In-situ structural evolution of Zr-doped Na sub 3 /sub V sub 2 /sub (PO sub 4 /sub ) sub 2 /sub F sub 3 /sub coated by N-doped carbon for SIB eurekalert.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from eurekalert.org Daily Mail and Mail on Sunday newspapers.