant elements (titanium and tin in controlled ratios) and supporting metal catalyst particles, forming a multi-component composite structure that achieves superior electrical conductivity compared to single-material systems
2Reliability
If the atomic ratio of titanium to total titanium and tin is optimized, then electric conductivity becomes particularly high, but the manufacturing precision requirement increases
Solution Approach 1:
The patent establishes specific parameter ranges for the atomic ratio of titanium to total titanium and tin (0.30 to 0.80), providing clear manufacturing targets that balance achieving high electrical conductivity with practical manufacturability, avoiding overly stringent precision requirements while ensuring optimal performance
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 improved support and metal catalyst achieves high electric conductivity, effectively reducing internal resistance and enhancing the performance of fuel cell systems.
Implementation Method 1
the metal oxide is doped with a dopant element, and an atomic ratio of titanium with respect to total of titanium and tin is 0.30 to 0.80
Implementation Method 2
the support fine particles have a chained portion structured by a plurality of crystallites being fusion bonded to form a chain
Data Source
AI summary
A support and metal catalyst with improved electric conductivity is provided. A support and metal catalyst, including: a support powder; and metal fine particles supported on the support powder; wherein: the support powder is an aggregate of support fine particles; the support fine particles have a chained portion structured by a plurality of crystallites being fusion bonded to form a chain; the support fine particles are structured with metal oxide; and the metal oxide is doped with a dopant element, and an atomic ratio of titanium with respect to total of titanium and tin is 0.30 to 0.80, is provided.