Samsung Sdi Co., Inc.

Bongchull Kim

Dongwoo Kim

Seho Park

Jangho Lee

Jaehou Nah

Hayoung Lee

Cheolhee Hwang

Dongyung Kim

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&#x2dc;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.

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

An anode for a lithium rechargeable battery includes an active material layer that includes a metal-carbon composite active material including a carbonaceous active material and at least one active material selected from the group consisting of a metal or a metal oxide, graphite particles having surfaces that are coated or partially coated with a resin f, and a binder that binds and fixes the active material particles and the graphite particles to each other. The anode further includes a collector on which the active material layer is disposed. The resin-coated graphite particles maintain multiple conductive contact surfaces between the active material particles due to adhesiveness of the resin even when the volume of the metal-carbon composite active material particles is changed during charging and discharging, and prevent a reduction of the battery capacity and improve the lifetime of the battery.

Anode for a lithium rechargeable battery and lithium rechargeable battery using the same

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Yongin-si, South Korea

Bongchull Kim