Invention Grant
US08974966B2 Negative electrode for lithium rechargeable battery and lithium rechargeable battery adopting the same 有权
锂可充电电池负极和采用相同的锂可充电电池

Negative electrode for lithium rechargeable battery and lithium rechargeable battery adopting the same
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.
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