Nitrogen-Rich Carbon Materials from Pyrolyzed Egg Protein
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Nitrogen-rich carbon materials used in applications like supercapacitors and fuel cells are expensive to manufacture and have nitrogen atoms primarily at the surface, which wears out quickly, necessitating high nitrogen content in the feedstock and additional chemical treatments.
Innovation Solution
Pyrolyzing egg protein, specifically eggshell membrane and egg white, to create nitrogen-rich, mesoporous or microporous carbon materials with a continuous conducting core and a porous shell, which can be partially activated to retain nitrogen and oxygen, enhancing electrical conductivity and capacitive performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional chemical treatments (acid boiling or high temperature ammonia vapors) are used to make carbon material surfaces rich in nitrogen atoms, then nitrogen content at surface is improved, but manufacturing cost and process complexity increase
Solution Approach 1:
The invention uses feedstock that already contains high nitrogen content (such as eggshell membrane, fish scales, or other nitrogen-rich biological materials) before the pyrolysis process. By selecting feedstock with inherent high nitrogen content, the need for subsequent nitrogen-introduction treatments is eliminated, directly resolving the contradiction between achieving high nitrogen content and maintaining ease of manufacture
Solution Approach 2:
The nitrogen-rich functional groups are generated automatically during the pyrolysis process from the nitrogen-containing feedstock itself, without requiring external chemical treatments. The feedstock serves its own function of providing nitrogen atoms, eliminating the need for separate nitrogen-introduction steps and reducing manufacturing complexity
2Quantity of substance
If nitrogen atoms are only at the outermost surface layer through chemical treatments, then surface nitrogen functionality is improved, but durability decreases as functionality wears out with prolonged use
Solution Approach 1:
The invention creates a nitrogen-rich core structure within the carbon material where nitrogen atoms are distributed throughout the bulk, not just at the surface. This core nitrogen content provides long-term stability and prevents functionality loss during cycling, as the nitrogen atoms are embedded in the carbon matrix rather than being susceptible to wear at the surface
Solution Approach 2:
The resulting material is a composite carbon-nitrogen structure where nitrogen atoms are integrated into the carbon matrix during pyrolysis. This composite structure combines the conductivity of carbon with the functionality of nitrogen, creating a durable material where nitrogen functionality is maintained throughout the bulk and not just at the surface
3Stability of the object's composition
If high nitrogen content in feedstock is required to achieve bulk nitrogen distribution, then nitrogen distribution is improved, but feedstock availability and cost increase
Solution Approach 1:
The invention uses readily available nitrogen-rich waste materials (eggshell membrane, fish scales, poultry feathers) as feedstock. These materials naturally contain high nitrogen content and are abundant waste products, eliminating the need for expensive or rare feedstocks while achieving bulk nitrogen distribution in the final product
Solution Approach 2:
The invention employs inexpensive waste materials that would otherwise be discarded (eggshells, fish scales, feathers) as feedstock. These cheap, abundant materials provide the necessary nitrogen content without requiring investment in expensive or specialized feedstock sources, making bulk nitrogen distribution economically viable
4Quantity of substance
If additional chemical treatments are applied to achieve high nitrogen content, then nitrogen functionality is improved, but manufacturing complexity and environmental impact increase
Solution Approach 1:
The invention extracts and utilizes the nitrogen already present in the feedstock during pyrolysis, eliminating the need for separate nitrogen-introduction treatments. By taking advantage of the inherent nitrogen content in materials like eggshell membrane and fish scales, the process removes unnecessary chemical treatment steps and reduces manufacturing complexity
Solution Approach 2:
The feedstock serves dual purposes: providing both the carbon matrix and the nitrogen atoms needed for functionality. The nitrogen-rich feedstock self-generates the desired nitrogen functionality during pyrolysis without requiring external chemical treatments, simplifying the overall manufacturing process and reducing environmental impact
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 resulting carbon materials exhibit high specific capacitance, excellent electrical conductivity, and long cycle life, making them suitable for supercapacitors, battery electrodes, and CO2 capture, while reducing production costs by eliminating the need for intense chemical treatments.
Implementation Method 1
Pyrolyzing egg protein, specifically eggshell membrane and egg white, to create nitrogen-rich, mesoporous or microporous carbon materials
Implementation Method 2
The porous shell may comprise nitrogen or oxygen... enhancing electrical conductivity and capacitive performance
Implementation Method 3
They are also very useful as sorbents for CO2 capture
Data Source
AI summary
A carbon material comprising pyrolized egg protein characterized by containing mesopores or micropores. The pyrolized egg protein may comprise pyrolyzed eggshell membrane having a continuous conducting core and a porous shell, the pyrolyzed eggshell membrane comprising partially-activated carbon. The porous shell may comprise nitrogen or oxygen. The pyrolized egg protein may comprise mesoporous egg white.