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公开(公告)号：KR100329118B1
公开(公告)日：2002-11-22
申请号：KR1019980042393
申请日：1998-10-10
Applicant: 한국과학기술원
IPC: C25B1/18
Abstract: 본 발명은 합금원소 치환에 의해 전극 표면을 개량한 고용량 마그네슘계 합금(Mg-based alloy)의 전극수명 향상방법에 관한 것이다. 보다 상세하게는 니켈/수소 저장합금(Ni/MH: Mg-based hydrogen storage alloy) 2차 전지용 음극재료의 하나로 수소저장용량이 636mAh/g로서 기존 합금들 보다 크지만 알칼리성 수용액 내에서 전극의 충/방전시 수명(cycle life) 특성이 나쁜 마그네슘함유 합금의 수명을 향상시키는 방법에 관한 것이다.
Mg-Ni계 수소저장합금의 전극용 재료에 있어서 합금 제조시에 passive oxide film을 잘 생성시키는 원소인 Ti, Zr 등의 비정질 합금을 사용하여 Mg
1.0-xy Ti
x Zr
y Ni
1.0 (x=0.01∼0.3, y=0.01∼0.2)과 같은 조성으로 기계적 합금화하였다. 따라서 본 발명의 전극은 전해질내에서 퇴화가 급속히 발생하는 Mg-Ni 합금의 수명을 크게 향상시킬 수 있는 합금원소 치환에 의한 고용량 마그네슘을 함유한 합금의 전극수명의 향상방법을 제공한다.-
公开(公告)号：KR1020020086156A
公开(公告)日：2002-11-18
申请号：KR1020010025926
申请日：2001-05-11
Applicant: 한국과학기술원
IPC: H01M4/60
Abstract: PURPOSE: Provided are an electrode for lithium secondary cell using nickel/sulfur compound as electrode active material of lithium secondary cell, and a method for producing the same. CONSTITUTION: The method for producing an electrode for lithium secondary cell comprises the steps of (i) weighing nickel/sulfur compound as an active material, carbon powder as an electric conductor, an ion conductor, and a binder, and stirring the materials in solvent to form slurry, and (ii) drying the slurry to obtain an anode. The nickel/sulfur compound is at least one of NiS, NiS2, Ni7S6, and Ni3S2. The binder is polyethylene oxide when anode for high temperature is to be produced, or polyvinylidene fluoride when anode for ambient temperature is to be produced.
Abstract translation: 目的：提供使用镍/硫化合物作为锂二次电池的电极活性物质的锂二次电池用电极及其制造方法。 构成：锂二次电池用电极的制造方法包括以下步骤：（i）称量镍/硫化合物作为活性物质，碳粉末作为导电体，离子导体和粘合剂，并在溶剂中搅拌该物质 以形成浆料，和（ii）干燥浆料以获得阳极。 镍/硫化合物是NiS，NiS2，Ni7S6和Ni3S2中的至少一种。 当要生产用于高温的阳极时，粘合剂是聚环氧乙烷，或者当生产用于环境温度的阳极时聚偏二氟乙烯。
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公开(公告)号：KR1020020085715A
公开(公告)日：2002-11-16
申请号：KR1020010025412
申请日：2001-05-10
Applicant: 한국과학기술원
IPC: F25B17/12
Abstract: PURPOSE: A metal hydride heat pump(MHHP) cooling system using waste heat and vacuum pump and method of the same are provided to improve cooling performance of the cooling system. CONSTITUTION: A system includes a low-temperature reaction part(10) using low-temperature reactionary metallic alloy for hydrogen storage storing and discharging hydrogen at relative low temperature; a high-temperature reaction part(20) using high-temperature reactionary metallic alloy for hydrogen storage storing and discharging hydrogen at temperature relatively higher than the low-temperature reaction part; and a vacuum pump(32) making an inside of one of the low-temperature reaction part and the high-temperature reaction part vacuous to forcibly bring hydrogen stored in the other reaction part.
Abstract translation: 目的：提供使用余热和真空泵的金属氢化物热泵（MHHP）冷却系统及其方法，以改善冷却系统的冷却性能。 构成：一个系统包括一个低温反应部分（10），使用低温反应金属合金在相对低的温度下储存和排出氢; 使用高温反应性金属合金在相对高于低温反应部分的温度下储存和排出氢的高温反应部分（20）; 和使真空泵（32）内的低温反应部和高温反应部分的一部分真空地强制地吸入存储在另一个反应部分中的氢。
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公开(公告)号：KR1020020084618A
公开(公告)日：2002-11-09
申请号：KR1020010024057
申请日：2001-05-03
Applicant: 한국과학기술원
IPC: H01M4/60
Abstract: PURPOSE: A sulfur electrode for the positive electrode of a lithium secondary battery and its preparation method are provided to improve the lifetime of a positive electrode by employing sulfur as a lubricant. CONSTITUTION: The method comprises the steps of ball-milling sulfur powder as a lubricant and carbon powder and nickel powder as a conductive material for 12 hours or more under the inert atmosphere to mix them; adding the mixture and a binder to a solvent and stirring the solution to prepare slurry; and drying the slurry to prepare a sulfur positive electrode. The content of the sulfur powder is 10-90 wt% and the content of the nickel powder is 10-30 wt% based on the total weight of the sulfur electrode. Preferably the slurry comprises further a lithium salt and the lithium salt is LiCF3SO3. The nickel powder has a particle size of 30 micrometers or less, and preferably 0.1-10 micrometers. The solvent is preferably N-methyl-2-pyrrolidone.
