Invention Grant
- Patent Title: Production method and production apparatus of electrode for secondary battery, electrode for secondary battery, and secondary battery
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Application No.: US15520249Application Date: 2015-08-24
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Publication No.: US10468662B2Publication Date: 2019-11-05
- Inventor: Masanori Hirai , Takashi Nakajima , Tetsuya Sato
- Applicant: NEC ENERGY DEVICES, LTD.
- Applicant Address: JP Sagamihara-shi, Kanagawa
- Assignee: Envision AESC Energy Devices Ltd.
- Current Assignee: Envision AESC Energy Devices Ltd.
- Current Assignee Address: JP Sagamihara-shi, Kanagawa
- Agency: Sughrue Mion, PLLC
- Priority: JP2014-214438 20141021
- International Application: PCT/JP2015/073737 WO 20150824
- International Announcement: WO2016/063612 WO 20160428
- Main IPC: H01M4/04
- IPC: H01M4/04 ; H01M10/04 ; H01M4/139 ; H01M10/0585

Abstract:
An electrode for a secondary battery including an electrode laminated assembly that has a configuration in which electrodes and a separator are laminated, includes current collector 3 and active material layer 2 formed on a surface of current collector 3. Active material layer 2 includes a thick-layer portion and a thin-layer portion that is positioned at an edge portion of the active material layer and that is smaller in thickness than the thick-layer portion, and is formed by discharging slurry containing an active material from discharge port 12a of die head 12 toward the surface of current collector 3, the slurry being supplied to die head 12 through coating valve 13. At the time of the formation of the thin-layer portion of active material layer 2, the slurry supplied through coating valve 13 having a smaller opening amount than at the time of the formation of the thick-layer portion is discharged toward current collector 3 from discharge port 12a that is closer to current collector 3 than at the time of the formation of the thick-layer portion.
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