| abstract |
(A) dissolving a sodium (Na) precursor, a manganese (Mn) precursor and a phosphoric acid (PO 4 ) precursor in a solvent to prepare a precursor solution; And (b) a sodium secondary battery with NaMnPO 4 and this, prepared according to the method, the method comprising the steps of sodium manganese in oxide (NaMnPO 4) containing the reacted under supercritical conditions, by putting the precursor solution to the reactor . According to the present invention, since NaMnPO 4 can be continuously produced at a low temperature in a simple manner, productivity can be improved and cost can be reduced. |