Abstract
In this chapter, synthesis of a metastable phosphate material, α I-LiVOPO4 via dehydration of a hydrothermally prepared precursor, LiVOPO4·2H2O have been presented. Single crystal X-ray diffraction analysis ascertained the formation of LiVOPO4·2H2O in the orthorhombic space group, Cmca with the lattice parameters; a = 8.9454(7) Å, b = 9.0406(7) Å and c = 12.7373(10) Å. We have also investigated the crystal structure transformation of orthorhombic LiVOPO4·2H2O to tetragonal α I-LiVOPO4 accompanying the solid-state dehydration. A probable mechanism for the phase transformation was proposed with the help of crystal structures of the two phases. Electrochemical studies on this rarely studied tetragonal phase was carried out using cyclic voltammetry and galvanostatic cycling studies which revealed its excellent lithium cycling at 4 V and a capacity of 103 mAh g−1 was obtained at a current rate of 0.1 C.
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Hameed, A.S. (2016). Synthesis and Electrochemical Studies of a Metastable, Layered Phosphate α I-LiVOPO4 . In: Phosphate Based Cathodes and Reduced Graphene Oxide Composite Anodes for Energy Storage Applications. Springer Theses. Springer, Singapore. https://doi.org/10.1007/978-981-10-2302-6_6
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