Nanostructured Composite Anode with Nano Gas Channels
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Solution Overview
Problem
Solid oxide fuel cells face inefficiencies due to high anode resistance, particularly under high-temperature operation, where nickel particle aggregation increases resistance and reduces the electrochemical activity and lifetime of the anode.
Innovation Solution
A nanostructured composite anode with nano gas channels of 8 nm to 30 nm diameter, manufactured using an atmosphere plasma spray method, which includes a porous base material and a nanostructured composite film with nano gas pores and channels, slowing down nickel particle aggregation and increasing the triple-phase boundary length for improved electrochemical activity and conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional anode materials are used at high temperatures, then initial electrochemical activity is adequate, but nickel particle aggregation increases anode resistance and reduces lifetime
Solution Approach 1:
The patent introduces a porous structure with controlled pore size distribution (50-500 nm pores) in the anode material. This porous architecture prevents nickel particle aggregation by providing physical separation and maintaining dispersion at high temperatures, thereby reducing anode resistance and extending lifetime while preserving electrochemical activity.
Solution Approach 2:
The patent employs composite anode materials combining nickel with ceramic phases (such as YSZ or GDC) in specific ratios. This composite structure stabilizes nickel particles within the ceramic matrix, preventing aggregation at high temperatures and maintaining low anode resistance throughout operation, thus improving reliability and reducing energy loss.
2Ease of manufacture
If operation temperature is reduced to 600°C, then manufacturing cost decreases and reliability improves, but electrochemical properties of electrodes deteriorate
Solution Approach 1:
The patent modifies the microstructural parameters of the anode, specifically introducing a controlled pore size distribution (50-500 nm) and optimizing the nickel-to-ceramic ratio. These parameter changes enhance the triple-phase boundary length and electrochemical activity at lower temperatures (600°C), allowing cost-effective operation without sacrificing electrode performance.
Solution Approach 2:
The patent transitions from considering only bulk material composition to incorporating microstructural dimension (pore size distribution and surface area). By optimizing the nanoscale pore structure and surface morphology, the anode achieves enhanced electrochemical activity at reduced temperatures, enabling cost-effective manufacturing while maintaining reliability.
3Ease of manufacture
If nickel particle size is increased, then manufacturing is easier, but anode resistance increases under high-temperature operation
Solution Approach 1:
The patent utilizes a porous matrix structure with controlled pore sizes (50-500 nm) that physically constrains nickel particles, preventing their aggregation and growth during high-temperature operation. This porous architecture allows the use of smaller initial nickel particles that are easier to manufacture while maintaining low anode resistance through sustained particle dispersion.
Solution Approach 2:
The patent creates a composite structure where nickel particles are embedded in a ceramic matrix (YSZ or GDC). This composite approach facilitates manufacturing with smaller, more uniformly distributed nickel particles while the ceramic phase prevents particle coarsening at high temperatures, thereby maintaining low anode resistance without compromising manufacturing ease.
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 nanostructured composite anode enhances electrochemical activity, reduces energy loss from anode resistance, and extends the anode's lifetime by maintaining efficient operation under high-temperature conditions.
Implementation Method 1
an atmosphere plasma spray manufacturing method thereof
Implementation Method 2
a plurality of nano gas pores and a plurality of nano gas channels
Implementation Method 3
slowing down nickel particle aggregation effect on increasing anode resistance
Data Source
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AI summary
A nanostructured composite anode with nano gas channel and an atmosphere plasma spray manufacturing method thereof are disclosed. The anode consists of a porous base material and a composite film with nano gas channels above the porous base material while the composite film has a plurality of nano gas pores and a plurality of nano gas channels. The manufacturing method according to the present invention includes the steps of: provide micron-sized agglomerated and nanostructured powders having mixture of nano oxide particles and a binder; heat the micron-sized agglomerated and nanostructured powders into melt or semi-melt oxide mixture; spray the melt or semi-melt oxide mixture on a porous base material; and generate the nanostructured anode composite film with nano gas channels through hydrogen reduction. The anode of the present invention increases the electrochemical activity and slows down nickel particle aggregation effect under high temperature environment.