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Title page for etd-0216117-110917


URN etd-0216117-110917 Statistics This thesis had been viewed 613 times. Download 0 times.
Author Hao-Ting Peng
Author's Email Address No Public.
Department Chemical Engineering
Year 2016 Semester 1
Degree Master Type of Document Master's Thesis
Language zh-TW.Big5 Chinese Page Count 100
Title Li4Ti5O12/C composite anode materials for lithium-ion batteries
Keyword
  • Lithium-ion batteries
  • Lithium-ion batteries
  • Abstract In this study, Li4Ti5O12/C composites were successfully synthesized via one step (LTO/C-O) and two step (LTO/C-3T) route, in which citric acid was used as carbon source. The structure, surface morphology and composition were characterized by X-ray diffraction, scanning electronic microscopy, Raman scattering spectroscopy, and transmission electron microscopy. The electrochemical properties of the samples were examined by using the charge/discharge tests, and electrochemical impedance spectroscopy. It was found that one step method (LTO/C-O) can reduced the particle size and uniformly coated carbon layer compared with two step method (LTO/C-T). The discharge capacity retention of LTO/C-3O sample at 1, 5, 10 and 20 C compared to the 0.1C delivered 95.9 %、90.9 %、87.9 % and 80.9 %,In contrast, LTO/C-3T sample only delivered 94.7 %、79.9 %、68.2 % and 50.1 %. However, the excess amount of carbon did not effectively improve the electronic conductivity, ascribing the presence of Ti4+/Ti3+ mixed valence decreased within LTO/C-O and LTO/C-T samples. The discharge capacity retention of LTO/C-7O sample at 1, 5, 10 and 20 C compared to the 0.1C only delivered 94 %、82.5 %、72.2 % and 52.6 %, which is lower than that of LTO/C-3O sample.
    Advisor Committee
  • Jeng-Yu Lin - advisor
  • Chien-Min Chang - co-chair
  • Yi Hu - co-chair
  • Files indicate in-campus access at 3 years and off-campus access at 3 years
    Date of Defense 2017-01-20 Date of Submission 2017-02-16


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