Lg Chem, Ltd

Lg Energy Solution, Ltd.

Hee Won Lee

Jung Pil Lee

Je Young Kim

Jun Hyuk Song

Joo Sung Lee

Suk In Noh

Jimin Kim

Inho Jeon

A method of recovering a used battery and apparatus for recovering the capacity of a secondary battery comprising: (1) preparing a secondary battery with deteriorated lifespan characteristics; (2) heating the secondary battery with deteriorated lifespan characteristics while pressing the secondary battery with deteriorated lifespan characteristics to compress a positive electrode, negative electrode, or separator included in the secondary battery; and (3) charging/discharging the secondary battery with deteriorated lifespan characteristics, the secondary battery having been pressed and heated, and the secondary battery with deteriorated lifespan characteristics may be charged and discharged while being pressed and heated, thereby exhibiting an effect of recovering the capacity of the secondary battery with deteriorated lifespan characteristics.

Method of recovering capacity of a used battery and a secondary battery capacity recovery apparatus

The present invention relates to a negative electrode and a secondary battery including the same, and particularly, to a negative electrode which includes a current collector; a first active material layer disposed on the current collector and including at least one concave portion exposing a portion of the current collector; a stress-relaxing portion disposed in the concave portion; and a second active material layer disposed on the first active material layer and the stress-relaxing portion and separated from the current collector, and a secondary battery including the same.

Negative electrode and secondary battery including the same

The present invention relates to a secondary battery comprising: an electrode assembly; and a thermal contractible protection layer disposed on an outer surface of the electrode assembly and contracted by heat.

Secondary battery

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Daejeon, South Korea

Hee Won Lee