Abstract: The invention relates to electrodes that contain active materials of the formula: AaMbXxOy wherein A is one or more alkali metals selected from lithium, sodium and potassium; M is selected from one or more transition metals and/or one or more non-transition metals and/or one or more metalloids; X comprises one or more atoms selected from niobium, antimony, tellurium, tantalum, bismuth and selenium; and further wherein 0<a?6; b is in the range: 0<b?4; x is in the range 0<x?1 and y is in the range 2?y?10. Such electrodes are useful in, for example, sodium and/or lithium ion battery applications.

Abstract: The invention relates to electrodes that contain active materials of the formula: AaMbXxOy wherein A is one or more alkali metals selected from lithium, sodium and potassium; M is selected from one or more transition metals and/or one or more non-transition metals and/or one or more metalloids; X comprises one or more atoms selected from niobium, antimony, tellurium, tantalum, bismuth and selenium; and further wherein 0<a?6; b is in the range: 0<b?4; x is in the range 0<x?1 and y is in the range 2?y?10. Such electrodes are useful in, for example, sodium and/or lithium ion battery applications.

Abstract: The invention relates to novel electrodes containing one or more active materials comprising: AaM1vM2wM3xM4YM5zO2?C(Formula 1) wherein A comprises either sodium or a mixed alkali metal in which sodium is the constituent; M1 is nickel in oxidation state less than or equal to 4+, M2 comprises a metal in oxidation state less than or equal to 4+, M3 comprises a metal in oxidation state 2+, M4 comprises a metal in oxidation state less than or equal to 4+, and M5 comprises a metal in oxidation state 3+ wherein 0?a?1 v>0 at least one of w and y is >0 x?0 z?0 c>0.1 where (a, v, w, x, y, z and c) are chosen to maintain electroneutrality. Such materials are useful, for example, as electrode materials in sodium-ion battery applications.

Abstract: The invention relates to electrodes that contain active materials of the formula: NaaXbMcM?d(condensed polyanion)e(anion)f; where X is one or more of Na+, Li+ and K+; M is one or more transition metals; M? is one or more non-transition metals; and where a>b; c>0; d?0; e?1 and f?0. Such electrodes are useful in, for example, sodium ion battery applications.