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公开(公告)号：KR101828676B1
公开(公告)日：2018-02-14
申请号：KR1020160048330
申请日：2016-04-20
Applicant: 동국대학교 산학협력단
IPC: C01B33/02 , C01B31/04 , H01M4/134 , H01M10/0525 , C09D161/32
CPC classification number: C01B32/182 , C01B33/02 , C09D161/32 , H01M4/134 , H01M10/0525
Abstract: 탄소가코팅된실리콘나노입자및 그래핀으로형성된샌드위치형그래핀복합구조체와그 제조방법이제공된다. 친환경적인여과공정을통하여탄소가코팅된실리콘그래핀을샌드위치형그래핀복합구조체로형성한다. 형성된샌드위치형그래핀복합구조체는실리콘의부피팽창을완화한다. 또한, 실리콘표면에코팅된탄소에의해전기전도성을향상시켜고용량의음극재로사용될수 있다.
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公开(公告)号：KR101451901B1
公开(公告)日：2014-10-22
申请号：KR1020120110816
申请日：2012-10-05
Applicant: 동국대학교 산학협력단
IPC: H01M4/485 , H01M4/1391 , B82B3/00 , H01M10/052
Abstract: 본 발명은 리튬이차전지의 스피넬 리튬 티타늄 옥사이드 나노막대 음극활물질 제조방법에 관한 것이다. 본 발명의 리튬이차전지의 스피넬 리튬 티타늄 옥사이드 나노막대 음극활물질 제조방법은, (S1) 티타늄옥사이드(TiO2) 분말로부터 수열합성에 의해 타이타네이트 나노막대를 제조하는 단계; (S2) 상기 타이타네이트 나노막대 및 리튬 전구체로부터 이온교환법에 의해 리튬타이타네이트(Li-TiO) 나노막대를 제조하는 단계; (S3) 상기 리튬타이타네이트 나노막대를 열처리하는 단계; 를 포함한다.
본 발명의 제조방법에 따라 제조된 리튬이차전지의 스피넬 리튬 티타늄 옥사이드 나노섬유 음극활물질에 따르면, 스피넬 리튬 티타늄 옥사이드 나노섬유의 단위 부피당 넓은 표면적을 통해 전해액과 도전제의 접촉면적 증가와 리튬 이온 확산 거리의 감소로 전기 전도성과 이온 전도성 향상에 크게 기여할 수 있다. 아울러, 공정 측면에서 이온교환법을 통해 발생하는 소듐 등의 잔류 금속에 의한 리튬 이온 확산 활성화 에너지 장벽 감소로 인한 리튬이온 확산도 향상 효과를 추가적으로 얻을 수 있다.Abstract translation: 本发明涉及锂二次电池负极的尖晶石型锂二氧化钛纳米棒的制造方法。 该方法包括通过水热合成从钛氧化物粉末制造钛酸盐纳米棒的步骤; 通过离子交换法从钛酸盐和锂前体制造钛酸锂纳米棒的步骤; 以及用于热处理钛酸锂纳米棒的步骤。 通过该方法制造的锂二次电池的尖晶石型锂二氧化钛纳米棒通过每单位体积的尖晶石型锂钛氧化物的宽表面积增大电解液与导体之间的接触面积，通过减少电导率和离子传导性，显着提高导电性和离子传导性 锂离子的扩散距离，并且还通过由离子交换法产生的残留的金属如钠降低锂离子扩散活化能势垒来提高锂离子扩散度。
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公开(公告)号：KR1020140044621A
公开(公告)日：2014-04-15
申请号：KR1020120110816
申请日：2012-10-05
Applicant: 동국대학교 산학협력단
IPC: H01M4/485 , H01M4/1391 , B82B3/00 , H01M10/052
CPC classification number: C01G23/005 , C01P2006/40 , H01M4/131 , H01M4/485 , H01M10/0525 , Y02E60/122
Abstract: The present invention relates to a method for manufacturing a spinel lithium titanium oxide nanorod for a negative electrode of a lithium secondary battery. The method includes a step for manufacturing a titanate nanorod from titanium oxide powder by a hydrothermal synthesis; a step for manufacturing a lithium titanate nanorod from the titanate and a lithium precursor by an ion exchange method; and a step for heat-treating the lithium titanate nanorod. The spinel lithium titanium oxide nanorod for a lithium secondary battery manufactured by the method increases the contact area between an electrolyte solution and a conductor by wide surface area per unit volume of the spinel lithium titanium oxide, remarkably improves electric conductivity and ion conductivity by reducing the diffusion distance of lithium ions, and, additionally, improves lithium ion diffusion degree by reducing lithium ion diffusion activation energy barrier by residual metals such as sodium, which are generated by the ion exchange method.
