公开(公告)号：US10431812B2

公开(公告)日：2019-10-01

申请号：US15105474

申请日：2014-10-29

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Junho Song ,  Youngjun Kim ,  Jeomsoo Kim ,  Woosuk Cho ,  Sanggil Woo ,  Taeeun Yim ,  Kyungjun Lee ,  Yeonggwang Park

IPC: H01M4/505 ,  H01M4/1397 ,  H01M4/525 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/58 ,  C01G53/00 ,  H01M4/04 ,  H01M4/136 ,  H01M4/48 ,  H01M10/0525 ,  H01M4/02

Abstract: The present invention relates to a non-aqueous cathode material for lithium secondary batteries using a spherical transition metal complex carbonate, and a method for preparing same. According to the present invention, since the surface of a spherical transition metal complex carbonate, which is prepared by using a cobalt material, nickel material, manganese material, carboxyl group material, and ammonia material, is coated with titanium dioxide. In addition, by mixing the prepared, surface-coated transition metal complex carbonate with a lithium material and heat-treating the resultant material, it is possible to prepare a spherical Li-rich cathode material having a primary particle size of 200 nm or more, and a 0.1 C capacity of 250 mAh/g or more, and capable of implementing 96% or more of the initial capacity in a full cell after charging and discharging 60 times.

公开(公告)号：US10367199B2

公开(公告)日：2019-07-30

申请号：US15123618

申请日：2014-09-12

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Woosuk Cho ,  Jeomsoo Kim ,  Junho Song ,  Taeeun Yim ,  Sanggil Woo ,  Youngjun Kim ,  Kowoon Lee

IPC: H01M4/525 ,  H01M4/485 ,  C01G53/00 ,  C01G23/047 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/052 ,  H01M4/02

Abstract: The present invention relates to a cathode active material, a lithium secondary battery having the same, and a method for preparing the same, and the purpose of the present invention is to provide battery properties and thermal stability under a high temperature environment even if the Ni content of M in LiMO2(M=Ni, Co, Ti, Zr, etc.) of layered oxide is increased to 65% or more. The present invention provides a cathode active material for a lithium secondary battery which is represented by chemical formula 1 below and is obtained by substituting a part of Ni, Co and Mn for a dissimilar metal (M) through heat treatment with a lithium source after coating the dissimilar metal (M) on the surface of a transition metal precursor comprising Ni, Co and Mn. LiNiaCobMncMdO2  [Chemical Formula 1] (0.6

公开(公告)号：US20170077514A1

公开(公告)日：2017-03-16

申请号：US15123618

申请日：2014-09-12

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Woosuk Cho ,  Jeomsoo Kim ,  Junho Song ,  Taeeun Yim ,  Sanggil Woo ,  Youngjun Kim ,  Kowoon Lee

IPC: H01M4/525 ,  C01G23/047 ,  C01G53/00 ,  H01M4/505 ,  H01M10/0525

CPC classification number: H01M4/525 ,  C01G23/047 ,  C01G53/006 ,  C01G53/50 ,  C01P2002/72 ,  C01P2002/85 ,  C01P2004/03 ,  C01P2004/84 ,  C01P2006/40 ,  H01M4/485 ,  H01M4/505 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028

Abstract: The present invention relates to a cathode active material, a lithium secondary battery having the same, and a method for preparing the same, and the purpose of the present invention is to provide battery properties and thermal stability under a high temperature environment even if the Ni content of M in LiMO2(M=Ni, Co, Ti, Zr, etc.) of layered oxide is increased to 65% or more. The present invention provides a cathode active material for a lithium secondary battery which is represented by chemical formula 1 below and is obtained by substituting a part of Ni, Co and Mn for a dissimilar metal (M) through heat treatment with a lithium source after coating the dissimilar metal (M) on the surface of a transition metal precursor comprising Ni, Co and Mn. LiNiaCobMncMdO2   [Chemical Formula 1] (0.6

Abstract translation: （0.6

公开(公告)号：US20150030954A1

公开(公告)日：2015-01-29

申请号：US14376701

申请日：2013-01-31

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Youngjun Kim ,  Kijae Kim ,  Minsik Park ,  Jeahun Kim

IPC: H01M4/86 ,  H01M4/92 ,  H01M8/20 ,  H01M8/24 ,  H01M8/18 ,  H01M4/90 ,  H01M2/40

CPC classification number: H01M4/8605 ,  C23C30/00 ,  H01M2/40 ,  H01M4/9041 ,  H01M4/92 ,  H01M8/0273 ,  H01M8/188 ,  H01M8/20 ,  H01M8/2459 ,  H01M2250/10 ,  H01M2300/0017 ,  Y02B90/14 ,  Y02E60/528

