▎ 摘　　要

NOVELTY - Anode electrode sheet, is claimed. The anode sheet surface is coated with anode slurry including graphene coated lithium iron phosphate. The mass ratio of graphene and lithium iron phosphate is 2-10:100. USE - The anode sheet is useful for lithium ion battery (claimed). ADVANTAGE - The anode sheet: has excellent circulation performance, performance times and high energy density; and achieves the power requirements of the battery for industry development. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the anode sheet, comprising (i) adding lithium acetate, iron oxalate and ammonium dihydrogen phosphate to graphene oxide solution, and stirring to obtain a first product, (ii) heating the first product, then rapidly cooling, and drying to obtain a second product, (iii) heating the second product to a heating temperature T1, and calcining to obtain a third product, and (iv) heating the third product to a heating temperature T2, and calcining to obtain a fourth product; (2) lithium ion battery, comprising the anode sheet; and (3) preparing the lithium ion battery, comprising (i) pairing the anode sheet and lithium metal sheet, connecting to a charging circuit, and removing lithium from the anode sheet, (ii) subjecting the cathode sheet to charging process, pairing with lithium metal sheet, and discharging the connection circuit to obtain pre-lithium cathode sheet, and (iii) assembling the lithium-removed anode sheet and pre-lithium cathode sheet to obtain the battery.