https://scholars.lib.ntu.edu.tw/handle/123456789/75799
標題: | Electrochemical characterization with homopolymer of 2-propen-1-amine coating on artificial graphite/carbon/silicon composites as anode materials for lithium ion batteries | 作者: | Yeh, Tzoo-Shing Wu, Yu-Shiang Lee, Yuan-Haun |
關鍵字: | Anode materials; Composite; Cycling stability; Lithium-ion batteries | 公開日期: | 2012 | 起(迄)頁: | 90-95 | 來源出版物: | Journal of Alloys and Compounds | 摘要: | This study reports the coating of spherical artificial graphite/disordered carbon/silicon (AG/C/Si) with a homopolymer of 2-propen-1-amine (PAA) layer. Transmission electron microscopy (TEM) observations clearly showed that the surface of the particle was coated with an amorphous layer of PAA-coated AG/C/Si composites. The resulting PAA-coated AG/C/Si electrode structure did not destroy locally because of large volume change. For both charge and discharge at 0.1 C, the PAA-coated AG/C/Si yielded the first columbic efficiency of approximately 89.1% and the first irreversible capacity decreased from 95.1 to 55.0 mAh g -1. Moreover, the discharge capacity was 410.1 mAh g -1 after 50 cycles, and its capacity retention increased to 91.5%. The addition of PAA decreased the specific surface area (BET) of the AG/C/Si composites and reduced the direct contact between the anode electrode surface and the electrolyte. These results indicate that PAA-coated AG/C/Si composites have relatively lower electrochemical resistance and favorable cycling stability. © 2011 Elsevier B.V. All rights reserved. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/243615 | DOI: | 10.1016/j.jallcom.2011.11.089 | SDG/關鍵字: | Amorphous layer; Anode electrodes; Anode material; Capacity retention; Charge and discharge; Columbic efficiency; Composite; Cycling stability; Direct contact; Discharge capacities; Electrochemical characterizations; Electrochemical resistance; Electrode structure; Irreversible capacity; Lithium-ion battery; Volume change; Anodes; Characterization; Coatings; Lithium; Lithium alloys; Lithium batteries; Lithium compounds; Nanocomposite films; Organic compounds; Surfaces; