Pushing the Limits of Heat Conduction in Covalent Organic Frameworks Through High ‐Throughput Screening of Their Thermal Conductivity

High-throughput screening of 10,750 covalent organic frameworks for thermal conductivity demonstrates that the strategic modulation of their chemical and structural features can lead to large tunability in their thermal conductivity, which can range from ultralow ( ≈0.02 W m−1 K−1) to exceptionally high ( ≈50 W m−1 K−1) values. AbstractTailor-made materials featuring large tunability in their thermal transport properties are highly sought-after for diverse applications. However, achieving `user-defined ’ thermal transport in a single class of material system with tunability across a wide range of thermal conductivity values requires a thorough understanding of the structure-property relationships, which has proven to be challenging. Herein, large-scale computational screening of covalent organic frameworks (COFs) for thermal conductivity is performed, providing a comprehensive understanding of their structure-property relationships by leveraging systematic atomistic simulations of 10,750 COFs with 651 distinct organic linkers. Through the data-driven approach, it is shown that by strategic modulation of their chemical and structural features, the thermal conductivity can be tuned from ultralow (≈0.02 W m−1 K−1) to exceptionally high ( ≈50 W m−1 K−1) values. It is revealed that achieving high thermal conductivity in COFs requires their assembly through carbon –carbon linkages with densities greater than 500 kg m−3, nominal void fractions (in the r...
Source: Small - Category: Nanotechnology Authors: Tags: Research Article Source Type: research