| CPC H01M 4/364 (2013.01) [C01B 25/455 (2013.01); H01M 4/5825 (2013.01); H01M 4/622 (2013.01); H01M 10/054 (2013.01); C01P 2002/52 (2013.01); C01P 2002/72 (2013.01); C01P 2004/04 (2013.01); C01P 2006/40 (2013.01)] | 14 Claims |

|
1. A sodium-ion storage material comprising
an Na3V2-xMx(PO4)2F3/Na3V2-xMx(PO4)3 composite (0<x<2),
wherein M is a transition metal.
|