Samsung Sdi Co., Inc.

Snu Rdb Foundation

Yo-Han Park

Jae-Hyuk Kim

Chang-Ui Jeong

Seung-Uk Kwon

Soon-Sung Suh

Yury Matulevich

Chun-Gyoo Lee

Hee-Young Chu

Young-Ugk Kim

Duk-Hyoung Yoon

Jong-Seo Choi

Sung-Hwan Moon

Yuri Matulevich

Kyu-Hwan Oh

Seoung-Bum Son

Seul-Cham Kim

Chan-Soon Kang

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

An electrode for a lithium secondary battery includes a silicon-based alloy, and has a surface roughness of about 1 to about 10 &#x3bc;m and a surface roughness deviation of 5 &#x3bc;m or less. A method of manufacturing the electrode includes mixing an electrode composition, milling the composition, coating the milled composition on a current collector, and drying the milled composition. A lithium secondary battery includes the electrode.

Electrode for lithium secondary battery, method of manufacturing the electrode, and lithium secondary battery including the electrode

A negative active material, a negative electrode, a lithium battery including the negative active material, and a method of manufacturing the negative active material, the negative electrode, and the lithium battery. The negative active material includes a silicon-based alloy including Si, Ti, Ni, and Fe components. The silicon-based alloy includes a TiNi phase as an inactive phase and active silicon having a lower content than that of typical silicon-based alloys. The negative active material may improve discharge capacity and lifetime characteristics of lithium batteries.

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

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

A negative active material for a rechargeable lithium battery includes a Si&#x2014;Al&#x2014;Fe alloy represented by Formula 1. The Si&#x2014;Al&#x2014;Fe alloy includes a Si phase and an alloy phase, and the alloy phase includes Si, Al, and Fe in a ratio of atomic percentages of about 3:3:2:Si-Al-Fe&#x2003;&#x2003;Formula 1wherein 50 at %&#x2266;x&#x2266;90 at %, 5 at %&#x2266;y&#x2266;30 at %, 5 at %&#x2266;z&#x2266;30 at %, and x+y+z=100 at %.

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

A negative active material for a lithium battery with an improved cycle characteristic and capacity retention rate, and the negative active material comprises a plurality of particles comprising a plurality of first particles comprising Si, Ti, and Ni; and composite particles comprising a plurality of second particles in which at least one element selected from the group consisting of Cu, Fe, Ni, Au, Ag, Pd, Cr, Mn, Ti, B, and P is partially or completely deposited on surface(s) of other of first particles, a method of preparing the negative active material, and a lithium battery including a negative electrode including the negative active material.

Negative active material for lithium battery, method of preparing the negative active material, and lithium battery employing the negative active material

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

A negative active material having controlled particle size distribution of silicon nanoparticles in a silicon-based alloy, a lithium battery including the negative active material, and a method of manufacturing the negative active material are disclosed. The negative active material may improve capacity and lifespan characteristics by inhibiting (or reducing) volumetric expansion of the silicon-based alloy. The negative active material may include a silicon-based alloy including: a silicon alloy-based matrix; and silicon nanoparticles distributed in the silicon alloy-based matrix, wherein a particle size distribution of the silicon nanoparticles satisfies D10&#x2267;10 nm and D90&#x2266;75 nm.

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

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.

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Yongin-si, South Korea

Yo-Han Park