Abstract translation: 本发明涉及锂二次电池负极的尖晶石型锂二氧化钛纳米棒的制造方法。 该方法包括通过水热合成从钛氧化物粉末制造钛酸盐纳米棒的步骤; 通过离子交换法从钛酸盐和锂前体制造钛酸锂纳米棒的步骤; 以及用于热处理钛酸锂纳米棒的步骤。 通过该方法制造的锂二次电池的尖晶石型锂二氧化钛纳米棒通过每单位体积的尖晶石型锂钛氧化物的宽表面积增大电解液与导体之间的接触面积，通过减少电导率和离子传导性，显着提高导电性和离子传导性 锂离子的扩散距离，并且还通过由离子交换法产生的残留的金属如钠降低锂离子扩散活化能势垒来提高锂离子扩散度。
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Patent Agency Ranking
公开(公告)号：KR1020170120254A
公开(公告)日：2017-10-31
申请号：KR1020160048330
申请日：2016-04-20
Applicant: 동국대학교 산학협력단
IPC: C01B33/02 , C01B31/04 , H01M4/134 , H01M10/0525 , C09D161/32
CPC classification number: C01B32/182 , C01B33/02 , C09D161/32 , H01M4/134 , H01M10/0525 , C01B32/23 , C01P2004/64 , C01P2006/40 , Y02E60/122
Abstract: 탄소가코팅된실리콘나노입자및 그래핀으로형성된샌드위치형그래핀복합구조체와그 제조방법이제공된다. 친환경적인여과공정을통하여탄소가코팅된실리콘그래핀을샌드위치형그래핀복합구조체로형성한다. 형성된샌드위치형그래핀복합구조체는실리콘의부피팽창을완화한다. 또한, 실리콘표면에코팅된탄소에의해전기전도성을향상시켜고용량의음극재로사용될수 있다.
Abstract translation: 提供了一种由碳包覆的硅纳米颗粒和石墨烯形成的夹层型石墨烯复合结构及其制造方法。 通过环境友好的过滤工艺将碳涂覆的硅石墨烯形成为夹层型石墨烯复合结构。 所形成的夹层型石墨烯复合结构放松了硅的体积膨胀。 另外，通过改善硅表面上涂覆的碳的电导率，它可以用作高容量阳极材料。
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公开(公告)号：KR1020160044699A
公开(公告)日：2016-04-26
申请号：KR1020140139273
申请日：2014-10-15
Applicant: 주식회사 포스코 , 재단법인 포항산업과학연구원 , 동국대학교 산학협력단
CPC classification number: H01M4/9016 , H01M4/382 , H01M12/08 , H01M2300/0028 , Y02E60/128 , H01M4/90 , H01M4/88 , H01M2004/028 , Y02E60/12
Abstract: 리튬-공기이차전지용양극촉매, 이의제조방법, 및이를포함하는리튬-공기이차전지가개시된다. 본발명의일 구현예는, 티타늄이온전구체를용매에첨가한후, 교반하여제1 용액을형성하는단계; 유기물을용매에첨가한후, 교반하여제2 용액을형성하는단계; 상기제1 및제2 용액을혼합한후, 상기혼합용액을방사하여나노섬유복합체를형성하는단계; 및상기나노섬유복합체를열처리하여티타늄옥사이드(TiO) 나노섬유를형성하는단계;를포함하는리튬-공기이차전지용양극촉매의제조방법를제공한다.
Abstract translation: 公开了一种用于锂空气二次电池的正极催化剂和包括其的锂 - 空气二次电池。 本发明的一个实施方案提供了一种用于锂空气二次电池的正极催化剂的制造方法。 制造方法包括以下步骤：通过向溶剂中加入钛离子前体，然后搅拌形成第一溶液; 通过向溶剂中加入有机物质然后搅拌形成第二溶液; 通过混合第一和第二溶液然后辐射混合溶液形成纳米纤维复合物; 并通过热处理纳米纤维复合体形成二氧化钛（TiO_2）纳米纤维。
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公开(公告)号：KR1020140102382A
公开(公告)日：2014-08-22
申请号：KR1020130015405
申请日：2013-02-13
Applicant: 주식회사 포스코 , 동국대학교 산학협력단 , 재단법인 포항산업과학연구원
CPC classification number: Y02E60/128
Abstract: The present invention relates to a cathode catalyst for a lithium-air secondary battery, a manufacturing method thereof and a lithium-air secondary battery including the same. The manufacturing method for a cathode catalyst for a lithium-air secondary battery of the present invention comprises a first step of forming an aqueous solution by dissolving manganese ion precursors in distilled water; a second step of manufacturing a mixture by stirring the aqueous solution formed in the first step with a compound selected from the group consisting of potassium permanganate (KMnO_4), sodium permanganate (NaMnO_4), ammonium permanganate (NH_4MnO_4) and calcium permanganate (Ca(MnO_4)_2); a third step of synthesizing alpha phase manganese oxide nanowires (α-MnO_2 nanowires) by hydrothermally synthesizing the mixture manufactured in the second step; and a fourth step of pulverizing the alpha phase manganese oxide nanowires (α-MnO_2 nanowires) by drying the same. The cathode catalyst for a lithium-air secondary battery manufactured according to the manufacturing method of the present invention is able to lower charge and discharge overvoltage by accelerating oxygen reaction in a positive electrode of a lithium-air secondary battery and is able to improve energy efficiency.