Abstract translation: 目的：提供一种用于锂二次电池正极的硫电极及其制备方法，以通过使用硫作为润滑剂来提高正极寿命。 构成：该方法包括以下步骤：在惰性气氛下将硫粉作为润滑剂和碳粉末和镍粉作为导电材料进行12小时以上的混合; 将混合物和粘合剂加入溶剂中并搅拌该溶液以制备浆料; 并干燥浆料以制备硫正电极。 硫粉的含量为10-90重量％，镍粉的含量为硫电极总重量的10-30重量％。 优选地，浆料还包含锂盐，锂盐是LiCF 3 SO 3。 镍粉末的粒径为30微米以下，优选为0.1〜10微米。 溶剂优选为N-甲基-2-吡咯烷酮。
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公开(公告)号：KR1019990081330A
公开(公告)日：1999-11-15
申请号：KR1019980015197
申请日：1998-04-28
Applicant: 한국과학기술원
IPC: H01M4/46
Abstract: 본 발명은 니켈/수소저장합금(Ni/MH) 2차전지용 음극재료의 하나로 수소저장용량이 기존에 개발된 합금들에 비해 매우 크나 (약 510mAh/g) 알칼리성 수용액 내에서 전극의 충/방전 시 수명(cycle life) 특성이 나쁜 마그네슘 계 (Mg-based) 합금의 수명을 향상시키는 방법에 관한 것으로 제조된 합금의 표면을 Ni, Cu등의 원소들과 혼합한 후 소결(sintering), 기계적분쇄(mechanical grinding)법을 이용하여 개량한 결과 수명이 향상된 니켈/수소저장합금 2차전지용 음극재료를 제공한다.
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Patent Agency Ranking
公开(公告)号：KR100379249B1
公开(公告)日：2003-04-08
申请号：KR1020000050503
申请日：2000-08-29
Applicant: 한국과학기술원
IPC: H01M4/04
CPC classification number: H01M10/052 , H01M4/02 , H01M4/04 , H01M4/0402 , H01M4/0416 , H01M4/136 , H01M4/1397 , H01M4/38 , H01M4/622 , H01M4/625 , H01M4/626 , Y10T29/49108
Abstract: 본 발명은 전극 수명이 향상된 리튬이차전지의 양극전극용 유황전극 및 그 제조방법에 관한 것으로, 보다 상세하게는 양극전극의 활물질인 유황에 니켈이 첨가된 유황전극 및 그 제조방법에 관한 것이다.
본 발명의 리튬유황전지의 양극전극용 유황전극은 전기전도체로서 니켈을 첨가하여 제조된 것으로서, 이렇게 제조된 리튬유황 이차전지는 지금까지 개발된 리튬유황 이차전지의 문제점인 전극수명 문제를 해결할 수 있다.Abstract translation: 提供一种用于锂二次电池的硫酸正极，其生命周期得到改善，并且提供了一种制造硫酸正极的方法，其中将镍添加到作为正极的活性材料的硫中。 通过添加作为电导体的镍制造的硫酸正极可以解决关于电极寿命周期的问题。
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公开(公告)号：KR100369445B1
公开(公告)日：2003-01-24
申请号：KR1020000020158
申请日：2000-04-17
Applicant: 한국과학기술원
IPC: H01M4/38
Abstract: 본 발명은 리튬이차전지의 양극전극용 리튬망간계 산화물의 코팅재 및 그의 코팅방법에 관한 것으로 보다 상세하게는 리튬전이금속 산화물을 리튬망간계 산화물 표면에 코팅함으로써 고온전극수명 및 고속방전효율이 향상된 리튬망간계 산화물의 코팅재 및 그 코팅방법에 관한 것이다.
