Samsung Sdi Co., Inc.

Snu Rdb Foundation

Young-Ugk Kim

Sang-Eun Park

Jae-Hyuk Kim

Chang-Ui Jeong

Seung-Uk Kwon

Soon-Sung Suh

Duk-Hyoung Yoon

Hee-Young Chu

Yo-Han Park

Yury Matulevich

Jae-Yul Ryu

Wan-Uk Choi

Jea-Woan Lee

Joon-Sup Kim

Seung-Hee Park

Jin-Hee Moon

Chang-Keun Back

Yong-Bum Lee

Young-Min Kim

Jae-Myung Kim

Duck-Chul Hwang

Sang-Min Lee

Deok-Hyun Kim

Kyu-Nam Joo

Sung-Su Kim

Ui-Song Do

Chang-Su Shin

Hyun-Ki Park

Young-Jun Lee

Yeon-Gap Kim

Young-Hwan Kim

Seung-Ho Na

Tae-Geun Kim

Ung-Kuk Heo

Deuk-Hwa Lee

Kyu-Hwan Oh

Seoung-Bum Son

Seul-Cham Kim

Chan-Soon Kang

Chang-Kuen Back

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.

An anode active material including a porous silicon having pores with a uniform average pore diameter, wherein the average pore diameter of the pores is in a range of about 50 nm to about 80 nm, a method of preparing the anode active material, and a lithium secondary battery including an anode including the anode active material.

Anode active material, method of preparing the same, and lithium secondary battery including the anode active material

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

An electrode for a lithium secondary battery including a silicon-based alloy having an expansion coefficient of 10% or greater and an electrochemically inactive whisker, and a lithium secondary battery using the electrode for a lithium secondary battery.

Electrode for lithium secondary battery and lithium secondary battery comprising the same

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, a negative electrode and a lithium battery including the same, and a method of manufacturing the negative active material are disclosed. The negative active material includes a silicon-based alloy including Si, Al, and Cu. Since the silicon-based alloy includes AlCu and AlCu as inactive phases, the lifespan of a lithium battery may be increased.

Negative active material, negative electrode and lithium battery including negative active material, and method of manufacturing negative active material

A negative active material, a lithium battery including the negative active material, and a method of preparing the negative active material. The negative active material includes a silicon-based alloy including Si, Al, and Fe. The silicon-based alloy includes an active phase of silicon nanoparticles and an inactive phase of SiAlFeand SiFe in a ratios suitable to improve the lifespan of the lithium battery.

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

Disclosed is a rechargeable lithium battery that includes a positive electrode including a lithium nickel-based positive active material; a negative electrode including a negative active material; an electrolyte including a lithium salt and a non-aqueous organic solvent; and a separator including a polymer substrate and a hydroxide compound-containing coating layer disposed on the polymer substrate.

Rechargeable lithium battery

In an aspect, an electrode active material for a lithium secondary battery, the electrode active material including a silicon-based alloy and a coating film containing a polymer that includes a 3,4-ethylenedioxythiophene repeating unit and an oxyalkylene repeating unit, coated on the surface of the silicon-based alloy are provided.

Electrode active material for lithium secondary battery, electrode for lithium secondary battery including the same, and lithium secondary battery including the electrode

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 %.

An anode active material, a lithium battery including the anode active material, and a method of preparing the anode active material are provided. The anode active material includes an alloy containing silicon (Si), titanium (Ti) and nickel (Ni) elements, wherein the alloy includes a Si phase and an alloy phase, and a peak intensity ratio (I/I) of Si(111) to Si(220) plane in a X-ray diffraction spectrum of the Si phase is from about 1.0 to about 1.5.

Anode active material, lithium secondary battery employing the same, and method of preparing the anode 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.

Silicon-based negative active material, preparing method of preparing same and rechargeable lithium battery including same

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Yongin-si, South Korea

Young-Ugk Kim