Chemically driven energetic molecular ferroelectrics.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 34588459.
- Also identified by DOI 10.1038/s41467-021-26007-2 and PMC identifier 8481480.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Chemically driven thermal wave triggers high energy release rate in covalently-bonded molecular energetic materials. Molecular ferroelectrics bridge thermal wave and electrical energy by pyroelectric associated with heating frequency, thermal mass and heat transfer. Herein we design energetic molecular ferroelectrics consisting of imidazolium cations (energetic ion) and perchlorate anions (oxidizer), and describe its thermal wave energy conversion with a specific power of 1.8 kW kg<sup>-1</sup>. Such a molecular ferroelectric crystal shows an estimated detonation velocity of 7.20 ± 0.27 km s<sup>-1</sup> comparable to trinitrotoluene and hexanitrostilbene. A polarization-dependent heat transfer and specific power suggests the role of electron-phonon interaction in tuning energy density of energetic molecular ferroelectrics. These findings represent a class of molecular ferroelectric energetic compounds for emerging energy applications demanding high power density.