公开(公告)号：US20160372739A1

公开(公告)日：2016-12-22

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: H01M4/1397 ,  H01M4/04 ,  H01M4/136 ,  H01M4/525 ,  H01M4/48 ,  H01M4/36 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/58

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 0.1C 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.

Abstract translation: 本发明涉及一种使用球形过渡金属络合物碳酸盐的锂二次电池用非水系阴极材料及其制备方法。 根据本发明，通过使用钴材料，镍材料，锰材料，羧基材料和氨材料制备的球形过渡金属络合物碳酸盐的表面涂覆有二氧化钛。 此外，通过将制备的表面被覆的过渡金属络合物碳酸盐与锂材料混合并对所得材料进行热处理，可以制备一次粒径为200nm以上的球形Li-浓阴极材料， 0.1mA容量为250mAh / g以上，并且在充放电60次后能够在全电池中实现96％以上的初始容量。

公开(公告)号：US20230207826A1

公开(公告)日：2023-06-29

申请号：US18065110

申请日：2022-12-13

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Sanggil WOO ,  Jenam LEE

IPC: H01M4/62

CPC classification number: H01M4/625 ,  H01M4/626 ,  H01M2004/027

Abstract: An anode containing a multi-composite conductive agent and a lithium secondary battery including the anode are proposed. The anode may include an anode active material containing a carbon-based material and a metal-based compound, a binder, and a multi-composite conductive agent containing a carbon-based conductive agent and a metal-based conductive agent having different physical properties and shapes. According to some embodiments, the anode can increase energy density and also improve electrical conductivity and electron mobility.

公开(公告)号：US20200328392A1

公开(公告)日：2020-10-15

申请号：US16835464

申请日：2020-03-31

Applicant: Korea Electronics Technology Institute

Inventor： Sanggil WOO ,  Jisang YU ,  Goojin JEONG ,  Jenam LEE

IPC: H01M2/16 ,  H01M10/0525 ,  H01M10/0562 ,  H01M4/134 ,  H01M4/62 ,  H01M4/36

Abstract: The present disclosure provides a separator, a lithium metal negative electrode, and a lithium metal secondary battery which include a solid superacid coating layer. The solid superacid coating layer suppresses a growth of lithium dendrites in a lithium metal secondary battery employing lithium metal as a negative electrode by improving a mobility and a reaction uniformity of lithium at an interface of the lithium metal negative electrode and an electrolyte solution. In the lithium metal secondary battery, the solid superacid coating layer comprising solid superacid material having a porous structure is formed on at least one of the lithium metal negative electrode and the separator.