Abstract:
본 발명은 양극활물질 및/또는 도전재 및/또는 결합제를 포함하는 통상의 리튬이차전지용 양극을 기저층으로 갖고, 상기 기저층 상에 피복된 도전재 및 결합제를 포함하고, 그 중량비가 10 - 100 배인 도전층을 포함하는 리튬이차전지용 양극, 그 제조방법 및 이를 포함하는 리튬이차전지를 제공한다. 본 발명의 제조방법은 양극활물질 및/또는 도전재 및/또는 결합제를 포함하고, 집전체 상에 코팅, 건조 및 압연된 리튬이차전지용 양극 상에 도전재의 성분이 강화된 도전성 슬러리를 코팅, 건조 및 압연시키는 첫번째 방법과, 양극활물질 및/또는 도전재 및/또는 결합제를 포함하는 혼합물을 집전체 상에 코팅시키고, 그 위에 도전재 성분이 강화된 도전성 슬러리를 코팅시킨 후, 건조 및 압연시키는 두번째 방법이 있다. 도전성 슬러리로 표면처리된 본 발명의 양극에 의해 전극의 전위분포 및 계면 특성이 향상되었고, 이것에 의해 리튬이차전지의 용량, 고율 충방전특성 및 수명특성이 크게 향상되었다. 따라서, 도전성 슬러리로 표면처리된 본 발명의 양극을 포함하는 리튬이차전지는 각종 소형 전자기기, 통신기기 및 전기자동차의 전원용 등 다양한 산업분야에 응용될 수 있다.
Abstract:
PURPOSE: A metal oxide electrode coated with porous metal, metal oxide or carbon thin film, its preparation method and a lithium secondary battery using the electrode are provided, to improve the capacity of a battery, the efficiency of charging/discharging and the lifetime. CONSTITUTION: The metal oxide electrode is such that it is coated with a thin film comprising porous metal, porous metal oxide or porous carbon by the thickness of several Angstrom to several micrometers. The method comprises the steps of placing a metal oxide electrode roll in a vacuum chamber; evaporating metal, metal oxide or carbon to coat the electrode with porous metal, porous metal oxide or porous carbon with unwinding the electrode from the roll at regular speed and winding it to another roll; and placing the electrode at a specific temperature under vacuum to stabilize the electrode. Preferably the porous metal is selected from the group consisting of Li, Al, Sn, Bi, Si, Sb, Ni, Cu, Ti, V, Cr, Mn, Fe, Co, Zn, Mo, W, Ag, Au, Pt. Ir, Ru or their alloys; and the metal oxide electrode comprises an active material which is prepared by using LiCoO2, LiMn2O4, LiNiO2, V6O13 or V2O5.
Abstract translation:目的:提供涂覆有多孔金属,金属氧化物或碳薄膜的金属氧化物电极,其制备方法和使用该电极的锂二次电池,以提高电池的容量,充电/放电的效率和使用寿命。 构成:金属氧化物电极使其涂覆有包括多孔金属,多孔金属氧化物或多孔碳的薄膜,厚度为几埃至几微米。 该方法包括将金属氧化物电极辊放置在真空室中的步骤; 蒸发金属,金属氧化物或碳,以多孔金属,多孔金属氧化物或多孔碳涂覆电极,以规则的速度将电极从辊中退绕并将其卷绕到另一个辊上; 并将电极置于特定温度的真空下以使电极稳定。 优选多孔金属选自Li,Al,Sn,Bi,Si,Sb,Ni,Cu,Ti,V,Cr,Mn,Fe,Co,Zn,Mo,W,Ag,Au,Pt 。 Ir,Ru或它们的合金; 并且金属氧化物电极包含通过使用LiCoO 2,LiMn 2 O 4,LiNiO 2,V 6 O 13或V 2 O 5制备的活性材料。
Abstract:
PURPOSE: A method for electrochemically synthesizing para-aminophenol from nitrobenzene without organic solvent or surfactant by using a single flat or arc type electrode or a plurality of flat or arc type electrodes as working electrodes and using an agitator is provided. CONSTITUTION: In electrolytically synthesizing para-aminophenol from nitrobenzene, the electrochemical synthesis method of para-aminophenol is characterized in that electrolytic synthesis of para-aminophenol is performed from a cathode compartment solution having 1.0 to 4.0 M concentration of sulfuric acid and 0.5 to 2.0 M concentration of nitrobenzene by using a single flat or arc type electrode or a plurality of flat or arc type electrodes as working electrodes and using an agitator, wherein a material of the working electrodes is graphite, lead, lead-silver alloy or copper, and the material is coated with a single metal or alloy thereof selected from the group consisting of copper, bismuth, tin, antimony, lead and zinc, and wherein the cathode compartment solution further comprises a metal compound containing a metal selected from the group consisting of copper, bismuth, tin, antimony, lead and zinc. The electrochemical synthesizing apparatus of para-aminophenol comprises anode compartment comprising counter electrodes (2), cathode compartment comprising working electrodes (3), and cation exchange membranes (4), wherein the working electrodes are consisted of a single flat or arc type electrode or a plurality of flat or arc type electrodes, and the apparatus further comprises an agitator.