Abstract
This chapter deals with the synthesis of a MOPOF material, [K2(VO)2(HPO4)2(C2O4)] and its rGO composites for application as cathode materials for Lithium ion batteries. Synthesis of a hydrated phase, [K2(VO)2(HPO4)2(C2O4)]⋅4.5H2O was achieved at room temperature by a simple magnetic stirring. The rGO composites of the material was prepared by carrying out the reaction in the presence of graphene oxide. During the synthesis, tartaric acid was used as the organic ligand which was found to undergo in situ oxidation to oxalate resulting in formation of oxalatophosphate framework. The anhydrous phase, [K2(VO)2(HPO4)2(C2O4)] and the composite rGO/[K2(VO)2(HPO4)2(C2O4)] were obtained by dehydration of the respective hydrated phases at 120 ℃. These phases were investigated as 4 V cathode for Lithium ion batteries. The pristine compound undergoes highly reversible lithium storage with good capacity. However, there was slight capacity fading. The rGO composites (4 and 8 wt% of rGO) exhibit enhanced lithium cycling with excellent capacity retention.
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Hameed, A.S. (2016). Room Temperature Synthesis of rGO/[K2(VO)2(C2O4)(HPO4)2] for Greener and Cheaper Lithium Ion Batteries. 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_4
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DOI: https://doi.org/10.1007/978-981-10-2302-6_4
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