Abstract:
본 발명은 셀룰러 폰에 사용되는 리튬 이차 전지용 양극 활물질에 관한 것으로, LiCoO 2 와 이의 대체 양극 활물질로 연구되고 있는 LiMn 2 O 4 , Li(Ni,Co)O 2 및 V 계열 산화물과는 다른 고용량 및 장수명의 특징을 갖는 리튬 이차 전지용 양극 활물질 및 그 제조 방법을 제공한다. PO 4 3- , SO 4 2- 그리고 OH - 음이온기를 포함하는 광물인 디아도카이트[Diadochite, Fe 2 (PO 4 )(SO 4 )(OH)·6H 2 O]를 열 혹은 화학적 처리하여 하기 화학식 1의 리튬 이차 전지용 양극 활물질을 제조한다.
Li a Fe b M c (PO 4 ) x (SO 4 ) y (OH) z
상기 식에서 M은 Mg, Ti, Cr, Mn, Co, Ni, Cu, Zn, Al, Si으로 이루어진 군에서 선택되는 하나 이상의 원소이고, 0 ≤ a, c ≤ 0.5, 1.5 ≤ b ≤ 2, 0.5 ≤ x, y, z ≤ 1.5 이다.
Abstract:
PURPOSE: A positive electrode active material for a lithium secondary battery and its preparation method are provided, to obtain an active material having high capacity and long lifetime. CONSTITUTION: The positive electrode active material contains diadochite represented by Fe2(PO4)(SO4)(OH) or Fe2(PO4)(SO4)(OH)·6H2O. The positive electrode active material is represented by LiaFebMc(PO4)x(SO4)y(OH)z, wherein M is at least one element selected from the group consisting of Mg, Ti, Cr, Mn, Co, Ni, Cu, Zn, Al and Si; 0
Abstract:
PURPOSE: Provided are a power supply device capable of charging a thin film secondary battery remotely, which can minimize the area of an energy supply system and maximize the integration of the system, and a micro-apparatus containing the power supply device. CONSTITUTION: The micro-apparatus comprises: the remote power supply device(200) containing a micro strip antenna(21) to receive electromagnetic waves, a diode to rectify the voltage generated from the received electromagnetic waves, and a filter(23) to remove high frequency from the voltage; a thin film secondary battery(100), which is charged by receiving the voltage from the remote power supply device(200); an IC chip to treat signals by receiving power from the thin film secondary battery(100).
Abstract:
PURPOSE: A nanoparticle oxide solar cell, its preparation method, a solar cell module using the solar cell and a transparent electric window are provided, to minimize the space between solar cells of the module for minimizing the loss of power and maximizing the contact between cells. CONSTITUTION: The nanoparticle oxide solar cell comprises a primary conductive plate(21) where a negative electrode(22) region is formed in one side; a secondary conductive plate(21') where a positive electrode(23) region is formed in the other side; a binding/sealing means which binds the primary and secondary conductive plates so that a primary and secondary conductive plates face each other and the two regions where the positive or negative electrode is not formed are not overlapped, and seals the regions where the positive electrode and the negative electrode face each other; a primary conductive adhesive(28a) which is formed in the unoverlapped region of the primary conductive plate; and a secondary conductive adhesive(28b) which is formed in the unoverlapped region of the secondary conductive plate. Preferably the sealed region formed by the binding/sealing means contains an electrolyte.
Abstract:
본 발명은 리튬이 도핑된 폴리아닐린 분말 형성 방법과 그를 이용한 전극활물질 및 슈퍼 캐페시터 제조 방법에 관한 것으로서, 비전도성 폴리아닐린 분말과 리튬염 용액을 혼합하여 비전도성 폴리아닐린 분말을 리튬염으로 도핑시키고, 리튬염 용액으로부터 리튬염으로 도핑된 폴리아닐린 분말을 분리시킴으로써 리튬염으로 도핑된 폴리아닐린 분말을 형성하고, 그를 이용하여 전극활물질 및 슈퍼 캐페시터를 제조하는데 특징이 있다.
Abstract:
PURPOSE: A power supply element for self-charging high-rate charging/discharging is provided to make a power supply element act as an efficient energy source by operating a lithium secondary cell charged through a solar cell and a superhigh capacitor selectively. CONSTITUTION: A superhigh capacitor(2) which is charged through a solar cell(3) performs a high rate of discharge. A lithium secondary cell(1) which is able to be recharged and charged through the solar cell(3) performs a low rate of discharge. A logic switch(4) is connected with the solar cell(3) in case of charging and is separated from the solar cell(3) in case of discharging.
