▎ 摘　　要

NOVELTY - Preparing a single crystal high-nickel cobalt-free material comprises obtaining a single-crystal high-nickel cobalt-free precursor, mixing the single crystal high-nickel cobalt-free precursor with a lithium source to obtain compound, carrying out initial calcination to the mixed material, obtaining the first single crystal high-nickel cobalt-free calcined material, carrying out corona operation on the first single crystal high-nickel and cobalt-free calcined material, so that the first single-crystal high-nickel and cobalt-free calcined material is positively charged, and carrying out secondary calcination on the first single crystal high nickel cobalt free calcined material subjected to corona operation to obtain second single crystal high nickel cobalt free calcined material, and mixing the second single crystal high nickel cobalt free calcined material with graphene oxide solution to obtain single crystal high nickel cobalt free material. USE - The method is useful for preparing single crystal high-nickel cobalt-free material. ADVANTAGE - The second single-crystal high-nickel-nickel-free cobalt-free calcined material has improved electrochemical performance, is more conducive to the transport of lithium ion, stabilizes crystal structure of the material, improves reversibility of the material corresponding to the electrochemical reaction during the charge-discharge cycle, forms high-speed ion channel, reduces contact area between cathode material and electrolyte, and improves cycle stability and rate performance of the material. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: a single crystal high-nickel cobalt-free material; and a lithium battery, comprising a cathode, an electrolyte, a separator and a anode, where the anode comprises single crystal high-nickel cobalt-free material.