Ulsan National Institute of Science and Technology

Lg Energy Solution, Ltd.

Lg Chem, Ltd

Unist, Inc.

Ju Myung Kim

Sang Young Lee

Je Young Kim

Jae Hyun Lee

In Sung Uhm

Yo Han Kwon

Joon Won Lim

Seong Hyeok Kim

Seung Beom Cho

Wook Jang

Jang Hoon Park

Jun Seong Ahn

The present invention relates to a three-dimensional structure electrode, a method for manufacturing same, and an electrochemical element including the electrode. The present invention is characterized by comprising: (a) an upper conductive layer and a lower conductive layer which have a structure constituting an assembly within which a conductive material and a porous nonwoven fabric including a plurality of polymeric fibers are three-dimensionally connected in an irregular and continuous manner, thereby forming a mutually connected porous structure; and (b) an active material layer forming the same assembly structure as the conductive layers and forming a three-dimensionally filled structure in which electrode active material particles are uniformly filled inside the mutually connected porous structure formed in the assembly structure, wherein the active material layer is formed between the upper conductive layer and the lower conductive layer.

Three-dimensional structure electrode and electrochemical element including same

The present invention relates to a surface coated positive electrode active material, a preparation method thereof, and a lithium secondary battery including the same. More specifically, it relates to a positive electrode active material of which surface is coated with a nanofilm including polyimide (PI) and carbon black, a preparation method thereof, and a lithium secondary battery including the same. The positive electrode active material of which surface is coated with the nanofilm according to the present invention is capable of preventing direct contact of the positive electrode active material with an electrolyte thereby suppressing a side reaction between the positive electrode active material and the electrolyte, and as a result, a lifespan property of a lithium secondary battery using a positive electrode including the same may be significantly improved, and particularly, a lifespan property and conductivity are capable of being enhanced under a high temperature and high voltage condition.

Surface coated positive electrode active material, preparation method thereof and lithium secondary battery including the same

Growing community of inventors

Gangwon-do, South Korea

Ju Myung Kim