Samsung Sdi Co., Inc.

Joa-Young Jeong

Jae-Myung Kim

Jong-Hee Lee

Yong-Mi Yu

Ji-Heon Ryu

Jong-Uk Kim

Gwang-Jin Lee

In an aspect, a composite anode active material including a lithium titanium oxide; and phosphates, a method of preparing the composite anode active material, and a lithium battery including the composite anode active material is provided.

Composite anode active material, method of preparing the same, and lithium battery including the composite anode active material

A negative active material comprising lithium titanate oxide having an area ratio of a diffraction peak of a (111) plane that appears at 2&#x3b8;=18.3&#xb0;&#xb1;0.4 to a diffraction peak of a (311) plane that appears at 2&#x3b8;=35.5&#xb0;&#xb1;0.4, in an XRD spectrum, in the range of about 2.2:1 to about 5.5:1, a negative electrode comprising the negative active material, a lithium secondary battery comprising the negative electrode, and a method of preparing the negative active material.

Negative active material, negative electrode including the same, lithium secondary battery including negative electrode, and method of preparing negative active material

A negative electrode active material, a method of preparing the negative electrode active material and a lithium secondary battery including the negative electrode active material are disclosed. A negative electrode active material includes a lithium titanate, wherein a portion of lithium of the lithium titanate is substituted by at least one selected from the group consisting of Sr, Ba, a mixture thereof and an alloy thereof, and thus a lithium secondary battery including the negative electrode active material may improve high-rate discharge characteristics.

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Yongin-si, South Korea

Joa-Young Jeong