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Concreting at elevated temperatures accelerates the hydration process, leading to quicker setting but potentially reducing the long-term strength of the concrete structure. Additionally, low air humidity fosters rapid moisture loss from the concrete, resulting in reduced workability, pronounced plastic shrinkage, and a higher likelihood of crazing.
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Will organic thermoelectrics get hot?

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Carbon-based materials offer versatile solid-state thermoelectric energy harvesting. Improving charge carrier mobility and reducing thermal conductivity in these materials can significantly boost thermoelectric efficiency for a low-carbon future.

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Area of Science:

  • Materials Science
  • Energy Harvesting
  • Thermoelectric Devices

Background:

  • Solid-state thermoelectric devices are versatile heat harvesters, suitable for small-scale applications and low temperature differences.
  • Carbon-based materials like conducting polymers and carbon nanotubes are abundant, low-toxicity, and processable, making them ideal for large-area thermoelectric applications.

Purpose of the Study:

  • To discuss materials requirements for widespread thermoelectric adoption.
  • To evaluate performance limitations of current thermoelectric technology.
  • To propose strategies for enhancing thermoelectric efficiency in organic materials.

Main Methods:

  • Analysis of experimentally observed macro-trends in thermoelectric materials.
  • Application of basic thermoelectric relations to identify performance bottlenecks.
  • Exploration of material design strategies, including composites and interface engineering.

Main Results:

  • Charge carrier mobility, not charge density, is the primary performance limiter.
  • Reducing thermal conductivity can potentially double thermoelectric efficiency.
  • Composites and interface engineering offer pathways to further performance improvements.

Conclusions:

  • Carbon-based materials show significant promise for advanced thermoelectric applications.
  • Targeting charge carrier mobility and thermal conductivity is crucial for next-generation thermoelectric devices.
  • Interface engineering in composites can lead to novel phonon-electron interactions for enhanced performance.