Invention Grant
- Patent Title: Densified battery electrodes with electrode parts having different porosities and methods thereof
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Application No.: US16883661Application Date: 2020-05-26
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Publication No.: US11594718B2Publication Date: 2023-02-28
- Inventor: Gleb Yushin , Gene Berdichevsky
- Applicant: Sila Nanotechnologies Inc.
- Applicant Address: US CA Alameda
- Assignee: Sila Nanotechnologies Inc.
- Current Assignee: Sila Nanotechnologies Inc.
- Current Assignee Address: US CA Alameda
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- Agent Daniel Podhajny
- Main IPC: H01M4/133
- IPC: H01M4/133 ; H01M10/0525 ; H01M4/134 ; H01M4/04 ; H01M4/38 ; H01M4/36 ; H01M4/587 ; H01M4/02

Abstract:
In an aspect, a Li-ion cell may comprise a densified electrode exhibiting an areal capacity loading of more than about 4 mAh/cm2. For example, the densified electrode may a first electrode part arranged on a current collector and a second electrode part on top of the first electrode part, the second electrode part of the at least one densified electrode having a higher porosity than the first electrode part of the at least one densified electrode. In some designs, the densified electrode may be fabricated by densifying electrode layers via a pressure roller while maintaining a contacting part of the pressure roller at a temperature that is less than a temperature of the second electrode part. In some designs, the applied pressure is a time-varying (e.g., frequency modulated) pressure. In some designs, a drying time for a slurry to produce the densified electrode may range from around 1-120 seconds.
Public/Granted literature
- US20200373555A1 DENSIFIED BATTERY ELECTRODES AND METHODS THEREOF Public/Granted day:2020-11-26
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