Invention Grant
- Patent Title: Negative electrode for lithium rechargeable battery and lithium rechargeable battery adopting the same
- Patent Title (中): 锂可充电电池负极和采用相同的锂可充电电池
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Application No.: US12256304Application Date: 2008-10-22
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Publication No.: US08974966B2Publication Date: 2015-03-10
- Inventor: Bongchull Kim , Jangho Lee , Dongwoo Kim , Hayoung Lee
- Applicant: Bongchull Kim , Jangho Lee , Dongwoo Kim , Hayoung Lee
- Applicant Address: KR Suwon-si, Gyeonggi-do
- Assignee: Samsung SDI Co., Ltd.
- Current Assignee: Samsung SDI Co., Ltd.
- Current Assignee Address: KR Suwon-si, Gyeonggi-do
- Agency: Knobbe Martens Olson & Bear LLP
- Priority: KR10-2007-0106596 20071023
- Main IPC: H01M4/38
- IPC: H01M4/38 ; H01M4/48 ; H01M2/02 ; H01M4/587 ; H01M4/36 ; H01M4/485 ; H01M10/0525

Abstract:
A negative electrode for a lithium rechargeable battery comprising: active material layers including metal-carbon combination active material particles including at least one active material selected from metal or metal oxide and carbonaceous active material, soft graphite particles, and a binder for binding the metal-carbon combination active material particles and the soft graphite particles; and a current collector on which surface the active material layers are stacked, wherein the soft graphite particles have a pellet density of 1.6˜1.9 g/cc when a pellet is formed at a press pressure of 1 ton/cm2, and the lithium rechargeable battery adopting the negative electrode.Soft graphite is used as a shock absorbing material when the bulk of the metal-carbon combination active material particles expands by the charging of the battery, which inhibits the expansion of bulk in the active material layer as a whole, maintains and attains a conductive contact point between the active material particles including the soft graphite particles, thereby preventing degradation of capacity due to a repetition of the charging and discharging of the battery and increasing the lifetime cycle of the battery.
Public/Granted literature
- US20090104519A1 NEGATIVE ELECTRODE FOR LITHIUM RECHARGEABLE BATTERY AND LITHIUM RECHARGEABLE BATTERY ADOPTING THE SAME Public/Granted day:2009-04-23
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