Composite for cathode of li-ion battery, its preparation process and the li-ion battery

Abstract

Disclosed herein is composite for the cathode of Li-ion battery comprising: a first component and a second component represented by LiNi0.5Mn1.5O2; wherein the first component contains active material or surface treated active material, wherein the active material is represented by a formula Li1+a(Ni1−b−cCobMnc)O2, 0≤a≤0.5, 0≤b≤0.4, 0≤c≤0.6, with b+c<1; based on the total amount of the composite, the content of the second component is 1 wt % to 30 wt %. Also disclosed herein is a Li-ion battery comprising a cathode, an anode and a separator sandwiched therebetween, wherein the cathode contains the above mentioned composite. The present disclosure provides a cathode material for Li-ion batteries with greater high voltage stability, high voltage capacity retention, high energy density and greater cycle life than the existing material.

Dependencies are inferred from the claim text.