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Diffusion and Current Generation in Porous Electrodes for Thermo-electrochemical Cells
1Department of Mechanical Engineering , INHA University , Incheon 22212 , South Korea.
ACS Applied Materials & Interfaces
|July 23, 2019
Summary
A new theory quantifies the diffusion effect in thermochemical cells (thermocells) using the Thiele modulus. This research optimizes porous electrode design for efficient waste heat energy harvesting.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Harvesting
Background:
- Carbon-based porous electrodes enhance thermochemical cells (thermocells) for waste heat recovery.
- Diffusion limitations in porous electrodes reduce ion concentration and output current.
Purpose of the Study:
- To develop a theoretical framework for quantifying the diffusion effect in porous electrodes.
- To provide a basis for designing improved porous electrodes for thermocells.
Main Methods:
- Adopting established theory to define the Thiele modulus as a key dimensionless parameter.
- Applying the theory to experimentally obtained data from carbon fiber electrodes.
Main Results:
- The Thiele modulus effectively describes the diffusion effect on current generation.
- Experimental data for carbon fiber electrodes are quantitatively explained by the developed theory.
Conclusions:
- The presented theory offers a quantitative basis for selecting and designing porous electrodes for thermocells.
- This work provides foundational insights for developing electrochemical devices utilizing highly porous electrodes.
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