Abstract: Provided in the present application is a negative pressure formation method for lithium iron manganese phosphate batteries and batteries applying the same. The method includes following steps: performing a vacuumizing process, a resting process and a charging process for a semi-finished battery cell to obtain a post-formation battery cell; the charging process is a three-stage constant-current charging process, wherein in the three-stage constant-current charging process, a charging current I, and a state of charge S are required to satisfy following relations: in a first stage constant-current charging process, I1?0.1 C, state of charge: 5%?S1?15%; in a second stage constant-current charging process, 0.05 C?I2?0.15 C, state of charge: 15%?S2?25%; and in a third stage constant-current charging process, 0.15 C?I3?0.25 C, state of charge: 35%?S3?45%.

Abstract: Provided in the present application is an anode active material, in which a preparation method of the anode active material includes steps as follows: in step 1, mixing graphite particles, sodium tetraborate and amorphous carbon, pulping with mixed particles prepared therefrom, thereby obtaining a mixed slurry, in which a feeding amount of materials mentioned above meets as follows: a mass of the graphite particles:a mass of the amorphous carbon=2˜4:6˜8, a mass of the sodium tetraborate:a mass of the graphite particles=0.07˜0.12:1, and the graphite particles include synthetic graphite; in step 2, spray-drying the mixed slurry, and solid particles obtained therefrom are used as a precursor; and in step 3, heating the precursor for 18˜34 hours at 2000˜3000° C. so as to prepare and obtain the anode active material.

Abstract: Specifically disclosed in the present application is a lithium iron manganese phosphate cathode material, preparation method and application thereof. The lithium iron manganese phosphate cathode material includes a lithium iron manganese phosphate substrate and a coating layer on a surface of the lithium iron manganese phosphate substrate; the coating layer includes carbon quantum dots containing amino groups; and a mass ratio of manganese ions to carbon quantum dots containing amino groups is (4.5˜5.5):1 in the lithium iron manganese phosphate cathode material.