Title:
安全性を向上させる非水電解液添加剤及びこれを含むリチウムイオン2次電池
Document Type and Number:
Japanese Patent JP3934557
Kind Code:
B2
Abstract:
The present invention relates to a non-aqueous electrolyte additive for improving safety and a lithium secondary battery comprising the same, and more particularly to a non-aqueous electrolyte additive that can improve cycle life and safety properties of a lithium ion secondary battery. According to the present invention, an organometallic compound represented by the Chemical Formula 1 is added to a non-aqueous electrolyte of a battery as an additive, and thus if a battery voltage is out of normal operation voltage range due to a short circuit and overcharge of a battery, etc., the non-aqueous electrolyte additive decomposes and a part of the decomposed additive polymerizes to form an insulating film on a cathode surface, and a part of the metal reacts with an insulating film formed on a cathode surface to improve thermal stability of the battery, thereby improving safety of the battery. Furthermore, in case of a short circuit a part of the metal oxide of the additive is removed an activity of lithium or is reduced movement speed of lithium by reacting with lithium rushed from an anode to a cathode, and thus safety of the battery can be obtained on a short circuit by delaying a flow of current.
Inventors:
Hong-Kyu Park
Choi-Won Choi
Yeon-Hee Lee
Yong-Tak An
Hyun-Jin Kim
Choi-Won Choi
Yeon-Hee Lee
Yong-Tak An
Hyun-Jin Kim
Application Number:
JP2002592222A
Publication Date:
June 20, 2007
Filing Date:
May 22, 2002
Export Citation:
Assignee:
LG HAUSYS,LTD.
International Classes:
H01M10/05; C07C317/00; C07F5/02; C07F5/06; C07F7/08; C07F7/22; C07F7/28; C07F11/00; C07F13/00; C07F15/02; C07F15/04; C07F15/06; H01M4/505; H01M4/525; H01M10/0525; H01M10/0567; H01M10/42; H01M6/10; H01M6/16
Domestic Patent References:
| JP2000182665A |
Attorney, Agent or Firm:
Masatake Shiga
Takashi Watanabe
Yasuhiko Murayama
Shinya Mitsuhiro
Takashi Watanabe
Yasuhiko Murayama
Shinya Mitsuhiro