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http://dx.doi.org/10.4313/JKEM.2005.18.8.702

Effects on Electrochemical Performances of Conductive Agents with Different Particle Size in Spinel LiMn2O4 Cathode for Li-ion Batteries  

Lee, Chang-Woo (한국전기연구원 전지연구그룹)
Lee, Ml-Sook (한국전기연구원 전지연구그룹)
Kim, Hyun-Soo (한국전기연구원 전지연구그룹)
Moon, Seong-In (한국전기연구원 전지연구그룹)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.18, no.8, 2005 , pp. 702-707 More about this Journal
Abstract
Spinel $LiMn_2O_4$ has become appealing because manganese is inexpensive and environmentally benign. In general, cathodes for lithium ion batteries include carbon as a conductive agent that provides electron transfer between the active material and the current collector. In this work, we selected Acetylene Black and Super P Black as conductive agents, and then carried out their comparative investigation for the performances of the $Li/LiMn_2O_4$ cells using different conductive agents with different particle size. In addition, their electrochemical impedance characteristic of $Li/Mn_2O_4$ cells using different conductive agents is effectively identified through a.c. impedance technique. As a consequence, $Li/LiMn_2O_4$ cells with Super P Black show better electrochemical performances ascribed to the significant contribution of feasible ionic conduction due to larger particle size than those with Acetylene Black.
Keywords
Conductive agent; Particle size; Li-ion batteries;
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