Carbon Nanoparticle Thermoelectric Layers for Efficiency
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Solution Overview
Problem
Current thermoelectric materials have low efficiency in converting heat energy into electrical energy, with significant waste heat loss, and are costly and time-consuming to fabricate, limiting their incorporation into various devices for heat collection and electrical generation.
Innovation Solution
A thermoelectric apparatus comprising p-type and n-type layers with carbon nanoparticles and insulating layers, arranged in a stacked configuration, to enhance thermoelectric efficiency, potentially combined with a photo-thermal apparatus that includes a Stokes shift layer for improved energy conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional thermoelectric materials (e.g., bismuth chalcogenides) are used to achieve high ZT values, then thermoelectric efficiency is improved, but fabrication cost and time increase significantly
Solution Approach 1:
The patent changes the material parameters by using carbon nanoparticles with controlled doping levels (p-type and n-type) instead of traditional bismuth chalcogenide compositions. This parameter substitution maintains high ZT values while enabling simpler, more cost-effective fabrication processes through solution-based methods and standard doping techniques.
Solution Approach 2:
The patent employs composite structures by combining carbon nanoparticles with polymer matrices (e.g., PVDF, PVF) to create thermoelectric materials. This composite approach allows independent optimization of electrical and thermal properties through the nanoparticle-polymer interface, achieving high efficiency without the complex fabrication required for pure bismuth chalcogenide superlattices.
2Loss of energy
If complex nanostructured superlattice materials are fabricated to achieve acceptable electrical conductivity and poor thermal conductivity, then thermoelectric performance is improved, but fabrication complexity and cost increase
Solution Approach 1:
Instead of controlling microstructure through complex superlattice fabrication, the patent changes the fundamental material parameters by using carbon nanoparticles with inherent size effects and surface properties that provide the desired electrical conductivity and thermal insulation, eliminating the need for precise layer-by-layer superlattice construction.
Solution Approach 2:
The patent substitutes expensive, difficult-to-fabricate bismuth chalcogenide superlattices with carbon-based composite materials that can be produced through simpler, more scalable methods. The carbon nanoparticle-polymer composites offer a cost-effective alternative that maintains thermoelectric performance without requiring sophisticated fabrication infrastructure.
3Reliability
If thermoelectric materials with specific tolerances are used, then device performance is maintained, but adaptability to various device configurations is limited
Solution Approach 1:
The patent uses polymer matrix composites that inherently provide flexibility and adaptability. The polymer binder (PVDF, PVF) allows the thermoelectric material to be conformally deposited on various substrates and device configurations, enabling integration into diverse applications while maintaining consistent performance through controlled nanoparticle doping and distribution.
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 solution increases the Seebeck coefficient and Figure of Merit (ZT) of thermoelectric materials, improving energy conversion efficiency and reducing fabrication costs, enabling broader device integration.
Implementation Method 1
Thermoelectric materials are operable to capture heat for additional electrical production. Thermoelectric efficiency is quantified by the Figure of Merit, ZT.
Implementation Method 2
at least one p-type layer comprises a plurality of carbon nanoparticles and the n-type layer comprises a plurality of n-doped carbon nanoparticles
Data Source
AI summary
In some embodiments, thermoelectric apparatus and various applications of thermoelectric apparatus are described herein. In some embodiments, a thermoelectric apparatus described herein comprises at least one p-type layer coupled to at least one n-type layer to provide a pn junction, and an insulating layer at least partially disposed between the p-type layer and the n-type layer, the p-type layer comprising a plurality of carbon nanoparticles and the n-type layer comprising a plurality of n-doped carbon nanoparticles.