Studies on heat-treated MPCF anodes in Li ion batteries |
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Authors: | Woo-Seong KimKwang-il Chung Chae-Bong LeeJung-Hwan Cho Yung-Eun SungYong-Kook Choi |
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Institution: | a Department of Chemistry and RRC/HECS, Chonnam National University, Kwangju, 500-757, South Korea b Department of Materials Science and Engineering, K-JIST, Kwangju, 500-712, South Korea c AnyCell Inc. R&D center, Kwangju, 506-258, South Korea |
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Abstract: | The intercalation/deintercalation of lithium ions into the heat-treated mesophase pitch-based carbon fibers (MPCF) was carried out in 1 M LiPF6-ethylene carbonate (EC)/diethyl carbonate (DEC) (1:1, volume ratio) solution at room temperature. LiC6 became incorporated into the heat-treated MPCF via an Li+ intercalation process. The transition stage was observed by a charge-discharge curve, impedance spectrum, and X-ray diffraction (XRD) spectrum. From the observed results, we conclude that the initial intercalation of lithium ions proceeds not by a reversible pathway, but rather, an irreversible path. From the deintercalation to the continuous cycles the lithium ion is intercalated and deintercalated via a reversible pathway. |
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Keywords: | Heat-treated MPCF anodes Li ion batteries |
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