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公开(公告)号：KR100979099B1
公开(公告)日：2010-08-31
申请号：KR1020080000203
申请日：2008-01-02
Applicant: 한국전기연구원 , 주식회사 엘 앤 에프
Abstract: 본 발명은 실리콘 산화물 및 주석 산화물 중 적어도 하나가 포함된 비탄소계 화합물을 포함하는 음극 활물질, 결합제 및 도전재를 포함하여 이루어져 초기쿨롱효율이 90% 이상인 음극, LiCoO
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양극 활물질을 포함하는 양극 및 이온전도체를 구비한 리튬이차전지로서, 초기 쿨롱 효율을 90% 이상으로 향상되고 고용량 특성을 나타내는 고전압, 고효율, 고에너지 리튬이차전지를 제공한다.
리튬 이차 전지, 고효율화, 장수명, 산화실리콘과 흑연 복합체-
公开(公告)号：KR1020090034045A
公开(公告)日：2009-04-07
申请号：KR1020070099190
申请日：2007-10-02
Applicant: 한국전기연구원 , 에스케이머티리얼즈 주식회사
IPC: H01M4/133 , H01M4/1393 , H01M10/0525 , H01M10/02
CPC classification number: H01M4/362 , H01M4/366 , H01M4/622 , H01M4/624 , H01M10/0525 , Y02E60/122
Abstract: A negative electrode for a lithium ion secondary battery is provided to show high initial coulombic efficiency and high specific capacity property, and stable cycle characteristics, thereby improving the energy storage capacity and life span of a lithium secondary battery. A negative electrode for a lithium ion secondary battery comprises a carbon-coated non-carbonaceous compound-graphite composite negative electrode active material, binder and conductive material. The initial coulombic efficiency is 90% or greater. The non-carbonaceous compound is at least one selected from silicon oxide and tin oxide. The carbon-coated non-carbonaceous compound-graphite composite is obtained by mixing a carbon precursor and the non-carbonaceous compound-graphite composite and coating the non-carbonaceous compound-graphite composite with carbon. The carbon precursor is an alkylcarbonate compound or arylcarbonate compound.
Abstract translation: 提供锂离子二次电池的负极，以显示高的初始库仑效率和高比容量特性，并且具有稳定的循环特性，从而提高锂二次电池的储能能力和寿命。 锂离子二次电池用负极包括碳涂覆的非碳质化合物 - 石墨复合负极活性物质，粘合剂和导电材料。 初始库仑效率为90％以上。 非碳质化合物是选自氧化硅和氧化锡中的至少一种。 通过混合碳前体和非碳质化合物 - 石墨复合体并用碳将非碳质化合物 - 石墨复合材料进行涂覆而获得碳涂覆的非碳质化合物 - 石墨复合材料。 碳前体是烷基碳酸酯化合物或芳基碳酸酯化合物。
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公开(公告)号：KR100788257B1
公开(公告)日：2007-12-27
申请号：KR1020070019373
申请日：2007-02-27
Applicant: 한국전기연구원
CPC classification number: H01M4/366 , H01M4/5805 , H01M4/622 , H01M4/625 , H01M4/667 , H01M10/0525 , Y02E60/122
Abstract: A high voltage lithium secondary battery is provided to improve the discharge capacity and cycle characteristics even in case of the high voltage charge process. A high voltage lithium secondary battery comprises a positive electrode which comprises a positive electrode active material, a conductive material, and a binder in a ratio of 90-98 : 1-5 : 1-5 by weight; a negative electrode which comprises a Sn_a Cu_b-graphite composite (wherein a:b is 3:8 to 8:3); and an ion conductor. The positive electrode active material is a LiCoO2 active material formed by coating it with Co3(PO4)2 so as to form a LiCoPO4 thin film on the surface; the conductive material is carbon black (super P black); and the binder is polyvinylidene fluoride.
Abstract translation: 提供高压锂二次电池，以提高放电容量和循环特性，即使在高电压充电过程的情况下也是如此。 高压锂二次电池包括正极，其包含正极活性物质，导电材料和粘合剂，其比例为90-98:1〜5:1〜1-5重量比; 负极，其包含Sn_a Cu_b-石墨复合材料（其中a：b为3:8至8:3）; 和离子导体。 正极活性物质是通过用Co 3（PO 4）2涂覆而形成的LiCoO 2活性物质，以在表面上形成LiCoPO 4薄膜; 导电材料为炭黑（超P黑）; 粘合剂为聚偏二氟乙烯。
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公开(公告)号：KR100537745B1
公开(公告)日：2005-12-19
申请号：KR1020040046055
申请日：2004-06-21
Applicant: 한국전기연구원
IPC: H01M4/58
Abstract: 본 발명에 따른 리튬이차전지용 음극 활물질은, 실리콘, 구리, 주석, 게르마늄, 인듐, 아연, 중의 어느 하나의 금속을 함유하는 금속 질화물에 철, 코발트, 니켈, 구리 중의 어느 하나의 이종 금속이 도핑된다. 이와 같은 리튬이차전지용 음극 활물질의 제조방법은, 미세 입경을 갖는 소정량의 금속 질화물에 이종의 금속 분말을 소정량 첨가하여 균일하게 혼합하는 단계; 상기 혼합분말을 용기 속에 채운 다음 소정의 압력을 가하는 단계; 상기 가압공정에 의해 고체 시료를 획득한 후, 그 시료를 소정 온도에서 소정 시간 동안 1차 열처리하는 단계; 상기 열처리를 거친 고체 시료를 분쇄하여 미세 분말화하는 단계; 및 미세 분말을 소정 온도에서 소정 시간 동안 2차 열처리하여 최종적으로 이종금속이 도핑된 금속 질화물을 얻는 단계를 포함한다.
