Journal
SOLID STATE IONICS
Volume 180, Issue 9-10, Pages 698-702Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2009.03.008
Keywords
Conductive additives; Mesoporous carbon; Cathode; LiCoO2; Lithium ion battery
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Funding
- Key Science Research Plan of China [2006CB932703]
- Knowledge Innovation Program of Chinese Academy of Sciences [KJCX2-YW-M01]
- Research Developing Plan of Lanzhou University of Technology [SB05200902]
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Binary conductive additives (BCA), formed by sonication of mesoporous carbon (MC) and acetylene black (AB), were used as conductive additives to improve the electrochemical performance of a LiCoO2 composite cathode. The electrochemical performance of the LiCoO2 composite cathode dispersed with BCA was investigated. The results showed that the electrochemical performance (including the discharge capacity, the discharge voltage and the total internal resistance) of a BCA loaded LiCoO2 composite cathode was better than that of a cathode loaded with AB. The possible mechanism is that the MC in BCA can adsorb and retain electrolyte solution, which allows an intimate contact between the lithium ions and the cathode active material LiCoO2 due to its large mesopore specific surface area, A simplified model was also proposed. (c) 2009 Elsevier B.V. All rights reserved.
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