Cathode composite material and lithium ion battery using the same
AssigneesHon Hai Precision Industry Co., Ltd., Tsinghua University
InventorsYA-DONG LI, JUN LU, DING-SHENG WANG, XIANG-WEN LIU, QING PENG
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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 transition metal oxide. A material of the coating layer is 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.
Claims20
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 transition metal 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 +4 valence, M and N respectively represent doping chemical elements, “□” represents an atom vacancy occupying a Li site of [Li][Li1/3A2/3A2/3]O2, 0<2a<1, 0<2b+c<1/3, and 0<2c<2/3.
(canceled)
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 cathode active material particles comprises a layered type lithium transition metal 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.
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 transition metal 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, the coating layer comprises a material that is selected from the group consisting of Li2TiO3, Li2SnO3, Li2PbO3, Li2TeO3, Li2RuO3, Li2HfO3, Li2ZrO3, and combinations thereof.
Dependencies are inferred from the claim text.