▎ 摘　　要

NOVELTY - Anode active material of (1), is new. USE - The anode active material is useful for anode used in battery (all claimed) e.g. lithium ion battery used in electric automobile and small electronic device. ADVANTAGE - The anode active material can increase the electronic conductivity, improve the lithium ion migration coefficient, and has high energy density under the low temperature condition, good multiplying power performance, and large current charging and discharging. The lithium ion battery has high discharge voltage, high energy densities, excellent rate performance cycle performance, simple preparation method, convenient operation, low cost, and is good for industrial production. The battery at -20℃ has capacity retention rate of 0.2C current density of 88.67% with good safety performance, multiplied power performance and cycle performance. DETAILED DESCRIPTION - Anode active material of LiNi0.5-xMn1.5CoxO4(1), is new. x = 0-0.15. INDEPENDENT CLAIMS are included for: a preparation of the active anode material; a battery, comprising anode sheet, a cathode sheet, a diaphragm and an electrolyte, where the anode sheet includes a binder, a conductive agent and the anode active material; and a preparation method of battery, comprising adding a binder, conducting agent, solvent and anode active material, mixing, obtaining slurry, coating the slurry on the current collector to obtain the anode sheet, cathode active material, binding agent, conductive agent and solvent, mixing to obtain slurry, coating the slurry on the current collector to obtain the cathode sheet, assembling the cathode sheet, separator, electrolyte and anode sheet to obtain a battery.