公开(公告)号：US20190312308A1

公开(公告)日：2019-10-10

申请号：US16373374

申请日：2019-04-02

Applicant: Samsung SDI Co., Ltd.

Inventor： Hyejin PARK ,  Jungjin MOON ,  Myungheui WOO ,  Harim LEE ,  Jin-Hyeok LIM ,  Seonghun JEONG ,  Wonseok CHO ,  Hyunbong CHOI

IPC: H01M10/0567 ,  H01M10/0568 ,  H01M10/0569

Abstract: Aspects of embodiments of the present disclosure provide an electrolyte for a rechargeable lithium battery, and a rechargeable lithium battery including the same. The electrolyte includes a non-aqueous organic solvent, a lithium salt, and additive represented by Chemical Formula 1: In Chemical Formula 1, X1 is CH or a nitrogen atom (N), and Ra is a substituted or unsubstituted alkyl group. The additive may decompose under reducing voltages on the surface of the negative electrode to thereby form a polysulfonate-based passivation film to suppress or reduce gas generation and battery swelling.

公开(公告)号：US20190148776A1

公开(公告)日：2019-05-16

申请号：US16300134

申请日：2017-06-08

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Inhaeng CHO ,  Hyejin PARK ,  Seonghun JEONG ,  Sanghoon KIM

IPC: H01M10/0569 ,  H01M10/0567 ,  H01M10/052 ,  H01M10/0568

Abstract: A lithium battery includes: a cathode having a mixture density of 3.9 g/cc or greater; an anode; and an electrolyte including a non-aqueous organic solvent disposed between the cathode and the anode, wherein the lithium battery has an operating voltage of 4.4 V or greater, and the non-aqueous organic solvent includes at least one first non-aqueous organic solvent selected from ethyl butyrate and methyl valerate, and the first non-aqueous organic solvent is contained in an amount of 20 to 50 volume % with based on a total volume of the non-aqueous organic solvent.