The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 2020
Filed:
Nov. 11, 2016
Lg Chem, Ltd., Seoul, KR;
Oh Byong Chae, Daejeon, KR;
Su Min Lee, Daejeon, KR;
Eun Kyung Kim, Daejeon, KR;
Sun Young Shin, Daejeon, KR;
LG CHEM, LTD., Seoul, KR;
Abstract
The present invention relates to a negative electrode active material comprising a mixture of a first negative electrode active material and a second negative electrode active material, wherein the first negative electrode active material has a hardness of 1 kg/mmto 10 kg/mmon the basis of the Vickers hardness standard, and the second negative electrode active material has a higher hardness than the first negative electrode active material. The negative electrode active material according to the present invention comprises a mixture of negative electrode active materials having different hardness so that pores of an active material layer are maintained in spite of a rolling process at the time of producing an negative electrode, and the pores acting as an electrolyte flow passage of an electrode can effectively be secured, thereby producing a lithium secondary battery having excellent battery performance by lowering resistance when a battery is charged or discharged.