이와 같은 본 발명에 의하면, 실리콘 질화물에 코발트나 철 등의 금속원소를 도핑함으로써 순수 실리콘 질화물에 비해 초기용량과 가역용량을 향상시킬 수 있는 장점이 있다. 또한, 기존의 리튬 질화물에 비해 대기 중에서 작업이 가능하므로, 작업 능률을 향상시킬 수 있다.-
公开(公告)号：KR1020030092902A
公开(公告)日：2003-12-06
申请号：KR1020020030748
申请日：2002-05-31
Applicant: 한국전기연구원
IPC: H01M4/139
Abstract: PURPOSE: Provided is a method for making an electrode for a lithium secondary battery having a high specific capacity. A lithium secondary battery comprising the electrode is also provided to improve the energy density of the battery. CONSTITUTION: The method comprises the steps of: mixing a multi-walled carbon nano-tube material, a binder and a dispersive medium to form an electrode blend; and coating the electrode blend on a collector and drying the coated collector. The method optionally further comprises the step of compressing the metal thin film of the collector coated with the electrode blend. The lithium secondary battery comprises: an anode(t2) formed of the electrode as defined above; a cathode(t1) comprising a transition metal compound material; a porous separator(t3,t4); and a lithium salt conductive medium.
Abstract translation: 目的：提供具有高比容量的锂二次电池用电极的制造方法。 还提供了包括电极的锂二次电池以提高电池的能量密度。 构成：该方法包括以下步骤：将多壁碳纳米管材料，粘合剂和分散介质混合以形成电极共混物; 并将电极共混物涂覆在收集器上并干燥涂覆的收集器。 该方法可选地进一步包括压缩涂覆有电极共混物的集电体的金属薄膜的步骤。 锂二次电池包括：由如上所定义的电极形成的阳极（t2）; 包含过渡金属化合物材料的阴极（t1） 多孔分离器（t3，t4）; 和锂盐导电介质。
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Patent Agency Ranking26.发明公开리튬 폴리머 2차 전지용 고분자 전해질 제조물 및 그제조물을 이용한 리튬 폴리머 2차 전지의 제조 방법 失效用于锂聚合物二次电池的聚合物电解质产品的制备方法和使用聚合物电解质产品的电池的制备方法
公开(公告)号：KR1020010090406A
公开(公告)日：2001-10-18
申请号：KR1020000015364
申请日：2000-03-25
Applicant: 한국전기연구원
IPC: H01M10/05
CPC classification number: H01M10/0565 , H01M4/139 , H01M10/052 , H01M10/0525 , H01M10/058
Abstract: PURPOSE: A method for preparing the polymer electrolyte product for a lithium polymer secondary polymer and a method for preparing the lithium polymer secondary polymer using the polymer electrolyte product are provided, to prevent the leakage of liquid electrolyte. CONSTITUTION: The preparation method of a polymer electrolyte product comprises the steps of: dissolving poly(vinyl chloride) as a matrix polymer into a first solvent, adding a plasticizer with high boiling point, adding silica whose surface is coated with an organic material, and mixing them; coating the mixture onto a substrate uniformly and drying it to make a polymer electrolyte film that the first solvent is removed; dipping the polymer electrolyte film into a second solvent that the plasticizer with high b.p. is dissolved and the matrix polymer is not dissolved, to remove only the plasticizer, and thereby making a polymer film with many micropores; and dipping the polymer film into a liquid electrolyte containing lithium salts for allowing the liquid electrolyte to soak into the micropores, and thereby obtaining the polymer electrolyte product. Preferably the number mean molecular weight of poly(vinyl chloride) is 10,000-200,000; the particle size of silica is less than 1 micrometer; the organic material is silane; the first solvent is tetrahydrofuran; the plasticizer is dibutyl phthalate or dioctyl phthalate; and the second solvent is methanol or ethyl ether.
