Method for producing a positive electrode material comprising at least one Na-based solid crystalline phase by ball milling using Na3P

摘要

The present invention relates to a method for producing a positive electrode material comprising at least one Na-based solid crystalline phase selected in the group consisting of Na-based crystalline P′2-phases, Na-based solid crystalline phases of formula Na_(3+x)V₂(PO₄)₃ with 0x≤3 and Na-based solid crystalline phases of formula Na_(3+y)V₂(PO₄)₂F₃ with 0y≤3, for a battery using sodium ions as electrochemical vector, said method using a ball milling process involving Na₃P as starting material.