ИСТИНА

Mixed titanium niobium oxides are considered as safe anode materials for lithium-ion batteries (LIBs) with long cycling life. Their benefits are provided by both structure stability and relatively high working potentials of Ti(IV)/Ti(III) and Nb(V)/Nb(IV) redox couples (1.3 – 1.6 V vs. Li/Li+). Direct synthesis allows obtaining only a few titanoniobates, which are very similar to TiNb2O7 and are characterized by a high relative Nb content. The use of «soft» chemistry approaches, including the ion exchange method, resulted in the discovery of a new class of layered titanoniobates ATiNbO5 (A = H+, Li+, Na+), which are promising as anode materials for LIBs. This work is aimed to the synthesis and comprehensive study of ATiNbO5 as anode materials for metal-ion batteries.