Biochar-Based Ultra-Capacitor Electrodes from Biomass
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Solution Overview
Problem
Current ultra-capacitor electrodes and battery electrode support materials made from graphite, graphene, and graphene-oxide face limitations due to availability, toxicity, and monotonic nature, and existing storage solutions for electric energy are costly and inefficient, with disposal considerations being a major concern.
Innovation Solution
A system and method for producing biochar-based ultra-capacitor electrodes and battery components using a biomass feedstock that involves selective plant species, controlled growth conditions, processing steps like charring, and thermal and chemical treatments to create tailored biochar with desired properties, avoiding the need for mining and toxic compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If graphite, graphene, or graphene-oxide are used as ultra-capacitor electrodes and battery electrode support materials, then the structural integrity and electrical performance are maintained, but the availability is limited, toxicity issues arise, and the materials are monotonic in nature
Solution Approach 1:
The patent applies parameter changes by transforming the chemical composition and physical structure of biomass through controlled pyrolysis conditions (temperature, atmosphere, heating rate) to produce biochar with tailored properties. This resolves the contradiction by creating electrode materials with desired electrical performance and structural integrity while using non-toxic, renewable biomass feedstocks instead of limited graphite or graphene sources
Solution Approach 2:
The patent creates composite materials by combining biochar derived from biomass with conductive additives, binders, and surface treatments to achieve the electrical performance previously only attainable with graphite or graphene. This composite approach eliminates toxicity concerns while maintaining reliability through synergistic material combinations
2Device complexity
If standard capacitors and electrolytic capacitors are used for electric energy storage, then the device complexity is low, but the energy density and power density are insufficient for large-scale storage
Solution Approach 1:
The patent applies universality by designing a dual-electrode ultra-capacitor system where both electrodes use biochar-based materials, allowing the same material platform to serve multiple functions (energy storage, structural support, conductivity) while achieving high energy and power density suitable for large-scale storage applications
3Reliability
If graphite, graphene, or graphene-oxide materials are used for ultra-capacitor electrodes, then the electrical conductivity is maintained, but the materials are limited to hexagonal planar carbon structures
Solution Approach 1:
The patent applies parameter changes by controlling pyrolysis conditions (temperature, residence time, atmosphere composition) to create biochar with varied pore structures, surface areas, and carbon arrangements that extend beyond hexagonal planar structures. This maintains electrical conductivity while achieving structural diversity for tailored electrode performance
Solution Approach 2:
The patent utilizes porous materials by creating biochar with controlled porosity through pyrolysis, generating hierarchical pore structures that provide both electrical conductivity pathways and increased surface area for ion transport, thereby achieving versatility beyond the limitations of dense hexagonal carbon structures
4Quantity of substance
If ultra-capacitors with dual-electrode design are used for large-scale electric energy storage, then the energy density and power density are improved, but the manufacturing complexity and material requirements increase
Solution Approach 1:
The patent applies universality by using the same biochar-based material platform for both positive and negative electrodes, simplifying the manufacturing process while maintaining the dual-electrode design's high energy and power density benefits. This eliminates the need for different materials for each electrode, reducing manufacturing complexity
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 biochar-based system provides a cost-effective, renewable, and 'green' solution for energy storage, offering improved performance and reduced environmental impact by utilizing biomass-derived materials with controlled properties for enhanced energy density and power density, while eliminating the need for toxic substances and mining.
Implementation Method 1
pyrolysis of the biomass under advantageous pyrolysis conditions/parameters
Implementation Method 2
processing such biochar according to advantageous processing conditions/parameters
Data Source
AI summary
An end-to-end system/process for producing advantageous end products from a raw biomass feedstock is provided. The process includes steps for enhancing biomaterial feedstock, biochar generation and end-product fabrication. The method steps may be employed in selecting, treating and handling biomass materials and their additive inputs to tailor their end performance. Each operative step in the process may be employed to enhance the overall effectiveness of biochar generation and use. Charring furnace design and operational parameters are provided that generate desirable biochar material for various applications, including specifically fabrication of ultra-capacitor electrodes and electric battery components.