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Chemically driven energetic molecular ferroelectrics
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DOI：10.1038/s41467-021-26007-2.png)
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Abstract
En 中文
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(-1). Such a molecular ferroelectric crystal shows an estimated detonation velocity of 7.20 +/- 0.27 km s(-1) 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. An interest arises if energetic molecules and molecular ferroelectrics can be integrated together to obtain a chemically driven electricity conversion. Here, the authors explore energetic molecular ferroelectrics consisting of imidazolium cations and perchlorate anions with a high-power density.
Keywords:
CONDUCTIVITY
PERCHLORATE
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