본 발명의 리튬이차전지의 양극전극용 리튬망간계 산화물(LiMn
2-X M
X O
4 : 0 2 , LiNiO
2 , LiNi
1-X Co
X O
2 , LiNi
1-XY Co
X M
Y O
2 , LiCo
1-X M
X O
2 , LiNi
1-X M
X O
2 , LiMn
2-X M
X O
4 : 0Abstract translation: 公开了一种锂二次电池中的正极用锂锰氧化物的表面处理方法，更具体地说，涉及锂锰氧化物的表面被锂过渡金属氧化物覆盖的表面处理方法。 使用包覆的锂锰氧化物作为负极材料的锂二次电池不仅解决了常规锂二次电池在高温下电极寿命和排脂效率方面的问题，而且还替代了常规昂贵的钴酸锂 降低生产成本。
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公开(公告)号：KR1020020084370A
公开(公告)日：2002-11-07
申请号：KR1020010023537
申请日：2001-04-30
Applicant: 한국과학기술원
IPC: H01M4/64
CPC classification number: H01M4/663 , C01P2004/03 , C01P2006/40 , H01M4/622 , H01M4/661 , H01M4/665 , H01M10/345 , H01M2004/027 , Y02E60/124
Abstract: PURPOSE: A negative electrode for a Ni/MH secondary battery, its preparation method and a negative electrode current collector composition are provided, to improve the surface characteristic of an electrode, thereby enhancing the internal pressure, the energy density per unit volume and the high speed discharge efficiency of an electrode. CONSTITUTION: The current collector composition comprises 50 wt% of Cu, 50 wt% or less of carbon black, and 50 wt% or less of filament-shaped nickel powder of high surface area. The negative electrode comprises a hydrogen storing alloy, a binder and the current collector prepared from the current collector composition. Preferably the hydrogen storing alloy is a Zr-based hydrogen storing alloy powder and has a particle size of 400 mesh(38 micrometers or less); and the binder comprises a binder of styrene butadiene rubber and a thickener of hydroxypropylmethyl cellulose.
Abstract translation: 目的：提供Ni / MH二次电池的负极及其制备方法和负极集电体组合物，以改善电极的表面特性，从而提高内部压力，每单位体积的能量密度和高 电极的高速放电效率。 构成：集电体组合物包含50重量％的Cu，50重量％以下的炭黑和50重量％以下的高表面积的长丝状镍粉末。 负极包括由集电器组合物制备的储氢合金，粘合剂和集电体。 优选地，储氢合金是Zr基储氢合金粉末，其粒度为400目（38微米或更小）; 并且粘合剂包含苯乙烯丁二烯橡胶的粘合剂和羟丙基甲基纤维素的增稠剂。
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公开(公告)号：KR1020020074539A
公开(公告)日：2002-10-04
申请号：KR1020010014272
申请日：2001-03-20
Applicant: 한국과학기술원
IPC: F25B17/12
Abstract: PURPOSE: A metal hydride heat pump(MHHP) cooling system using waster heat and compressor and method of the same are provided to improve cooling performance. CONSTITUTION: A system includes a low-temperature reaction part(10) using low-temperature reactionary metal hydride storing and discharging hydrogen at relatively low temperature; a high-temperature reaction part(20) using high-temperature reactionary metal hydride storing and discharging hydrogen at temperature relatively higher than the low-temperature reaction part; and a compressor(32) forcibly delivering hydrogen filled in the low-temperature reaction part and the high-temperature reaction part.
Abstract translation: 目的：提供使用废热和压缩机的金属氢化物热泵（MHHP）冷却系统及其方法，以提高冷却性能。 构成：系统包括使用低温反应性金属氢化物在较低温度下储存和排出氢的低温反应部分（10） 使用高温反应性金属氢化物在相对高于低温反应部分的温度下储存和排出氢的高温反应部分（20）; 以及强制地输送填充在低温反应部和高温反应部中的氢的压缩机（32）。
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公开(公告)号：KR1020020010843A
公开(公告)日：2002-02-06
申请号：KR1020000044367
申请日：2000-07-31
Applicant: 한국과학기술원
IPC: H01M4/02
Abstract: PURPOSE: Provided is a method for coating a high crystalline carbon material used for a cathode active material of a lithium ion secondary battery with a carbon material having excellent surface-characteristics, thereby the lithium ion secondary battery has high energy density and high performance. CONSTITUTION: The high crystalline carbon material is coated with a pyrolytic carbon by performing the heat-decomposition of hydrocarbon gas by a tumbling chemical vapor deposition method, wherein the high crystalline carbon material is one selected from the group consisting of natural graphite, Kish graphite, SFG series, highly oriented pyrolytic graphite, mesophase pitch based carbon fiber(MPCF), and MCMB series and the hydrocarbon gas is one selected from the group consisting of LPG, methane, butane, and benzene.
Abstract translation: 目的：提供一种用具有优异表面特性的碳材料涂覆锂离子二次电池用正极活性物质的高结晶性碳材料的方法，锂离子二次电池具有高能量密度和高性能。 构成：高结晶碳材料通过转动化学气相沉积法进行碳氢化合物气体的热分解而涂覆有热解碳，其中高结晶碳材料选自天然石墨，石灰石， SFG系列，高取向热解石墨，中间相沥青基碳纤维（MPCF）和MCMB系列，烃类气体选自LPG，甲烷，丁烷和苯。
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