Samsung Sdi Co., Inc.

Mk Electron Co., Ltd.

Yungu Cho

Jaehyuk Kim

Hana Yoo

Heeyoung Chu

Deokhyun Kim

Soonsung Suh

Jaemyung Kim

Hyun Soh

Ickkyu Choi

Jongsoo Cho

Doori Oh

Soonsung Seo

Heesang Jeon

Yoonyoung Choi

A composite anode and a secondary battery including the same are disclosed. The composite anode includes a silicon-containing structure; a first carbon material; a second carbon material; and a conductive material, wherein the first carbon material has a specific surface area (BET) value of 1.5 m/g or less, a rate of change of the specific surface area (m/g) to an increase in particle size (μm) is −0.07 to −0.04 m/μm·g, and an area occupied by pores in a cross-section of the first carbon material is 10% or less.

Composite anode, and lithium secondary battery comprising the same

Anode active materials for lithium secondary batteries are provided. According to embodiments of the present disclosure, an anode active material includes: i) a first composite including at least two active silicon materials having different crystal sizes and a silicon oxide (SiO) material (wherein 0<x≤2); ii) a second composite including an active silicon material having a crystal size of about 24 nm or greater and a silicon oxide (SiO) material (wherein 0<x≤2), mixed with a carbonaceous material; or a mixture or combination of (i) and (ii). A lithium secondary battery is provided including an anode including any one of the anode active materials.

Anode active material for lithium secondary battery and lithium secondary battery comprising anode including the anode active material

Anode active materials for lithium secondary batteries are provided. According to embodiments of the present disclosure, an anode active material includes: i) a first composite including at least two active silicon materials having different crystal sizes and a silicon oxide (SiO) material (wherein 0&#x3c;x&#x2264;2); ii) a second composite including an active silicon material having a crystal size of about 24 nm or greater and a silicon oxide (SiO) material(wherein 0&#x3c;x&#x2264;2), mixed with a carbonaceous material; or a mixture or combination of (i) and (ii). A lithium secondary battery is provided including an anode including any one of the anode active materials.

Provided are a negative active material, an anode and a lithium secondary battery including the same, and a method of preparing the negative active material. The negative active material includes a silicon alloy core including silicon, iron, and manganese, and a shell including a metal oxide on the silicon alloy core, the metal oxide including one or more of titanium, zirconium, aluminum, cobalt, or lithium. An amount of the metal oxide may be from greater than 0 wt % to less than about 12 wt % based on a total weight of the negative active material.

Negative active material having a silicon alloy core and a shell including a metal oxide, negative electrode and lithium secondary battery including the same, and method of preparing the negative active material

A negative electrode active material for a lithium secondary battery including silicon (Si), manganese (Mn), Component A including at least one selected from iron (Fe), molybdenum (Mo), chromium (Cr), zinc (Zn), titanium (Ti), nickel (Ni), vanadium (V), tungsten (W), and yttrium (Y), and Component B including at least one selected from carbon (C), boron (B), oxygen (O), nitrogen (N), phosphorous (P), and sulfur (S), wherein a total amount of Si, Mn, and Component A is about 70 atom % or less, an amount of Component B is 30 atom % or more, and a total amount of Mn and Component A is in a range of about 10 atom % to about 35 atom %.

Negative electrode active material for lithium secondary battery, and lithium secondary battery including negative electrode including the negative electrode active material

Growing community of inventors

Yongin-si, South Korea

Yungu Cho