Kim, HS Ko, TK Na, BK Cho, WI Cho, BW 2024-01-21T06:06:20Z 2024-01-21T06:06:20Z 2021-09-04 2004-11-15 0378-7753 https://pubs.kist.re.kr/handle/201004/137057 LiCoO2, Mg-doped LiCoO2, and Zr doped LiCoO2, are manufactured by a sol-gel method, and are used as cathode active materials for lithium rechargeable batteries. The structural characteristics of the synthesized electrodes are analyzed by X-ray diffraction. The materials have a layered structure with the space gropu R (3) over barm of hexagonal systems. LiCoO2 prepared by sol-gel method shows a capacity decay over 4.3 V but LiCoO2 doped with Mg and Zr give an improvement in charge-discharge cycling performance. This effect may attribute to the fact that Mg2+ and Zr4+ ions have the same size as the Li+ ion and they locate at the inter-slab space. Therefore, they provide a pathway for the intercalation-deintercalation of Li+ during the charge and the discharge processes and prevent distortion of the structure. Also, the formation of a solid solution on the surface of the electrode acts as the buffer to phase transition and the structure becomes very stable. (C) 2004 Elsevier B.V All rights reserved. English ELSEVIER LICOO2 CATHODE LITHIUM BATTERIES INTERCALATION STABILITY CELL Electrochemical properties of LiMxCo1-xO2 [M = Mg, Zr] prepared by sol-gel process Article 10.1016/j.jpowsour.2004.06.024 1 JOURNAL OF POWER SOURCES, v.138, no.1-2, pp.232 - 239 JOURNAL OF POWER SOURCES 138 1-2 232 239 scie scopus 000225154600028 2-s2.0-8344239578 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article LICOO2 CATHODE LITHIUM BATTERIES INTERCALATION STABILITY CELL lithium rechargeable battery LiCoO2 cathode active material sol-gel method dopant magnesuim zirconium