| 摘要 |
<p>The invention relates to novel materials of the formula: A1-delta M1 V M2 W M3 X M4 Y M5 Z O2 wherein A is one or more alkali metals comprising sodium and/or potassium either alone or in a mixture with lithium as a minor constituent; M1 is nickel in oxidation state +2; M2 comprises a metal in oxidation state +4selected from one or more of manganese, titanium and zirconium; M3 comprises a metal in oxidation state +2, selected from one or more of magnesium, calcium, copper, zinc and cobalt; M4 comprises a metal in oxidation state +4, selected from one or more of titanium, manganese and zirconium; M5 comprises a metal in oxidation state +3, selected from one or more of aluminium, iron, cobalt, molybdenum, chromium, vanadium, scandium and yttrium; wherein 0 <=delta<=0.1 V is in the range 0 < V <0.5; W is in the range 0 <W<= 0.5; X is in the range 0 <= X < 0.5; Y is in the range 0 <= Y < 0.5; Z is >=0; and further wherein V + W + X + Y + Z = 1. Such materials are useful, for example, as electrode materials in sodium ion battery applications.</p> |
