公开(公告)号：US10541415B2

公开(公告)日：2020-01-21

申请号：US15718386

申请日：2017-09-28

Applicant: Samsung Electronics Co., Ltd. ,  Samsung SDI Co., Ltd.

Inventor： Jeeeun Yang ,  Seunguk Kwon ,  Kyueun Shim ,  Hyoungwoo Choi ,  Sungsoo Han

IPC: H01M4/62 ,  H01M4/13 ,  H01M4/38 ,  H01M10/052 ,  H01M4/02

Abstract: A negative electrode for a lithium secondary battery includes: a negative active material disposed on a current collector; a negative active material layer including a first binder and a conductive agent; and a protective layer disposed on the negative active material layer, wherein the protective layer is in direct contact with the current collector and includes a nonaqueous or aqueous second binder and an inorganic material, wherein, in the protective layer including the aqueous second binder and the inorganic material, the amount of the inorganic material may be about 65 parts by weight or greater, based on 100 parts by weight of the protective layer, and wherein the protective layer including the nonaqueous second binder and the inorganic material, the amount of the inorganic material may be in a range of about 5 parts to about 25 parts by weight, based on 100 parts by weight of the protective layer.

公开(公告)号：US10756350B2

公开(公告)日：2020-08-25

申请号：US15656476

申请日：2017-07-21

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  Samsung SDI Co., Ltd.

Inventor： Woojin Bae ,  Seunguk Kwon ,  Sangkook Mah ,  Jeeeun Yang ,  Dukhyoung Yoon ,  Sungsoo Han

IPC: H01M4/62 ,  H01M4/60 ,  C08G73/10 ,  C08G81/02 ,  C08L87/00 ,  H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  H01M6/16 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/0567

Abstract: A binder includes a third polymer including a cross-linked product of a first polymer and a second polymer, wherein the first polymer includes a first functional group and is at least one selected from a polyamic acid and a polyimide, wherein the second polymer includes a second functional group and is water-soluble, and wherein the first polymer and the second polymer are cross-linked by an ester bond formed by a reaction of the first functional group and the second functional.

公开(公告)号：US10186709B2

公开(公告)日：2019-01-22

申请号：US15356932

申请日：2016-11-21

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Woojin Bae ,  Seunguk Kwon ,  Jeeeun Yang

IPC: C08G69/48 ,  H01M4/62 ,  H01M4/36 ,  H01M4/38 ,  H01M4/04 ,  H01M4/139 ,  C08G73/10 ,  H01M4/587

Abstract: A water-soluble partially lithiated polyamic acid having an acid equivalent of less than 300 grams per equivalent and a degree of lithium ion substitution of from about 0.2 equivalents to about 1.0 equivalent with respect to carboxylic acid groups, which is a product of a polyamic acid and lithium hydroxide.

公开(公告)号：US20180097235A1

公开(公告)日：2018-04-05

申请号：US15718386

申请日：2017-09-28

Applicant: Samsung Electronics Co., Ltd. ,  Samsung SDI Co., Ltd.

Inventor： Jeeeun Yang ,  Seunguk Kwon ,  Kyueun Shim ,  Hyoungwoo Choi ,  Sungsoo Han

IPC: H01M4/62 ,  H01M4/38 ,  H01M10/052

Abstract: A negative electrode for a lithium secondary battery includes: a negative active material disposed on a current collector; a negative active material layer including a first binder and a conductive agent; and a protective layer disposed on the negative active material layer, wherein the protective layer is in direct contact with the current collector and includes a nonaqueous or aqueous second binder and an inorganic material, wherein, in the protective layer including the aqueous second binder and the inorganic material, the amount of the inorganic material may be about 65 parts by weight or greater, based on 100 parts by weight of the protective layer, and wherein the protective layer including the nonaqueous second binder and the inorganic material, the amount of the inorganic material may be in a range of about 5 parts to about 25 parts by weight, based on 100 parts by weight of the protective layer.