Abstract:
PURPOSE: A method for fabricating a flexible dye-sensitized solar cell is provided to remarkably improve photo conversion efficiency as compared with a conventional low temperature solar cell by forming nanocrystalline oxide layer on a conductive polymer plate and by reducing a platinum ion solution so as to form a platinum layer. CONSTITUTION: Nanocrystalline transition metal oxide as a solute, 2-propanol as a solvent, acetic acid and distilled water are mixed to make a nanocrystalline oxide colloid solution(100). The nanocrystalline oxide colloid solution is applied to the surface of a bendable conductive substrate(110). The solvent is removed from the substrate having the nanocrystalline oxide colloid solution to form a nanocrystalline oxide layer(120). Dye molecules are absorbed to the nanocrystalline oxide layer to form a semiconductor electrode(130).
Abstract:
PURPOSE: A positive electrode composition containing a poly(aminothiophenol) derivative, a nonaqueous secondary battery obtained from the composition and their preparation methods are provided, to allow a positive electrode composition to be produced massively with a low cost and to improve the capacity characteristic of a nonaqueous secondary battery remarkably and the cycle stability in charge/discharge. CONSTITUTION: The positive electrode composition comprises an active material comprising the doped poly(aminothiophenol) derivative having the repeating unit represented by the formula; a conductive agent; and a binder, wherein X is H, Li, Na or K; Y is F, Cl, Br, I, ClO4, PF6, BF4, CF3SO3, HSO4 or C12H25C6H4SO3; k, k' and k'' are 0.01-0.5; m is 0-0.99; and n is 5-50,000. Preferably the conductive agent is an amorphous carbon; and the binder is at least one selected from the group consisting of poly(tetrafluoroethylene), a copolymer of vinylidene fluoride and hexafluoropropylene, poly(vinylidene fluoride), and a copolymer of vinylidene fluoride and tetrafluoroethylene.
Abstract:
PURPOSE: A polymer electrolyte based on a cationic polymer blend and its preparation method are provided, to improve the ion conductivity and the cation yield characteristic of the polymer electrolyte for a nonaqueous secondary battery. CONSTITUTION: The method comprises the steps of (10) blending a polymer containing an acrylonitrile repeating unit and a cationic polymer to prepare a polymer blend; (20) dissolving the polymer blend and an inorganic material to a co-solvent to prepare a polymer blend solution; (30) forming a porous polymer film from the polymer blend solution by phase transition method; and (40) soaking the porous polymer film into an electrolyte solution where a lithium salt is dissolved. Preferably the inorganic material is selected from the group consisting of silica, talc, alumina, γ-LiAlO2, TiO2, zeolite and their mixture; and the co-solvent is selected from the group consisting of dimethyl formaldehyde, dimethyl sulfoxide, N-methyl pyrrolidone and their mixture.
Abstract:
PURPOSE: Provided is a non-aqueous polymer electrolyte for a secondary battery, which can improve impregnation and maintenance properties of electrolyte solution, a yield of cations, and ionic conductivity. CONSTITUTION: The polymer electrolyte is produced by a process comprising the steps of: (10) dissolving a polymer containing an acrylonitrile repeating unit and an inorganic material in a cosolvent to prepare an acrylonitrile polymer solution, wherein the polymer containing the acrylonitrile repeating unit is one selected from the group consisting of polyacrylonitrile, copolymer of acrylonitrile and butadiene, copolymer of acrylonitrile and methacrylonitrile, terpolymer of acrylonitrile, butadiene and acrylic acid, and etc.; (20) forming a porous polymer film from the acrylonitrile polymer solution by a phase-conversion method; (30) soaking the porous polymer film in an electrolyte having a lithium salt and a cationic organic additive.
