Samsung Sdi Co., Inc.

Aekyung Chemical Co., Ltd.

Snu Rdb Foundation

Seung-Uk Kwon

Jae-Hyuk Kim

Chang-Ui Jeong

Soon-Sung Suh

Yo-Han Park

Yury Matulevich

Hee-Young Chu

Young-Ugk Kim

Duk-Hyoung Yoon

Chun-Gyoo Lee

Jong-Seo Choi

Sung-Hwan Moon

Eon-Mi Lee

Byung-Joo Chung

Kwang-Sik Choi

Ha-Na Yoo

Nam-Seon Kim

Kyoung-Doo Kang

Jae-Ik Kwon

Young-Kwan Kim

Yang-soo Kim

Seo-Young Choi

Yuri Matulevich

Yang-Soo Kim

Kyu-Hwan Oh

Seoung-Bum Son

Seul-Cham Kim

Chan-Soon Kang

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

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 binder composition for a rechargeable lithium battery includes a semi-interpenetrating polymer network (semi-IPN) including a copolymer including a repeating unit represented by the following Chemical Formula 1 and a repeating unit represented by the following Chemical Formula 2 and polyacrylamide, and polyalkylene glycol.  In Chemical Formula 1, Rand Rare the same or different and are independently selected from hydrogen, or a substituted or unsubstituted C1 to C10 alkyl group, and Rand Rare an alkali metal. In Chemical Formula 2, Rto Rare the same or different, and are independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, or a substituted or unsubstituted C1 to C30 alkoxy group.

Binder composition for rechargeable lithium battery, preparing method of same, and rechargeable lithium battery including binder composition

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 binder composition for a rechargeable lithium battery includes a semi-interpenetrating polymer network (semi-IPN) including a copolymer including a repeating unit represented by the following Chemical Formula 1 and a repeating unit represented by the following Chemical Formula 2, and polyacrylamide.  In Chemical Formula 1, Rand Rare the same or different and are independently selected from hydrogen, or a substituted or unsubstituted C1 to C10 alkyl group, and Rand Rare an alkali metal. In Chemical Formula 2, Rto Rare the same or different, and are independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, or a substituted or unsubstituted C1 to C30 alkoxy group.

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.

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

Provided are a phosphor paste composition, a flat display device including the same, and a method of manufacturing the flat display device. The phosphor paste composition contains a phosphor with at least a heat-resistant material selected from a Group II atom-containing material, a Group III atom-containing material, and a Group IV atom-containing material, a binder, and an organic solvent. By using the phosphor paste composition, the deterioration of the phosphor can be prevented during a heat treating process. The flat display device includes a phosphor layer containing the phosphor coated with the heat-resistant material such that lifetime of the flat display device is increased and a permanent residual image phenomenon, the adsorption of water by the phosphor, and the like can be prevented.

Flat display device, plasma device panel and field emission containing phosphor coated with a heat-resistant material

Provided is a green phosphor for a plasma display panel (PDP), represented by the formula: BaMgAlO:Mn where&#x3c;x &#x3c;, and&#x3c;y &#x3c;. A phosphor layer can be prepared using BaMgAlO:Mn alone, which is a green phosphor used in a plasma display panel, or using a mixture of BaMgAlO:Mn and ZnSiO:Mn, and a plasma display panel including the phosphor layer formed of the green phosphor has improved luminance maintenance rate and color purity.

Growing community of inventors

Yongin-si, South Korea

Seung-Uk Kwon