Abstract translation: 本发明涉及一种锂空气二次电池用阴极催化剂及其制造方法以及包含该锂二次电池的锂空气二次电池。 本发明的锂空气二次电池用阴极催化剂的制造方法包括：通过将锰离子前体溶解在蒸馏水中而形成水溶液的第一工序; 通过用选自高锰酸钾（KMnO_4），高锰酸钠（NaMnO_4），高锰酸铵（NH_4MnO_4）和高锰酸钙（Ca（MnO4））的化合物搅拌第一步骤中形成的水溶液制备混合物的第二步骤 ）_2）; 通过水热合成在第二步骤中制造的混合物来合成α相锰氧化物纳米线（α-MnO_2纳米线）的第三步骤; 以及通过干燥α相锰氧化物纳米线（α-MnO_2纳米线）的第四步骤。 根据本发明的制造方法制造的锂空气二次电池用阴极催化剂能够通过加速锂空气二次电池的正极中的氧反应来降低充放电过电压，能够提高能量效率 。
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公开(公告)号：KR1020140036535A
公开(公告)日：2014-03-26
申请号：KR1020120102740
申请日：2012-09-17
Applicant: 동국대학교 산학협력단
IPC: H01M10/052 , H01M4/38 , H01M4/583 , H01M10/0567
CPC classification number: H01M4/366 , H01M4/02 , H01M4/0419 , H01M4/0438 , H01M4/0471 , H01M4/133 , H01M4/134 , H01M4/364 , H01M4/386 , H01M4/583 , H01M4/587 , H01M4/622 , H01M4/623 , H01M10/052 , H01M10/0567 , H01M2004/025 , H01M2004/027 , Y02T10/7011
Abstract: The present invention relates to: a negative electrode applied with a silicon-carbon composite that has a small volume expansion upon an insertion of lithium ions and has excellent ionic and electric conductivities thereby capable of maintaining a high capacity; a lithium secondary battery that includes an electrolyte capable of improving electrochemical properties thereof; and a preparation method thereof. The lithium secondary battery of the present invention: uses the silicon-carbon composite of a negative electrode active material for integrating silicon and carbon fibers; reduces the volume expansion when the lithium ions are inserted by coating the surface of silicon particles with amorphous silica; has excellent ionic conductivity and electric conductivity for consistently maintaining a high capacity; and furthermore, improves electrochemical properties of the silicon-carbon composite including coulombic efficiency, capacity improvement and rate determining properties by using the electrolyte containing additives such as FEC, VEC, VC, EC, DFEC, t-butyl benzene, and t-pentyl benzene.
Abstract translation: 本发明涉及一种负极，其上涂有硅 - 碳复合材料，其在插入锂离子时体积膨胀小，并且具有优异的离子和电导率，从而能够保持高容量; 锂二次电池，其包括能够改善其电化学性质的电解质; 及其制备方法。 本发明的锂二次电池：使用负极活性物质的硅 - 碳复合体来集成硅和碳纤维; 通过用无定形二氧化硅涂覆硅颗粒的表面来减少锂离子插入时的体积膨胀; 具有优异的离子导电性和电导率，可以持续保持高容量; 此外，通过使用含有电解质的添加剂如FEC，VEC，VC，EC，DFEC，叔丁基苯和叔戊基苯，改善了包括库仑效率，容量改进和速率测定性能的硅 - 碳复合材料的电化学性能 。
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公开(公告)号：KR101341951B1
公开(公告)日：2013-12-16
申请号：KR1020120079965
申请日：2012-07-23
Applicant: 동국대학교 산학협력단
IPC: H01M4/583 , H01M4/38 , H01M4/13 , H01M10/052
CPC classification number: H01M4/0438 , H01M4/0471 , H01M4/133 , H01M4/134 , H01M4/1393 , H01M4/1395 , H01M4/362 , H01M4/366 , H01M4/386 , H01M4/587 , Y02E60/122 , Y10S977/734 , Y10T428/2993
Abstract: The present invention relates to a silicon-carbon composite for negative electrode of a lithium secondary battery. The silicon-carbon composite comprises carbon fiber and silicon particles, and the silicon particles are coated by non-crystalline silica. The silicon-carbon composite can reduce volume expansion when inserting lithium ions by compounding silicon and carbon fiber, and coating the surface of the silicon particles with the non-crystalline silica, in addition, the excellent electricity and ion conductance can maintain the high capacity. The silicon-carbon composite has a stable complex structure and a large specific surface by the silicon coated with the non-crystalline silica inside of the carbon fiber having a one dimensional structure.
Abstract translation: 本发明涉及锂二次电池用负极用硅碳复合体。 硅 - 碳复合材料包括碳纤维和硅颗粒，并且硅颗粒被非结晶二氧化硅涂覆。 硅 - 碳复合材料可以通过复合硅和碳纤维来插入锂离子而减少体积膨胀，并且用非结晶二氧化硅涂覆硅颗粒的表面，此外，优异的电离离子电导能保持高容量。 硅 - 碳复合材料具有稳定的复合结构，并且通过在具有一维结构的碳纤维内的非结晶二氧化硅涂覆的硅具有大的比表面积。
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