淡江大學機構典藏:Item 987654321/121836
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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/121836


    Title: Polyimide-derived carbon-coated Li4Ti5O12 as high-rate anode materials for lithium ion batteries
    Authors: Hsu, Shih-Chieh;Huang, Tzu-Ten;Wu, Yen-Ju;Lu, Cheng-Zhang;Weng, Huei Chu;Huang, Jen-Hsien;Cai-Wan, Chang-Jian;Liu, Ting-Yu
    Keywords: Li4Ti5O12;polyimide;carbon coating;lithium ion battery;rate performance
    Date: 2021-05-21
    Issue Date: 2022-01-04 12:11:21 (UTC+8)
    Abstract: Carbon-coated Li4Ti5O12 (LTO) has been prepared using polyimide (PI) as a carbon source via the thermal imidization of polyamic acid (PAA) followed by a carbonization process. In this study, the PI with different structures based on pyromellitic dianhydride (PMDA), 4,4′-oxydianiline (ODA), and p-phenylenediamine (p-PDA) moieties have been synthesized. The effect of the PI structure on the electrochemical performance of the carbon-coated LTO has been investigated. The results indicate that the molecular arrangement of PI can be improved when the rigid p-PDA units are introduced into the PI backbone. The carbons derived from the p-PDA-based PI show a more regular graphite structure with fewer defects and higher conductivity. As a result, the carbon-coated LTO exhibits a better rate performance with a discharge capacity of 137.5 mAh/g at 20 C, which is almost 1.5 times larger than that of bare LTO (94.4 mAh/g).
    Relation: Polymers 13(11), 1672
    DOI: 10.3390/polym13111672
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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