Abstract translation: 目的：提供一种制备锂聚合物二次聚合物的聚合物电解质产品的方法和使用该聚合物电解质产品制备该锂聚合物二次聚合物的方法，以防止液体电解质的泄漏。 构成：聚合物电解质产品的制备方法包括以下步骤：将聚（氯乙烯）作为基质聚合物溶解在第一溶剂中，加入高沸点增塑剂，加入表面被有机材料涂覆的二氧化硅，以及 混合它们 将混合物均匀地涂布在基材上并干燥以制备除去第一溶剂的聚合物电解质膜; 将聚合物电解质膜浸入第二溶剂中，使高浓度的增塑剂 溶解并且基质聚合物不溶解，仅除去增塑剂，从而制备具有许多微孔的聚合物膜; 并将聚合物膜浸渍到含有锂盐的液体电解质中，以使液体电解质浸入微孔中，从而获得聚合物电解质产物。 聚（氯乙烯）的数均分子量优选为10,000-200,000; 二氧化硅的粒度小于1微米; 有机材料是硅烷; 第一溶剂是四氢呋喃; 增塑剂是邻苯二甲酸二丁酯或邻苯二甲酸二辛酯; 第二溶剂是甲醇或乙醚。
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公开(公告)号：KR101704598B1
公开(公告)日：2017-02-09
申请号：KR1020130116360
申请日：2013-09-30
Applicant: 한국전기연구원
IPC: H01M4/505 , H01M4/525 , H01M10/052
Abstract: 본발명은리튬이차전지용양극활물질및 이를포함하는리튬이차전지에관한것으로, 층상계 xLiMnOyLiMO(M=하나이상의전이금속, 0.1≤x≤0.5, 0.5≤y≤0.9, x+y=1) 양극활물질조성물을형성시키고, 상기양극활물질조성물을산처리시켜비가역용량을감소시키는리튬이차전지용양극활물질을기술적요지로한다. 그리고본 발명은, 층상계 xLiMnOyLiMO(M=하나이상의전이금속, 0.1≤x≤0.5, 0.5≤y≤0.9, x+y=1) 양극활물질조성물을산처리시켜형성시킨양극활물질조성물과, 도전재, 결합제가혼합되어형성된양극과; 리튬이온의탈삽입이가능한음극활물질을포함하는음극; 및전해질;을포함하는리튬이차전지를기술적요지로한다. 이에따라, 리튬이차전지용양극활물질인 LiMnO-LiMO의초기비가역용량이감소하고, 방전용량, 사이클수명등 전기화학적특성이향상되어저가, 고안전성, 고용량, 장수명이차전지를용이하게제작할수 있어서각종용도에사용가능하다는이점이있다.
Abstract translation: 本发明涉及锂二次电池用正极活性物质和锂二次电池，特别涉及锂二次电池用正极活性物质，其中层叠xLi_2MnO_3··的阴极活性物质的组成 生成并酸化yLiMO 2以降低不可逆容量，其中M =一种或多种过渡金属，0.1≤x≤0.5,0≤y≤0.9，x + y = 1。 根据本发明，锂二次电池包括：阴极，其通过混合层叠的xLi 2 MnO 3·yLiMO 2的酸化阴极活性材料的组合物，其中M =一种或多种过渡金属，0.1≤x≤0.5,0.5， = y <= 0.9，x + y = 1，导电材料和接合材料; 含有能够嵌入或脱嵌锂离子的正极活性物质的阴极; 和电解质。 因此，可以降低作为锂二次电池的正极活性物质的Li 2 MnO 3 -LiMO 2的初始不可逆容量，并且可以提高诸如放电容量，循环寿命等的电化学特性，以容易地制造具有 成本低，安全性高，容量大，寿命长，可供各种使用。
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公开(公告)号：KR1020160121833A
公开(公告)日：2016-10-21
申请号：KR1020150051537
申请日：2015-04-13
Applicant: 한국전기연구원
IPC: H01M4/58 , H01M4/525 , H01M4/62 , H01M10/052
Abstract: 본발명은, 리튬이차전지용인산염계양극활물질및 그제조방법에있어서, 단사정계 LiV(PO)에철 및티타늄이코-도핑(co-doping)된 LiVFeTi(PO)(x≥0.015)를포함하는것을기술적요지로한다. 이에의해 LiV(PO)에철(Fe) 및티타늄(Ti)을코-도핑(co-doping)하여 LiVFeTi(PO)를리튬이차전지용양극활물질로적용하여리튬이차전지의방전용량을증가, 고출력특성, 사이클특성과같은제반전기화학적특성이향상되어저가, 고안전성, 고용량, 장수명이차전지를제조가능한효과를얻을수 있다.