Abstract: The present invention relates to a redox flow secondary battery. The redox flow secondary battery of the present invention comprises a unit cell including a pair of electrodes made of a porous metal, wherein the surface of the porous metal is coated with carbon. According to the present invention, a redox flow secondary battery using porous metal electrodes uniformly coated with carbon is provided, thus improving conductivity of the electrodes, and the electrodes have surfaces uniformly coated with a carbon layer having a wide specific surface area, thus improving reactivity. As a result, capacity of the redox flow secondary battery and energy efficiency can be improved and resistance of a cell can be effectively reduced. Further, the electrodes are uniformly coated with a carbon layer, thus also improving corrosion resistance.

Abstract translation: 本发明涉及氧化还原液二次电池。 本发明的氧化还原液二次电池包括由多孔金属制成的一对电极的单电池，其中多孔金属的表面被碳覆盖。 根据本发明，提供了使用均​​匀涂覆有碳的多孔金属电极的氧化还原液二次电池，从而提高电极的导电性，并且电极具有均匀涂覆有比表面积宽的碳层的表面，从而提高反应性 。 结果，可以提高氧化还原液二次电池的容量和能量效率，并且可以有效地降低电池的电阻。 此外，电极均匀地涂覆有碳层，从而也提高耐腐蚀性。

公开(公告)号：US10270083B2

公开(公告)日：2019-04-23

申请号：US15368476

申请日：2016-12-02

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Goojin Jeong ,  Youngjun Kim ,  Hansu Kim ,  Juhye Song

IPC: H01M4/04 ,  H01M4/36 ,  H01M4/38 ,  H01M4/62 ,  H01M4/134 ,  H01M10/0525

Abstract: The present invention relates to a negative electrode for a lithium secondary battery that can ensure a high energy density, a long-life characteristic, and stability by forming a film on a negative electrode for a lithium secondary battery and thus suppressing dendrites during electrodeposition, a method of manufacturing the same, and a lithium secondary battery using the same. The method of manufacturing the negative electrode for a lithium secondary battery according to the present invention includes preparing a sulfur dioxide-based sodium molten salt and forming a protective layer on the surface of a current collector by immersing the current collector in the sulfur dioxide-based sodium molten salt.

公开(公告)号：US09525178B2

公开(公告)日：2016-12-20

申请号：US14376701

申请日：2013-01-31

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Youngjun Kim ,  Kijae Kim ,  Minsik Park ,  Jeahun Kim

IPC: H01M8/18 ,  H01M4/86 ,  C23C30/00 ,  H01M2/40 ,  H01M4/90 ,  H01M4/92 ,  H01M8/20 ,  H01M8/24

CPC classification number: H01M4/8605 ,  C23C30/00 ,  H01M2/40 ,  H01M4/9041 ,  H01M4/92 ,  H01M8/0273 ,  H01M8/188 ,  H01M8/20 ,  H01M8/2459 ,  H01M2250/10 ,  H01M2300/0017 ,  Y02B90/14 ,  Y02E60/528

Abstract: The present invention relates to a redox flow secondary battery. The redox flow secondary battery of the present invention comprises a unit cell including a pair of electrodes made of a porous metal, wherein the surface of the porous metal is coated with carbon. According to the present invention, a redox flow secondary battery using porous metal electrodes uniformly coated with carbon is provided, thus improving conductivity of the electrodes, and the electrodes have surfaces uniformly coated with a carbon layer having a wide specific surface area, thus improving reactivity. As a result, capacity of the redox flow secondary battery and energy efficiency can be improved and resistance of a cell can be effectively reduced. Further, the electrodes are uniformly coated with a carbon layer, thus also improving corrosion resistance.

Abstract translation: 本发明涉及氧化还原液二次电池。 本发明的氧化还原液二次电池包括由多孔金属制成的一对电极的单电池，其中多孔金属的表面被碳覆盖。 根据本发明，提供了使用均​​匀涂覆有碳的多孔金属电极的氧化还原液二次电池，从而提高电极的导电性，并且电极具有均匀涂覆有比表面积宽的碳层的表面，从而提高反应性 。 结果，可以提高氧化还原液二次电池的容量和能量效率，并且可以有效地降低电池的电阻。 此外，电极均匀地涂覆有碳层，从而也提高耐腐蚀性。