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    National Tsing Hua University Institutional Repository > 研究中心 > 奈微與材料科技中心 > 期刊論文 >  Carbon nanobeads as an anode material on high rate capability lithium ion batteries

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/61611

    Title: Carbon nanobeads as an anode material on high rate capability lithium ion batteries
    Authors: Chang, Jian-Chia;Tzeng, Yu-Fen;Chen, Jin-Ming;Chiu, Hsin-Tien;Lee, Chi-Young
    教師: 李紫原
    Date: 2009
    Publisher: Elsevier
    Relation: ELECTROCHIMICA ACTA,Volume: 54,Issue: 27,Pages: 7066-7070,Published: NOV 30 2009
    Abstract: Carbon nanobeads (CNBs) were prepared by reacting cyclohexachlorobenzene with dispersed sodium metal at 200 degrees C for 4 h. The CNBs prepared in this manner formed uniform nanobeads, with sizes ranging from 100 to 300 nm. Heating resulted in a reduction in the size of the CNBs, and improvements in their degree of crystallinity. The nanosized carbon materials considerably increased the surface area of the powder, reducing the distance of the intercalation/deintercalation pathway, substantially improving the charge capacity of the lithium ion battery at a high charging rate. The charge capacity of CNBs was found to be 238 mAh g(-1), while that of commercial MCMB reached only 36 mAh g(-1), when the charging rate was 1C (372 mAh g(-1)). As the charging rate was further increased to 2C (744 mAh g(-1)) and 3C (1116 mAh g(-1)), the charge capacities of CNBs dropped to 173 and 111 mAh g(-1), respectively. The cyclic performance of the CNBs was measured and found to be significantly improved in comparison to other carbonaceous materials, for up to 100 cycles. Although cyclic performance did result in a gradual reduction in capacity, the CNBs still greatly exceeded the capacity of MCMB. These results clearly demonstrate the potential role of CNBs as anodes for high capacity Li ion batteries for use in the automobile industry.
    URI: http://www.elsevier.com/wps/find/homepage.cws_home
    Appears in Collections:[奈微與材料科技中心] 期刊論文

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