Samsung Sdi Co., Inc.

Sang-Eun Park

Young-Ugk Kim

Jae-Myung Kim

Ui-Song Do

Chang-Su Shin

So-Ra Lee

Su-Kyung Lee

Yu-Jeong Cho

Kyu-Nam Joo

Hyun-Ki Park

Ha-Na Yoo

Young-Min Kim

Duck-Chul Hwang

Sang-Min Lee

Deok-Hyun Kim

Sung-Su Kim

Dong-Hee Han

Young-Jun Lee

Young-Hwan Kim

Yeon-Gap Kim

Seung-Ho Na

Tae-Geun Kim

Ung-Kuk Heo

Deuk-Hwa Lee

A negative active material for a rechargeable lithium battery includes a core including a SiOmatrix and a Si grain, and a coating layer continuously or discontinuously coated on the core. The coating layer includes SiC and C, and the peak area ratio of the SiC (111) plane to the Si (111) plane as measured by X-ray diffraction analysis (XRD) using a CuKα ray ranges from about 0.01 to about 0.5.

Negative active material for rechargeable lithium battery, method of preparing the same and rechargeable lithium battery including the same

A negative active material for a rechargeable lithium battery includes a core including a SiOmatrix and a Si grain, and a coating layer continuously or discontinuously coated on the core. The coating layer includes SiC and C, and the peak area ratio of the SiC (111) plane to the Si (111) plane as measured by X-ray diffraction analysis (XRD) using a CuK&#x3b1; ray ranges from about 0.01 to about 0.5.

In an aspect, a negative active material for a rechargeable lithium battery including surface modified silicon oxide particles is disclosed.

Negative active material for rechargeable lithium battery, method preparing the same and rechargeable lithium battery including the same

A negative active material, a negative electrode, a lithium battery including the negative active material, and a method of preparing the negative active material. The negative active material includes a crystalline carbonaceous substrate; and metal oxide nanoparticles disposed on a surface of the crystalline carbonaceous substrate, wherein the metal oxide nanoparticles have a rutile structure. The negative active material may be used to improve high temperature stability and lifespan characteristics of a lithium battery.

Negative active material, lithium battery including the material, and method of manufacturing the material

Provided is a lithium battery including: a positive electrode, a negative electrode, and an organic electrolytic solution, wherein the negative electrode has a metal/metalloid nanostructure, and the organic electrolytic solution includes a lithium sulfonimide-based compound.

Lithium battery

In an aspect, a negative active material, a negative electrode and a lithium battery including the negative active material, and a method of manufacturing the negative active material is provided. The negative active material includes a silicon-based active material substrate; a metal oxide nanoparticle disposed on a surface of the silicon-based active material substrate. An initial irreversible capacity of the lithium battery may be decreased and lifespan characteristics may be improved by using the negative active material.

Negative active material and negative electrode and lithium battery containing the material, and method of manufacturing the same

A negative active material includes a conductive unit bound in island-like form to silicon-based nanowires on a carbonaceous base. Such negative active material may improve the electrical conductivity of the silicon-based nanowires, and suppress separation of the silicon-based nanowires caused from volume expansion, and thus may improve lifetime characteristics of a lithium battery.

Negative active material, negative electrode, and lithium battery

According to an embodiment of the present invention, a negative active material for a rechargeable lithium battery includes silicon oxide particles represented by SiO(where 0&#x3c;x&#x3c;2) in which an atom % of a silicon phase decreases in a concentration gradient according to a depth from the surface of each particle to the center of the particle, and has an atom % of an O phase that increases in a concentration gradient. In the atom % concentration graph of the silicon (Si) phase according to the depth, the integral value of the atom % concentration of the silicon (Si) phase from the surface (where the depth is 0) to a depth where the concentration of the silicon (Si) phase is 55 atom % is about 5000 to about 40000 nm&#xb7;atom %.

A composite anode active material, an anode and a lithium battery each including the composite anode active material, and a method of preparing the composite anode active material. The composite anode active material includes a composite core, and a coating layer covering at least a region of the composite core, wherein the composite core includes a carbonaceous substrate and a metal/semi-metal nanostructure on the carbonaceous substrate, the coating layer is more predominant on the nanostructure than on the carbonaceous substrate, and the coating layer includes a metal oxide.

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

In an aspect, a composite anode active material including: a porous particles, said porous particles including: a plurality of composite nanostructures; and a first carbonaceous material binding the composite nanostructures, wherein the porous particles have pores within the particle, and wherein the composite nanostructures include a crystalline second carbonaceous material substrate including at least one carbon nano-sheet, and a plurality of metal nanowires arranged at intervals on the crystalline second carbonaceous material substrate is disclosed.

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

A negative active material and a lithium battery are provided. The negative active material includes a composite core, and a coating layer formed on at least part of the composite core. The composite core includes a carbonaceous base and a metal/metalloid nanostructure disposed on the carbonaceous base. The coating layer includes a metal oxide coating layer and an amorphous carbonaceous coating layer.

Negative active material, and negative electrode and lithium battery each including the negative active material

A silicon-based negative active material that includes a core including silicon oxide represented by SiO(0&#x3c;x&#x3c;2); and a coating layer including metal oxide, and the metal of the metal oxide includes aluminum (Al), titanium (Ti), cobalt (Co), magnesium (Mg), calcium (Ca), potassium (K), sodium (Na), boron (B), strontium (Sr), barium (Ba), manganese (Mn), nickel (Ni), vanadium (V), iron (Fe), copper (Cu), phosphorus (P), scandium (Sc), zirconium (Zr), niobium (Nb), chromium (Cr), and/or molybdenum (Mo), the core has a concentration gradient where an atom % concentration of a silicon (Si) element decreases to the center of the core, and an atom % concentration of an oxygen (O) element increases to the center, and a depth from the surface contacting the coating layer where a concentration of the silicon (Si) element is about 55 atom % corresponds to about 2% to about 20% of a diameter of the core.

Growing community of inventors

Yongin-si, South Korea

Sang-Eun Park