SULFUR ELECTRODE FOR POSITIVE ELECTRODE OF LITHIUM SECONDARY BATTERY AND PREPARATION METHOD THEREOF
摘要
PURPOSE: A sulfur electrode for the positive electrode of a lithium secondary battery and its preparation method are provided to improve the lifetime of a positive electrode by employing sulfur as a lubricant. CONSTITUTION: The method comprises the steps of ball-milling sulfur powder as a lubricant and carbon powder and nickel powder as a conductive material for 12 hours or more under the inert atmosphere to mix them; adding the mixture and a binder to a solvent and stirring the solution to prepare slurry; and drying the slurry to prepare a sulfur positive electrode. The content of the sulfur powder is 10-90 wt% and the content of the nickel powder is 10-30 wt% based on the total weight of the sulfur electrode. Preferably the slurry comprises further a lithium salt and the lithium salt is LiCF3SO3. The nickel powder has a particle size of 30 micrometers or less, and preferably 0.1-10 micrometers. The solvent is preferably N-methyl-2-pyrrolidone.
申请公布号
KR20020084618(A)
申请公布日期
2002.11.09
申请号
KR20010024057
申请日期
2001.05.03
申请人
KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
发明人
AHN, HYO JUN;HAN, SANG CHEOL;KANG, YONG MUK;KIM, GI TAE;KIM, HYEON SEOK;LEE, HO;LEE, JAE YEONG;LEE, SANG MIN;PARK, JEONG GEON