Lg Chem, Ltd

Sun-Ju Park

Pil-Kyu Park

Cha-Hun Ku

Sook Yun

Vin-Na Jo

The present disclosure relates to an electrochemical device and a battery module having improved anti-vibration. In the electrochemical device and the battery module according to one embodiment of the present disclosure which are mounted in electrically powered tools or other equipments, tap holders for providing vibration-resistance are provided on the outer surface of a cathode tap or an anode tap exposed to the outside of the electrochemical device or the battery module, thereby dispersing external force applied to the cathode tap or the anode tap to prevent the cathode tap or the anode tap from being damaged, and immobilizing the cathode tap or the anode tap to prevent an external short circuit, and eventually to improve the stability of the electrochemical device and the battery module.

Electrochemical device and battery module having improved vibration-resistance

The present disclosure refers to a lithium secondary battery comprising LiNiOin a cathode active material so as to improve the phenomenon that the capacity retention ratio decreases at initial cycles when using an anode active material selected from the group consisting of Si, SiC, SiO(0&#x3c;x&#x3c;2), Sn, SnO, Sb, Ge and a mixture thereof. The lithium secondary battery according to the present disclosure can substantially improve the decrease of a capacity retention ratio during initial cycles.

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Daejeon, South Korea

Sun-Ju Park