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Innovative carbon-based materials for solid state hydrogen storage and energy storage
9th World Congress on Chemistry and Medicinal Chemistry
May 13-14, 2019 | Prague, Czech Republic
Milanese Chiara
University of Pavia, Italy
Scientific Tracks Abstracts : Asian J Biomed Pharmaceut Sci
Abstract:
Alkali cluster-intercalated fullerides (ACIF) consist in crystalline nanostructures in which positively charged metal clusters are ionically bond to negatively charged C60 molecules, forming charge-transfer salts. These compounds have been recently investigated with renewed interest, appearing as a novel class of materials for hydrogen storage, thanks to their proved capability to uptake reversibly high amounts of hydrogen via a complex chemisorption mechanism. In this presentation, after a short summary on the hydrogen storage topic, the synthesis, the structural investigation and the hydrogen storage properties of Li, Na and mixed Li-Na clusters intercalated fullerides belonging to the families NaxLi12- xC60 (0 ≤ x ≤ 12) and NaxLi 6-xC60 (0 ≤ x ≤ 6) will be presented. By manometric and thermal analyses it has been proved that C60 covalently binds up to 5.5 wt% H2 at moderate temperature and pressure, thanks to the catalytic effect of the intercalated alkali clusters. Moreover, the destabilizing effect of Na in the co-intercalated NaxLi6-xC60 compounds leads to an improvement of the hydrogen-sorption kinetics by about 70%, linked to a decrease in the desorption enthalpy from 62 to 44 kJ/mol H2. The addition of Pt and Pd nanoparticles to Li fullerides increases up to 5.9 wt% H2 the absorption performances and of about 35 % the absorption rate. The ammonia storage properties of Li6C60 have also been investigated, resulting quite appealing. Being the price of C60 quite high for large scale practical applications, new cheaper C based materials are under examination. In particular, porous biochar from agricultural waste are giving quite interesting results as electrode materials for high-performance supercapacitors.
Biography:
Milanese Chiara is associate professor of Physical Chemistry at the Chemistry Department of the University of Pavia (Italy). Her main research interests regard the synthesis of innovative nanomaterials for solid state hydrogen storage and for energy storage, their physico-chemical characterization and the evaluation of their storage performance. In the last 5 years, her attention was mainly focused on C-based materials, in particular fullerene derivatives and biochar. She is author of 165 papers on materials science topics and she is expert of the IEA Task 40 “Energy storage and conversion based on hydrogen”.
E-mail: chiara.milanese@unipv.it
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