IRON OXYHYDROXYNITRATE HAVING PHOSPHORIC ACID ANION-ADSORBED SURFACE, PREPARATION METHOD THEREFOR, CATHODE COMPRISING IRON OXYHYDROXYNITRATE HAVING PHOSPHORIC ACID ANION-ADSORBED SURFACE FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

The present invention relates to an iron oxyhydroxynitrate with hydrogen phosphate ions adsorbed on its surface, a method for preparing the same, a positive electrode for a lithium secondary battery comprising the iron oxyhydroxynitrate with hydrogen phosphate ions adsorbed on its surface as a positive electrode additive, and a lithium secondary battery comprising the same.