- Patent Title: All-solid-state secondary battery using polymer binder made from unsaturated carboxylic acid ester not having hydroxyl groups and compound having a teriary amine group and method of manufacturing same
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Application No.: US17599277Application Date: 2020-03-06
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Publication No.: US12218357B2Publication Date: 2025-02-04
- Inventor: Keigo Aso , Taira Ohashi , Motohisa Azechi , Daisuke Sukeguchi , Shingo Itai
- Applicant: ENEOS MATERIALS CORPORATION
- Applicant Address: JP Tokyo
- Assignee: ENEOS MATERIALS CORPORATION
- Current Assignee: ENEOS MATERIALS CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2019-066166 20190329
- International Application: PCT/JP2020/009664 WO 20200306
- International Announcement: WO2020/203042 WO 20201008
- Main IPC: H01M4/62
- IPC: H01M4/62 ; C08F220/18 ; H01M4/139 ; H01M10/0562
Abstract:
A binder for an all-solid-state secondary battery that can control a decrease in ionic conductivity, is excellent in binding properties and oxidation resistance, and can realize favorable cycle life characteristics even under a high voltage; and a binder composition for an all-solid-state secondary battery containing the binder. A binder for an all-solid-state secondary battery includes a polymer (A) which includes a repeating unit (a1) derived from an unsaturated carboxylic acid ester (excluding an unsaturated carboxylic acid ester having a hydroxyl group) and a repeating unit (a2) derived from a compound having a tertiary amino group, a weight-average molecular weight (Mw) of the polymer (A) being from 250000 to 3000000, and an endothermic peak being observed at −10° C. or lower when differential scanning calorimetry (DSC) is performed on the polymer (A) in accordance with JIS K 7121.
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