Fuel Cell Carbon Support Structure for Low-Current Power Output
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Solution Overview
Problem
Existing carbon supports for fuel cells often have insufficient power generation performance due to undefined carbon wall content and throat diameter, leading to inadequate three-dimensional pore structure, which affects the efficiency of fuel cells, especially at low current densities.
Innovation Solution
A carbon support with a controlled carbon wall thickness between 3.3 nm and 11.2 nm, a carbon wall content between 60.3 ml/g and 190.8 ml/g, and a carbon support ratio between 36% and 67% is developed, using a silica mold with a three-dimensional pore structure, allowing for uniform metal catalyst support and enhanced power generation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional carbon supports are used without defined carbon wall content and throat diameter, then manufacturing is simpler and cost is lower, but power generation performance is insufficient
Solution Approach 1:
The patent applies parameter changes by establishing specific numerical ranges for carbon wall content (60.3-190.8 ml/g), throat diameter (1.9-2.5 nm), and carbon wall thickness (3.3-11.2 nm). These defined parameters transform the carbon support from an undefined conventional material into a precisely controlled structure that achieves both high power generation performance and manufacturability through quantitative specification.
2Stability of the object's composition
If carbon wall thickness is not controlled, then manufacturing is easier, but three-dimensional pore structure is inadequate
Solution Approach 1:
The patent controls carbon wall thickness within the specific range of 3.3-11.2 nm to achieve an adequate three-dimensional pore structure. This parameter control ensures that the pore structure provides sufficient surface area and volume for catalyst support while maintaining structural stability, resolving the contradiction between structural adequacy and manufacturing precision.
3Reliability
If carbon wall content is outside the specified range, then production is simpler, but catalyst support efficiency is reduced
Solution Approach 1:
The patent specifies carbon wall content within the range of 60.3-190.8 ml/g to optimize catalyst support efficiency. This parameter definition ensures adequate catalyst dispersion and activity while maintaining production feasibility, resolving the contradiction between reliability and manufacturing precision by establishing achievable quantitative targets.
4Reliability
If throat diameter is not controlled, then manufacturing is easier, but power generation efficiency at low current density is insufficient
Solution Approach 1:
The patent controls throat diameter within the specific range of 1.9-2.5 nm to enhance power generation efficiency, particularly at low current densities. This precise diameter control optimizes mass transport and catalyst accessibility, achieving high performance while maintaining manufacturability through well-defined production parameters.
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 carbon support increases fuel cell power generation performance, particularly at low current densities, by providing a suitable three-dimensional pore structure for efficient catalyst support, leading to improved efficiency point performance.
Implementation Method 1
a carbon support including at least one pore, wherein a thickness of a carbon wall of the carbon support, which is derived from a three-dimensional pore structure of a silica mold obtained by pore volume measurement of the silica mold by nitrogen adsorption analysis
Implementation Method 2
obtained by pore volume measurement of the silica mold by nitrogen adsorption analysis
Data Source
AI summary
To provide a carbon support for catalysts for fuel cells, which increases the power generation performance of fuel cells, a catalyst for fuel cells, a catalyst layer for fuel cells, and a method for producing the carbon support. A carbon support for catalysts for fuel cells, wherein the carbon support includes at least one pore; wherein a thickness of a carbon wall of the carbon support, which is derived from a three-dimensional pore structure of a silica mold obtained by pore volume measurement of the silica mold by nitrogen adsorption analysis, is 3.3 nm or more and 11.2 nm or less; and wherein a carbon wall content is more than 60.3 ml/g and less than 190.8 ml/g.