Cathode composite material and lithium ion battery using the same
AssigneesTsinghua University, Hon Hai Precision Industry Co., Ltd.
InventorsYa-Dong Li, Jun Lu, Ding-Sheng Wang, Qing Peng
Life of this patent
Estimating the term…
Abstract
A cathode composite material includes a cathode active material and a coating layer coated on a surface of the cathode active material. The cathode active material includes a layered type lithium nickel cobalt manganese oxide. The coating layer comprises a lithium metal oxide having a crystal structure belonging to C2/c space group of the monoclinic crystal system. The present disclosure also relates to a lithium ion battery including the cathode composite material.
Claims18
A cathode composite material comprising a cathode active material and a coating layer coated on a surface of the cathode active material, the cathode active material comprises a layered type lithium nickel cobalt manganese oxide, the coating layer comprises a lithium metal oxide having a crystal structure that belongs to C2/c space group of the monoclinic crystal system, wherein a general formula of the lithium metal oxide is [Li1-2aMa□a][Li1/3-2b-cMbN3cA2/3-2c□b]O2, wherein A represents a metal element having a +4valence, M and N respectively represent doping chemical elements, “□” represents an atom vacancy occupying a Li site of [Li][Li1/3A2/3]O2, 0≦2a<1, 0≦2b+c<1/3, and 0≦2c<2/3.
A lithium ion battery comprising:
- an anode electrode;
- a cathode electrode comprising a cathode composite material comprising a plurality of cathode active material particles and a coating layer coated on a surface of each of the plurality of cathode active material particles, each of the plurality of the cathode active material particles comprises a layered type lithium nickel cobalt manganese oxide, the coating layer comprises a lithium metal oxide having a crystal structure belonging to C2/c space group of the monoclinic crystal system;
- and
- a non-aqueous electrolyte disposed between the cathode electrode and the anode electrode, wherein a general formula of the lithium metal oxide is [Li1-2aMa□a][Li1/3-2b-cMbN3cA2/3-2c□b]O2, wherein A represents a metal element having a +4 valence, M and N respectively represent doping chemical elements, “□” represents an atom vacancy occupying a Li site of [Li][Li1/3A2/3]O2, 0≦2a<1, 0≦2b+c<1/3, and 0≦2c<2/3.
Dependencies are inferred from the claim text.