公开(公告)号：US11621422B2

公开(公告)日：2023-04-04

申请号：US16476929

申请日：2018-01-10

Applicant: DAICEL CORPORATION ,  DAICEL FINECHEM LTD.

Inventor： Masao Iwaya ,  Shinya Ono ,  Naoki Doi

IPC: H01M4/62 ,  H01M4/587 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/134 ,  C08L1/28 ,  B05D7/14 ,  H01M4/04 ,  B05D7/24 ,  H01M4/583

Abstract: An electrode slurry contains (A) a cellulose fiber, (B) a carboxymethyl-group-containing cellulose ether or a salt thereof, and a particulate material containing at least (C) an electrode active material, and the cellulose fiber (A) has an average fiber length of 1 to 750 μm. The amount of the carboxymethyl-group-containing cellulose ether or the salt thereof (B) is 0.1 to 3 parts by weight based on 100 parts by weight of the total amount of the cellulose fiber (A), the carboxymethyl-group-containing cellulose ether or the salt thereof (B), and the electrode active material (C), in terms of solid content. The present invention provides an electrode slurry that allows an improved surface smoothness (coating uniformity) of an electrode and an improved coating property, a process for producing the electrode slurry, an electrode, a process for producing the electrode, a non-aqueous secondary battery, and a lithium-ion secondary battery.

公开(公告)号：US11094934B2

公开(公告)日：2021-08-17

申请号：US16474594

申请日：2018-01-10

Applicant: Daicel Corporation ,  Daicel FineChem Ltd.

Inventor： Masao Iwaya ,  Shinya Ono ,  Naoki Doi

IPC: H01M4/38 ,  H01M4/04 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/66 ,  H01M10/0525

Abstract: An electrode slurry contains (A) a cellulose fiber and (C) an electrode active material, the electrode active material (C) contains at least a silicon particle and may contain a silicon particle and a carbonaceous particle. The slurry may further contain (B) a carboxymethyl-group-containing cellulose ether or a salt thereof. The average fiber length L (1 to 750 μm) of the cellulose fiber (A) is larger than the average particle size DSi (1 nm to 1 μm) of the silicon particle as the electrode active material (C). The average particle size ratio L/DSi is 5 to 15,000. The electrode slurry can improve a discharge capacity and is useful for forming an electrode of a non-aqueous secondary battery (lithium-ion secondary battery) that can maintain a high discharge capacity after repeated charging and discharging.

公开(公告)号：US20210083275A1

公开(公告)日：2021-03-18

申请号：US16474594

申请日：2018-01-10

Applicant: Daicel Corporation ,  Daicel FineChem Ltd.

Inventor： Masao IWAYA ,  Shinya ONO ,  Naoki DOI

IPC: H01M4/38 ,  H01M4/133 ,  H01M4/134 ,  H01M4/66 ,  H01M4/04 ,  H01M4/1395 ,  H01M4/1393 ,  H01M10/0525

Abstract: An electrode slurry contains (A) a cellulose fiber and (C) an electrode active material, the electrode active material (C) contains at least a silicon particle and may contain a silicon particle and a carbonaceous particle. The slurry may further contain (B) a carboxymethyl-group-containing cellulose ether or a salt thereof. The average fiber length L (1 to 750 μm) of the cellulose fiber (A) is larger than the average particle size DSi (1 nm to 1 μm) of the silicon particle as the electrode active material (C). The average particle size ratio L/DSi is 5 to 15000. The electrode slurry can improve a discharge capacity and is useful for forming an electrode of a non-aqueous secondary battery (lithium-ion secondary battery) that can maintain a high discharge capacity after repeated charging and discharging.

公开(公告)号：US20190334175A1

公开(公告)日：2019-10-31

申请号：US16476929

申请日：2018-01-10

Applicant: DAICEL CORPORATION ,  DAICEL FINECHEM LTD.

Inventor： Masao IWAYA ,  Shinya ONO ,  Naoki DOI

IPC: H01M4/62 ,  H01M4/587 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/134

Abstract: An electrode slurry contains (A) a cellulose fiber, (B) a carboxymethyl-group-containing cellulose ether or a salt thereof, and a particulate material containing at least (C) an electrode active material, and the cellulose fiber (A) has an average fiber length of 1 to 750 μm. The amount of the carboxymethyl-group-containing cellulose ether or the salt thereof (B) is 0.1 to 3 parts by weight based on 100 parts by weight of the total amount of the cellulose fiber (A), the carboxymethyl-group-containing cellulose ether or the salt thereof (B), and the electrode active material (C), in terms of solid content. The present invention provides an electrode slurry that allows an improved surface smoothness (coating uniformity) of an electrode and an improved coating property, a process for producing the electrode slurry, an electrode, a process for producing the electrode, a non-aqueous secondary battery, and a lithium-ion secondary battery.