Abstract:
본 발명은 진공밀폐형 플렉서블 필름 일차전지 및 그의 제조방법에 관한 것으로, 상기 진공밀폐형 플렉서블 필름 일차전지는 표면 처리된 파우치 내면에 전도성 카본층이 코팅된 양극 집전체 및 상기 전도성 카본층 상에 형성된 양극층을 포함한 양극 극판; 표면 처리된 파우치 내면에 전도성 카본층이 코팅된 음극 집전체 및 상기 전도성 카본층 상에 형성된 음극층을 포함한 음극 극판; 및 상기 양극 극판과 상기 음극 극판 사이에 접착/후주입형 고분자 전해질막을 포함하는 전지조립체를 포함하고, 여기서 상기 전지조립체는 완전밀폐되어 있는 것이다. 본 발명에 따른 플렉서블 필름 일차전지는 파우치를 집전체 필름으로 사용함에 따라 유연성을 개선시키고, 파우치가 전지를 완전밀폐시킬 수 있어 보존기간 및 셀성능을 개선시킬 수 있다. 또한, 필름 일차전지는 스크린프린팅 방식을 이용하여 제조될 수 있어 롤투롤(roll-to-roll) 방식의 연속 공정화가 매우 용이하다. 파우치, 비금속단자, 필름 일차전지, 진공밀폐
Abstract:
폴딩 구조의 필름형 리튬 일차전지 및 그 제조 방법에 관하여 개시한다. 본 발명에 따른 필름형 리튬 일차전지는 제1 집전체와 제2 집전체와 이들 사이에 형성된 고분자 전해질층을 포함한다. 제1 집전체는 제1 전극 탭이 형성되어 있고 일측면에만 제1 전극판이 형성되어 있고 제1 전극판의 일부인 제1 부분 및 제2 부분이 내부 공간을 사이에 두고 상호 대향하도록 절곡되어 있는 폴딩 구조를 가진다. 제2 집전체는 제2 전극 탭이 형성되어 있고 양측면에 각각 제2 전극판이 형성되어 있고 제2 전극판이 제1 전극판의 제1 부분 및 제2 부분에 각각 대향하도록 제1 집전체의 내부 공간 내에 위치되어 있다.
Abstract:
PURPOSE: A cell structure of band meta materials is provided to control a frequency band of negative permeability by changing a gap structure of a split ring resonator into an interdigital structure. CONSTITUTION: A first conductive unit(12-1) is arranged on the upper side of a dielectric substrate(11). A second conductive unit(12-2) is extended in a direction which is different from a longitudinal direction of the first conductive unit. A third conductive unit(12-3) is extended in a direction which faces the first conductive unit. A fourth conductive unit(12-4) and a fifth conductive unit(12-5) are separately extended to the third conductive unit. A sixth conductive unit(12-6) and a seventh conductive unit(12-7) are separately extended to the first conductive unit.
Abstract:
PURPOSE: A nanobloom-shaped positive electrode active material for 3V class lithium battery and a manufacturing method thereof are provided to simplify synthesis and manufacturing process and to mass produce. CONSTITUTION: A nanobloom-shaped positive electrode active material for 3V class lithium battery includes 70-95 weight% of beta phase manganese dioxide as an anodic active material. A manufacturing method of the positive electrode active material comprises the following steps: synthesizing beta phase manganese dioxide by using MnSO4 and NH4 at 120-200 deg. Celsius for 12-24 hours; and cooling, washing, and drying the beta phase manganese dioxide.
Abstract:
PURPOSE: A lithium secondary battery is provided to control normal voltage and operation voltage according to use, to control voltage pattern at charging/discharging, and to easily charge under charging environment due to an energy harvest device. CONSTITUTION: A lithium secondary battery(100) comprises: a positive electrode plate(120) comprising a positive electrode current collector layer(122), and a positive electrode layer(124); a negative electrode plate(130), which is separated from the positive electrode plate, comprising a negative electrode current collecting layer(132), and a negative electrode layer(134); and a polymeric electrolyte(140) inserted between the positive electrode plate and a negative electrode plate. At least one of the positive electrode layer and the negative electrode layer comprises mixed positive electrode active material, or mixed negative electrode active material. The polymeric electrolyte comprises organic electrolyte containing polymer matrix, inorganic additive, and salt.