The first series of single-source molecular precursors for sodium ion battery cathode materials are reported. Heterometallic �-diketonates NaM(hfac)3 (M = Mn, Fe, Co, and Ni; hfac = 1,1,1,5,5,5-hexafluoro-2,4-pentanedionate) were obtained in high yield by simple solid-state reactions employing commercially available reagents. Substantial scale-up preparation was achieved using a solution approach. The crystal structure of precursors consists of infinite polymeric molecules held together by diketonate ligands acting in chelating-bridging mode. The compounds are relatively stable in open air, highly volatile, and soluble in common coordinating solvents. Heterometallic diketonate precursors were shown to exhibit clean, low-temperature decomposition in inert atmosphere that results in phase-pure pervoskite-type fluorides NaMF3, prospective cathode materials for sodium ion batteries.

Volatile heterometallic precursors for prospective sodium ion battery cathode materials

246th National Meeting (2013)

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