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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 35, Number 11
BKCSDE 35(11)
November 20, 2014 

Mesoporous Carbon Additives for Long Cycle Life Sulfur Cathodes of Li-S Batteries
Jeong Yoon Koh, Tae Jeong Kim, Min-Sik Park, Eun Hee Kim, Seok Kim, Ki Jae Kim, Ji-Sang Yu, Young-Jun Kim*, Yongju Jung*
Mesoporous carbon additives, Li-S batteries, Cycling performance, Homogeneous distribution
We examine the potential use of disordered mesoporous carbon as a functional additive for confining dissolved Li-polysulfides and improving the cycling performance of Li-S batteries. To promote a better understanding of the correlation between the total pore volume of disordered mesoporous carbon and the cycling performance of Li-S batteries, a series of disordered mesoporous carbons with different total pore volumes are successfully synthesized using a commercial silica template. Based on the electrochemical and structural analyses, we suggest that the total pore volume of disordered mesoporous carbon is a predominant factor in determining its capability for either the absorption or adsorption of Li-polysulfides, which is primarily responsible for enhancing the cycling performance. The addition of disordered mesoporous carbon is also effective in enhancing the homogeneous distribution of active sulfur in the cathode, thereby affecting the cycling performance.
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