Abstract:
PURPOSE: An organic-inorganic composite oxide for the cathode of a lithium secondary battery and its preparation method are provided, which is improved in the charging-discharging effect by intercalating different polymers into V2O5 xerogel. CONSTITUTION: The organic-inorganic composite oxide comprises V2O5 xerogel where poly(2,5-dimercapto-1,3,4-thiadiazole) and polyaniline are intercalated. Preferably the ratio of V2O5 xerogel : poly(2,5-dimercapto-1,3,4-thiadiazole) : polyaniline is 1 : 0.2-1 : 0.2-2 by mol. The method comprises the steps of preparing powdered V2O5 xerogel; dissolving the powdered V2O5 xerogel into distilled water to obtain a V2O5 aqueous solution; dissolving 2,5-dimercapto-1,3,4-thiadiazole monomer into an organic solvent to obtain a 2,5-dimercapto-1,3,4-thiadiazole solution; adding the V2O5 aqueous solution to the 2,5-dimercapto-1,3,4-thiadiazole solution slowly; adding aniline to the obtained one; stirring the obtained one at a room temperature for 24 hours, filtering it under reduced pressure and washing it; and drying the product at a room temperature or 80 deg.C.
Abstract:
PURPOSE: A smart card embedding a super capacitor is provided to enable a rapid charge or an instant discharge at a remote place as well as by a wired connection by using the super capacitor for supplying electric power to a signal process circuit so that it can make only the card itself perform a data process. CONSTITUTION: The smart card comprises a super capacitor(SC), an antenna coil(A), a low pass filter(F), external connectors(11,12), a diode and an IC element(IC). Electromagnetic waves are received by the antenna coil(A), rectified in the diode, transferred to the low pass filter(F), filtered in the low pass filter(F), and converted to DC voltage signals. The DC voltage signals charge the super capacitor(SC). The super capacitor(SC) can be charged also via the external connectors(11,12). The super capacitor(SC) supplies necessary power to the IC elements for processing data or generating signals to external devices. The super capacitor has a specific capacity larger than a conventional capacitor by 100 to 1000, and a power density larger than the latest secondary battery by 10 more so that it can rapidly store the electric power.
Abstract:
본 발명은 한정된 용적에서 전지의 용량을 증가시키고 편극화와 단락의 위험을 줄임으로써 종래의 전지보다 우수한 특성을 지닌 리튬 폴리머 2차전지 멀티셀과, 그것의 개선된 제조방법에 관한 것이다. 본 발명에 따른, 리튬 폴리머 2차전지 멀티셀은, (음전극/고분자 전해막/양전극) 또는 (양전극/고분자 전해막/음전극)으로 구성된 복수개의 단위셀이 직렬로 적충되거나 또는 병렬로 연결되며, 상기한 양전극 및 음전극을 구성하는 집전체가 동일한 전극끼리 한 방향으로 모이도록 하여 일체로 구성된 것을 특징으로 한다. 또한, 본 발명에 따른, 리튬 폴리머 2차전지 멀티셀의 제조방법은, 음극 집전체(1,1')상에 음전극 물질(2)의 슬러리를 도포하고 건조시켜 음전극을 형성하는 단계와, 양극 집전체(4,4') 상에 양전극 물질(5)의 슬러리를 도포하고 건조시켜 양전극을 형성하는 단계와, 고분자 전해액을 박판 상에 캐스팅하고 박판으로부터 분리시켜 고분자 전해막(3)을 형성하는 단계와, 상기 단계에서 얻어진 양전극, 음전극 및 고분자 전해막(3)을 (음전극/고분자 전해막/양전극) 또는 (양전극/고분자 전해막/음전극)의 순서로 배열하고 접합하여 단위셀을 제조하는 단계와, 상기한 복수개의 단위셀을 직렬로 적층하거나 또는 병렬로 연결하고, 상기한 양전극 및 음전극을 구성하는 집전체(1,1' 또는 4,4')가 동일한 전극끼리 한 방향으로 모이도록 하여 인접한 전극을 일체로 구성� �는 단계를 포함한다.