摘要:
Disclosed is a method for preparing a lithium-metal composite oxide, the method comprising the steps of: (a) mixing an aqueous solution of one or more transition metal-containing precursor compounds with an alkalifying agent and a lithium precursor compound to precipitate hydroxides of the transition metals; (b) mixing the mixture of step (a) with water under supercritical or subcritical conditions to synthesize a lithium-metal composite oxide, and drying the lithium-metal composite oxide; and (c) subjecting the dried lithium-metal composite oxide either to calcination or to granulation and then calcination. Also disclosed are an electrode comprising the lithium-metal composite oxide, and an electrochemical device comprising the electrode. In the disclosed invention, a lithium-metal composite oxide synthesized based on the prior supercritical hydrothermal synthesis method is subjected either to calcination or to granulation and then calcination. Thus, unlike the prior dry calcination method or wet precipitation method, a uniform solid solution can be formed and the ordering of metals in the composite oxide can be improved. Accordingly, the lithium-metal composite oxide can show crystal stability and excellent electrochemical properties.
摘要:
A thin film transistor including: an active layer formed on a substrate; a gate insulating layer pattern formed on a predetermined region of the active layer; a gate electrode formed on a predetermined region of the gate insulating layer pattern; an etching preventing layer pattern covering the gate insulating layer pattern and the gate electrode; and a source member and a drain member formed on the active layer and the etching preventing layer pattern.
摘要:
The present invention provides a method for preparing spherical carbon comprising step of heat-treating a mixture of a carbon precursor and dispersion media, a spherical non-graphitizable carbon using the same, and a method for preparing spherical artificial graphite.
摘要:
The present invention relates to lithium manganese complex oxide with a spinel structure used as an active material of a lithium or lithium ion secondary battery. Specifically, the present invention relates to a process for preparing lithium manganese complex oxide having improved cyclic performance at a high temperature above room temperature, and a lithium or lithium ion secondary battery using the oxide prepared according to said process as a cathode active material.
摘要:
A semiconductor device having an analog capacitor and a method of fabricating the same are disclosed. The semiconductor device includes a bottom plate electrode disposed at a predetermined region of a semiconductor substrate, and an upper plate electrode having a region overlapped with the bottom plate electrode thereon. The upper plate electrode and the bottom plate electrode are formed of a metal compound. A capacitor dielectric layer is interposed between the bottom plate electrode and the upper plate electrode. A bottom electrode plug and an upper electrode plug are connected to the bottom plate electrode and the upper plate electrode through the interlayer dielectric layer.
摘要:
A method for fabricating a MIM capacitor of a MDL logic or analog circuit of a semiconductor device. A conductivity layer is formed on a semiconductor substrate having a first inter-level insulating layer. A capping metal layer having an etching rate higher than an oxide layer is formed on the conductivity layer. A lower electrode comprising a “conductivity layer/capping metal layer” deposition is formed by selectively etching the capping metal layer and the conductivity layer in order to expose a predetermined part of the surface of the first inter-level insulating layer. A second inter-level insulating layer is formed on the first inter-level insulating layer covering the lower electrode. A via hole is formed by selectively etching both the second inter-level insulating layer and the lower electrode thereby to expose a portion of the lower electrode so that a tapered capping metal layer remains along the lower edges of the via hole. A dielectric layer, devoid of step coverage defects and concentrated electric fields, is inserted in the via hole between the lower and upper electrodes thereby preventing current leakage and short circuits at portions of the dielectric layer. This has the beneficial effect of substantially improving product yield and reliability.
摘要:
A method for forming an integrated circuit device includes the steps of forming a first capacitor electrode on a substrate and forming a first wiring electrode on the substrate. An insulating layer is formed on the first capacitor electrode and on the first wiring electrode opposite the substrate. A second capacitor electrode is formed on a portion of the insulating layer opposite the first capacitor electrode. A contact hole is formed in the insulating layer exposing a portion of the first wiring electrode. A second wiring electrode is then formed on the exposed portion of the wiring electrode, after forming the second capacitor electrode. Related structures are also discussed.
摘要:
In a semiconductor device and a method of fabricating the same, a fuse and a capacitor are formed at a same level on a semiconductor substrate having a fuse area and a capacitor area. The fuse is placed on the fuse area, and a lower plate is placed on the capacitor area. The lower plate is located on a same plane as the fuse. Further, an upper plate is located above the lower plate, and a capping layer is interposed between the lower plate and the upper plate. Therefore, the fuse and the capacitor can be formed at the same time, thereby minimizing photolithography and etch process steps.
摘要:
The present invention relates to a method for preparing a lithium manganese complex oxide Li1+xMn2−xO4 (0≦x≦0.12) used as a cathode active material of a lithium or lithium ion secondary battery.The present invention provides a method for preparing a manganese compound comprising the step of simultaneously applying a mechanical force and heat energy to a manganese compound to remove defects present in particles of the manganese compound and to control the aggregation of particles and the shape of the aggregated particles, a method for preparing a lithium manganese complex oxide with a spinel structure using the manganese compound prepared by the above method as a raw material, and a lithium or lithium ion secondary battery using the lithium manganese complex oxide with a spinel structure prepared by the above method as a cathode active material.A lithium or lithium ion secondary battery using the lithium manganese complex oxide with a spinel structure prepared from the manganese compound without defects inside particles as a cathode active material has excellent charge/discharge characteristics and cyclic performance.
摘要翻译:本发明涉及一种锂锰复合氧化物Li 1 + x 2 O 2-x O 4(0≤x≤0.4)的制备方法, <= 0.12)用作锂或锂离子二次电池的正极活性物质。 本发明提供一种锰化合物的制备方法,包括同时向锰化合物施加机械力和热能以除去锰化合物颗粒中存在的缺陷并控制颗粒的聚集和聚集的形状的步骤 颗粒,使用通过上述方法制备的锰化合物作为原料制备具有尖晶石结构的锂锰复合氧化物的方法,以及使用具有尖晶石结构的锂锰复合氧化物的锂或锂离子二次电池,其由尖晶石结构 作为阴极活性物质。 使用由锰化合物制备的具有尖晶石结构的锂锰复合氧化物的锂或锂离子二次电池在颗粒内没有缺陷作为正极活性材料具有优异的充电/放电特性和循环性能。
摘要:
A semiconductor device having an analog capacitor and a method of fabricating the same are disclosed. The semiconductor device includes a bottom plate electrode disposed at a predetermined region of a semiconductor substrate, and an upper plate electrode having a region overlapped with the bottom plate electrode thereon. The upper plate electrode and the bottom plate electrode are formed of a metal compound. A capacitor dielectric layer is interposed between the bottom plate electrode and the upper plate electrode. A bottom electrode plug and an upper electrode plug are connected to the bottom plate electrode and the upper plate electrode through the interlayer dielectric layer.