Positive active material, and electrode and lithium battery containing the positive active material
OwnerJun-Sik Kim, Chong-Hoon Lee +3inventors
InventorsJun-Sik Kim, Chong-Hoon Lee, Sung-Soo Kim, Seo-Jae Lee, Jeong-Soon Shin
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Abstract
Embodiments of the present invention are directed to a positive active material, an electrode including the positive active material, and a lithium battery including the electrode. Due to the inclusion of a phosphate compound having an olivine structure and a lithium nickel composite oxide in the positive active material, the positive active material has high electric conductivity and high electrode density. A lithium battery manufactured using the positive active material has high capacity and good high-rate characteristics.
Claims20
A positive active material for a lithium rechargeable battery, comprising:
- about 70 wt % to about 99 wt % of a phosphate compound having an olivine structure;
- and
- about 1 wt % to about 30 wt % of a lithium nickel composite oxide.
A positive electrode for a rechargeable lithium battery, comprising a positive active material comprising:
- about 70 wt % to about 99 wt % of a phosphate compound having an olivine structure;
- and
- about 1 wt % to about 30 wt % of a lithium nickel composite oxide.
A lithium rechargeable battery, comprising:
- a positive electrode comprising a positive active material comprising:
- about 70 wt % to about 99 wt % of a phosphate compound having an olivine structure;
- and
- about 1 wt % to about 30 wt % of a lithium nickel composite oxide;
- a negative electrode comprising a negative active material;
- and
- an electrolyte.
Dependencies are inferred from the claim text.