Lithium iron oxide material and preparation method thereof

The invention belongs to the field of electrochemistry, and discloses a lithium iron oxide material, and a preparation method thereof. The preparation method comprises following steps: 1, an iron source, a lithium source, a carbon source, and deionized water are mixed to obtain a mixed solution; 2, the mixed solution is subjected to grinding to control the particle size of solid particles in the mixed solution to be 0.4m or lower; 3, after grinding, the mixed solution is subjected to spray drying to obtain a lithium iron oxide precursor; and 4, the lithium iron oxide precursor is subjectedto sintering, and crushing so as to obtain the lithium iron oxide material. The using amount of the carbon source is controlled so that the carbon coating layer content in the lithium iron oxide material accounts for 0.5 to 15wt%; the molar ratio of the lithium in the lithium source to the iron in the iron source is controlled to be (5-25) : 1. The prepared lithium iron oxide material possesses excellent irreversibility and