Reactivity and stabilization mechanisms of AlH3 crystals coated with polyvinylidene difluoride

Yiran Zhang, Haorui Zhang, Minghui Yu, Qi Long Yan

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Aluminum hydride (AlH3) is considered as one of the most promising high-energy hydrogen-storage fuels. Various studies have been conducted to improve its thermostability and compatibility with polar plasticizers. As frequently reported, polyvinylidene difluoride (PVDF) has inherent advantages as a coating agent of AlH3 to improve its stability and compatibility. However, its optimal content and the interaction mechanisms with AlH3 are still not clear. In this study, AlH3 crystals coated with different contents of PVDF have been prepared and their thermochemical properties have been analyzed by using VST and DSC/TG techniques. In addition, the effect of PVDF on decomposition reaction pathways of AlH3 and AlH3@Al2O3 have been investigated using RMD simulations. It has been found that if the content of PVDF is less than 8%, it may enhance the stability of AlH3. However, once the content is over 20%, the decomposition of AlH3 would be promoted. In addition, even if PVDF can inhibit the initial dehydrogenation of AlH3 during the induction period, once the fast exothermic reactions initiate, the corresponding energy barriers would be lowered with faster H2 release.

Original languageEnglish
Pages (from-to)6208-6218
Number of pages11
JournalCrystEngComm
Volume26
Issue number43
DOIs
StatePublished - 3 Oct 2024

Fingerprint

Dive into the research topics of 'Reactivity and stabilization mechanisms of AlH3 crystals coated with polyvinylidene difluoride'. Together they form a unique fingerprint.

Cite this