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The objectives of this bilateral research project was the design and synthesis of new phosphonate-based organic-inorganic hybrids to be possibly used as innovative starting materials for the production of LiFePO4/C nanocomposites. In this regard the research teams proposed to prepare new hybrid phosphonates containing Mn(II), Fe(II) and Fe(III) ions starting from commercially available carboxyethyl phosphonic acid. Although quite a huge number of attempts to prepare a suitable precursor material which contains Li, P, O, C and Fe(II) or Fe(III) or even Mn(II) in the same molecule had been undertaken no phosphonate-based hybrid compounds containing lithium have been isolated. Also subsequent chemical lithiation of Fe(II) and Fe(III) carboxyethylphosphonates was not successful. High temperature decomposition experiments on intimate mixtures of pure crystalline Fe(II) carboxyethylphosphonate and lithium phosphate resulted in formation of lithium iron phosphate, LiFePO4, the final goal of this project, but the obtained decomposition products were a mixture of black fine powdered lithium iron phosphate and several dark red iron oxides. The Italian team, which had just acquainted expertise in the creation of modern e-learning platforms based on Moodle software, have trained the Egyptian partner in the framework of this project on the creation of Moodle-based e-learning courses. Both teams collaborated on the development of a free-access e-learning course entitled "Chemistry of Energy Storage Materials". The latter is accessible at the following link: http://minerva.mlib.cnr.it/course/view.php?id=11 and its content has been used as a basis for chemistry students at Assiut University. |
