화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.11, No.4, 594-602, July, 2005
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Performance of Graphite Electrode Modified with Carbon Nanofibers for Lithium Ion Secondary Battery
Seung-Hwna Moon, Wen-Jie Jin, Taek-Rae Kim, Hyun-Sik Hahm, Byung-Won Cho1, and Myung-Soo Kim†
  • Department of Chemical Engineering, Myongji University, Kyunggido 449-728, Korea
  • 1Eco-Nano Research Center, KIST, Seoul 130-650, Korea
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The spherical natural graphite A and the heat-treated graphite B obtained at 1800 ℃ after pitch coating were used as anode base materials for a lithium ion secondary battery. Carbon nanofibers were incorporated into both graphite A and graphite B by mixing and ball milling. The effects that the carbon nanofiber content and ball milling have on the various electrochemical properties of the carbon nanofiber/graphite composite electrode (such as cyclic performance, charge/discharge capacity, and other electrochemical performances) were investigated. A portion of the graphite structure transformed from the hexagonal phase to the rhombohedral phase and the degree of graphitizatino increased after ball milling treatment, resulting in an increased charge/discharge capacity. The incorporation of a suitable amount of carbon nanofibers into the graphite electrode improved the cyclic performance as well as the initial charge/discharge capacity.
Keywords:lithium ion secondary battery;carbon nanofiber;graphite;ball milling;cyclic performance;charge/discharge capacity
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