Samsung Sdi Co., Inc.

Yury Matulevich

Jae-Hyuk Kim

Chang-Ui Jeong

Jong-Seo Choi

Soon-Sung Suh

Hee-Young Chu

Sung-Hwan Moon

Seung-Uk Kwon

Yo-Han Park

Chun-Gyoo Lee

Myung-Hwan Jeong

Young-Ugk Kim

Duk-Hyoung Yoon

Mi-Hyun Lee

Jaehyuk Kim

Suk-Ki Kim

Chang-Hyuk Kim

Dong-Hyun Kang

Min-Suk Lee

Changui Jeong

Chungyoo Lee

Sungwan Moon

Seunguh Kwon

Yohan Park

Jongseo Choi

Sunghwan Moon

An electrode active material for a lithium secondary battery, a method of preparing the electrode active material, an electrode for a lithium secondary battery which includes the same, a lithium secondary battery using the electrode. The electrode active material includes a core active material and a coating layer including magnesium aluminum oxide (MgAlO) and formed on the core active material. 1s binding energy peaks of oxygen (O) in the electrode active material measured by x-ray photoelectron spectroscopy (XPS) are shown at positions corresponding to 529.4&#xb1;0.5 eV, about 530.7 eV, and 531.9&#xb1;0.5 eV, and a peak intensity at the position corresponding to 529.4&#xb1;0.5 eV is stronger than a peak intensity at the position corresponding to about 530.7 eV.

Electrode active material for lithium secondary battery, method of preparing the electrode active material, electrode for lithium secondary battery including the same, and lithium secondary battery using 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 electrode active material and a secondary battery including the same are provided. More particularly, the present disclosure relates to a negative electrode active material including a Si-metal alloy including Si, the Si being present in the Si-metal alloy in an amount of 66 at % or less, and at least a portion of the Si being crystalline Si. The negative active material can provide a high-capacity battery, which can retain high capacity due to little volumetric expansion during charging and discharging, thereby demonstrating an excellent life characteristic of the secondary battery. The negative electrode active material may include a Si-metal alloy including crystalline Si having a crystal grain size of 30 nm or less. Methods of preparing a negative electrode active material and methods of preparing a secondary battery including the same are also disclosed.

Negative electrode active material and secondary battery including the same

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

A composite includes a compound selected from the group consisting of a lithium lanthanum zirconium oxide and a lithium lanthanum tantalum oxide; a lanthanum oxide; and an oxide selected from the group consisting of a lanthanum zirconium oxide and a lanthanum tantalum oxide. An electrode active material for a secondary lithium battery may include such composite. Methods of preparing the composite, an electrode for a secondary lithium battery including the electrode active material, and a secondary lithium battery including the electrode are disclosed.

Composite, electrode active material for secondary lithium battery including the composite, method of preparing the composite, anode for secondary lithium battery including the electrode active material, and secondary lithium battery including the anode

An electrode active material including a core active material and a coating layer, including a compound represented as the following Formula 1, on a surface of the core active material, a method of preparing the same, an electrode for a lithium secondary battery which includes the same, and a lithium secondary battery using the electrode.Li-M-N&#x2003;&#x2003;[Formula 1]where, M denotes an alkaline earth metal, a/(a+b+c) is in a range of about 0.10 to about 0.40, b/(a+b+c) is in a range of about 0.20 to about 0.50, and c/(a+b+c) is in a range of about 0.20 to about 0.50.

Electrode active material, method of preparing the same, electrode for lithium secondary battery which includes the same, and lithium secondary battery using the electrode

Provided are a protecting layer for a plasma display panel (PDP), a method of forming the same, and a PDP including the protecting layer. The protecting layer includes a magnesium oxide-containing layer having a surface to which magnesium oxide-containing particles having a magnesium vacancy-impurity center (VIC) are attached. The protecting layer is resistant to plasma ions and has excellent electron emission effects, and thus, a PDP including the protecting layer can be operated at low voltage with high discharge efficiency.

Protecting layer having magnesium oxide particles at its surface, method of preparing the same, and plasma display panel comprising the protecting layer

Disclosed is a material for forming a protective layer, a protective layer employing the material and a PDP with the protective layer. Unlike conventional protective layers which employ MgO created in conditions of pressurized artificial gas, the instant protective layer uses MgO created by heating Mg and allowing it to oxidize naturally in air. The result is MgO with fewer defects that is more effective as a protective layer in many uses, such as in a PDP. The instant MgO also shows many specific spectral characteristics and contains impurities in amounts of less than about 2 ppm each. Also disclosed is a PDP which takes advantage of the advantages of the inventive protective layer.

Growing community of inventors

Yongin-si, South Korea

Yury Matulevich