Evaluation of SiO_2 and TiO_2 coated BaFeO_4 cathode materials for zinc alkaline and lithium non-aqueous primary batteries

摘要

Barium ferrate material was coated with nanoparticulate thin films of SiO_2 and TiO_2 using sol-gel techniques, and was evaluated for use in both zinc-alkaline and lithium non-aqueous batteries. Iron(VI) content was monitored for ferrate materials stored under dry conditions and wetted with KOH and LiPF_6 electrolytes. Coated barium ferrate demonstrated improved stability relative to uncoated BaFeO_4. SiO_2 coated materials do not appear to be useful for either zinc alkaline or lithium non-aqueous systems at this time. TiO_2 coated materials demonstrated poor shelf life in alkaline electrolyte, but provided somewhat more favorable results in the lithium cells.