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公开(公告)号：KR101264343B1
公开(公告)日：2013-05-14
申请号：KR1020110057088
申请日：2011-06-13
Applicant: 한국전기연구원
IPC: H01M4/58 , H01M4/04 , H01M10/052 , H01M4/62
CPC classification number: Y02E60/122 , Y02P70/54 , Y02T10/7011
Abstract: 본발명은전기자동차용등 대형리튬 2차전지용음극활물질로서각광받고있는주석계음극활물질의제조방법에관한것으로, 더욱상세하게는 Sol-Gel법을이용하여균질한화학성분조성의주석계음극활물질복합체를제조하고, 주석계금속이온재료복합체의종류와함량의조절, 환원제의적용, 열처리조건의개발을통하여우수한전지특성을보이는주석계복합체인 Sn-Co-Fe-C를제조하는방법을제공한다. 또한, 본발명에따른제조방법은간단한방법으로주석계복합체 Sn-Co-Fe-C 음극활물질을제조할수 있으며대량생산이용이하고경제적일뿐만아니라, 본발명의 Sn-Co-Fe-C 음극활물질을적용한리튬이차전지는고출력, 고에너지및 긴수명특성을제공한다.
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公开(公告)号：KR1020130049114A
公开(公告)日：2013-05-13
申请号：KR1020110114179
申请日：2011-11-03
Applicant: 한국전기연구원
IPC: H01M4/139 , H01M4/58 , H01M4/62 , H01M10/052
CPC classification number: Y02E60/122 , Y02P70/54 , Y02T10/7011 , H01M4/139 , H01M4/133 , H01M4/134 , H01M4/362 , H01M4/387 , H01M4/587 , H01M4/622 , H01M4/625 , H01M10/0525
Abstract: PURPOSE: A manufacturing method of a negative electrode active material is provided to improve electrochemical performance of a negative electrode by using a styrene butadiene rubber and carboxyl methyl cellulose composite binder. CONSTITUTION: A manufacturing method of a negative electrode active material comprises a step of mixing a metal salt aqueous solution and reducing agent; a step of forming a reducing agent/metal ion sol by mixing the mixture; a step of forming a reducing agent/metal ion gel by heating the sol; a step of sintering the reducing agent/metal ion composite to form Sn-Co-Fe-C composite negative electrode active material; a step of mixing an aqueous binder and conducting agent into the negative electrode active material and manufacturing a negative electrode mixture slurry; and a step of spreading the negative electrode mixture slurry on a CU foil and drying the spread material. [Reference numerals] (AA) Dissolve minimum amount in distilled water at 80°C; (BB) Sn-Co-Fe-C ion mixed solution; (CC) Citric acid(1 molar ratio); (DD) Acrylamide(1-z molar ratio); (EE) N,N'-methylene-bis-acrylamide(z molar ratio); (FF) Stir at 80°C; (GG) (Sn-Co-Fe-C) aqueous solution; (HH) Sn-Co-Fe-C CAM(1 molar ratio); (II) Dry(100°C, 12h); (JJ) Sn-Co-Fe-C composite; (KK) Thermally treat(300°C, 5h, Ar); (LL) Plasticized composite; (MM) Pulverize; (NN) Pulverized plasticized composite; (OO) Thermally treat at 550°C, 3h, Ar, 5°C/min / Pulverize and distribute; (PP) Sn-Co-Fe-C compound anodizing material
Abstract translation: 目的：提供一种负极活性物质的制造方法，其通过使用苯乙烯丁二烯橡胶和羧甲基纤维素复合粘合剂来改善负极的电化学性能。 构成：负极活性物质的制造方法包括将金属盐水溶液和还原剂混合的工序; 通过混合该混合物形成还原剂/金属离子溶胶的步骤; 通过加热溶胶形成还原剂/金属离子凝胶的步骤; 烧结还原剂/金属离子复合物以形成Sn-Co-Fe-C复合负极活性材料的步骤; 将水性粘合剂和导电剂混合到负极活性物质中并制造负极混合浆料的步骤; 以及将负极混合物浆料铺展在CU箔上并干燥铺展材料的步骤。 （标号）（AA）将最小量溶于80℃的蒸馏水中; （BB）Sn-Co-Fe-C离子混合溶液; （CC）柠檬酸（1摩尔比）; （DD）丙烯酰胺（1-z摩尔比）; （EE）N，N'-亚甲基双丙烯酰胺（z摩尔比）; （FF）在80℃下搅拌; （GG）（Sn-Co-Fe-C）水溶液; （HH）Sn-Co-Fe-C CAM（1摩尔比）; （II）干燥（100℃，12h）; （JJ）Sn-Co-Fe-C复合材料; （KK）热处理（300℃，5h，Ar）; （LL）增塑复合材料; （MM）粉碎; （NN）粉碎塑化复合材料; （OO）在550°C，3h，Ar，5°C / min热处理粉碎和分散; （PP）Sn-Co-Fe-C复合阳极氧化材料
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