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：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：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