公开(公告)号：US20180248223A1

公开(公告)日：2018-08-30

申请号：US15754630

申请日：2016-08-23

Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY

Inventor： Ho Sung KIM ,  Min-Young KIM ,  Seung Hoon YANG ,  Jinsub LIM ,  Duck Rye CHANG ,  Jong Ho LEE

IPC: H01M10/0562 ,  H01M10/0585 ,  H01M10/0525

CPC classification number: H01M10/0562 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0585 ,  H01M2300/0071

Abstract: Disclosed is a method of preparing a solid electrolyte, which includes (a) preparing a solid electrolyte precursor slurry by subjecting a mixed solution including a metal precursor solution, containing a lanthanum precursor, a zirconium precursor and an aluminum precursor, a complexing agent, and a pH controller to coprecipitation, (b) preparing a solid electrolyte precursor by washing and drying the solid electrolyte precursor slurry, (c) preparing a mixture by mixing the solid electrolyte precursor with a lithium source, and (d) preparing an aluminum-doped lithium lanthanum zirconium oxide (LLZO) solid electrolyte by calcining the mixture, and which is also capable of adjusting the aluminum content of a starting material to thus control sintering properties and of adjusting the composition of a precursor and a lithium source to thus control the crystal structure, thereby improving the ionic conductivity of the solid electrolyte. In addition, a method of manufacturing an all-solid-state lithium secondary battery, including a solid electrolyte having improved ion conductivity, can be provided using the method of preparing the solid electrolyte.

公开(公告)号：US20190036159A1

公开(公告)日：2019-01-31

申请号：US16047247

申请日：2018-07-27

Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY

Inventor： Ho Sung KIM ,  Seung Hoon YANG ,  Min-young KIM ,  Ha Young JUNG ,  Da Hye KIM

IPC: H01M10/0562 ,  H01M10/052 ,  H01M10/0585 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62

CPC classification number: H01M10/0562 ,  C04B35/486 ,  C04B35/63488 ,  C04B2235/3203 ,  C04B2235/3217 ,  C04B2235/3227 ,  C04B2235/3286 ,  C04B2235/6025 ,  C04B2235/6567 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M4/625 ,  H01M10/052 ,  H01M10/0585 ,  H01M2300/0077

Abstract: Disclosed is a gallium (Ga)-doped LLZO solid electrolyte represented by Chemical Formula 1 below, a method of preparing the same, and an all-solid-state lithium secondary battery including the same. In the solid electrolyte according to the present invention and the preparation method thereof, the amounts of gallium and lithium of starting materials are adjusted and the flow rate of materials to be supplied is controlled, thus forming a high-precision cubic structure and improving sintering properties, thereby increasing the ionic conductivity of the solid electrolyte. The lithium secondary battery including the solid electrolyte can exhibit superior charge/discharge characteristics and cycle characteristics. LixGayLazZrwO12(5≤x≤9, 0

公开(公告)号：US20180309163A1

公开(公告)日：2018-10-25

申请号：US15888667

申请日：2018-02-05

Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY

Inventor： Ho Sung KIM ,  Min Young KIM ,  Seung Hoon YANG ,  Da Hye KIM ,  Ha Young JUNG ,  Hye Min RYU ,  Jin Sub LIM

IPC: H01M10/0525 ,  H01M10/04 ,  H01M10/0585 ,  H01M4/66 ,  H01M4/38 ,  H01M4/134 ,  H01M10/0562

CPC classification number: H01M10/0525 ,  H01M4/134 ,  H01M4/382 ,  H01M4/661 ,  H01M10/0418 ,  H01M10/044 ,  H01M10/0562 ,  H01M10/0585 ,  H01M2004/029 ,  H01M2220/20 ,  H01M2220/30

Abstract: Disclosed is a bipolar all solid-state battery, which can efficiently control a manufacturing process thereof and can improve electric properties thereof. In an exemplary embodiment, the bipolar all solid-state battery includes a unit cell including a first current collector having a first surface and a second surface opposite to the first surface; a first active material coated on the first surface of the first current collector, a second current collector having a first surface and a second surface opposite to the first surface; a second active material coated on the first surface of the second current collector and facing the first active material; and an all solid-state electrolyte formed between the first active material and the second active material. When a plurality of the unit cells are stacked, the first current collector and the second current collector are connected to each other through surface contact.

公开(公告)号：US20190273283A1

公开(公告)日：2019-09-05

申请号：US16348675

申请日：2017-10-27

Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY

Inventor： Ho Sung KIM ,  Min Young KIM ,  Seung Hoon YANG ,  Da Hye KIM ,  Hye Min RYU ,  Ha Young JUNG

IPC: H01M10/0562 ,  H01M10/058 ,  H01M10/052 ,  C01G25/02

Abstract: Disclosed is a method of preparing a solid electrolyte, the method including (a) preparing a solid electrolyte precursor by subjecting a mixed solution composed of a lanthanum precursor, a zirconium precursor, a gallium precursor, a complexing agent, and a pH adjuster to coprecipitation, (b) washing and drying the solid electrolyte precursor, (c) preparing a mixture by mixing the washed and dried solid electrolyte precursor with a lithium source, and (d) calcining the mixture to give a calcined solid electrolyte, which is a gallium (Ga)-doped lithium lanthanum zirconium oxide (LLZO), as represented by Chemical Formula 1. A solid electrolyte having increased ionic conductivity and an improved potential window can be provided using the method of preparing the solid electrolyte.

公开(公告)号：US20190051934A1

公开(公告)日：2019-02-14

申请号：US16072571

申请日：2016-11-15

Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY

Inventor： Ho Sung KIM ,  Min-Young Kim ,  Seung Hoon YANG ,  Da-Hye KIM ,  Kyeong Joon KIM ,  Seung Woo CHOI ,  Jinsub LIM ,  Duck Rye CHANG

IPC: H01M10/0562 ,  H01M10/052 ,  H01M10/058 ,  H01M4/505 ,  H01M4/525

Abstract: The present invention relates to an all-solid-state lithium secondary battery and a method of manufacturing the same. The all-solid-state lithium secondary battery includes a cathode, an anode, and a composite solid electrolyte layer between the cathode and the anode, wherein first and second LLZOs contained respectively in the cathode and the composite solid electrolyte layer are each independently aluminum-doped or undoped LLZO, and the battery of the invention can exhibit improved discharge capacity and cycle characteristics because both the cathode and the composite solid electrolyte layer contain a conductive polymer, a lithium salt and an inorganic ceramic solid electrolyte. The method of the invention enables the all-solid-state lithium secondary battery to be manufactured in a non-sintering manner, thus reducing manufacturing costs and controlling interfacial reactions between active materials, between solid electrolyte particles, and between an electrolyte and an electrode, thereby further reducing the internal resistance of the battery.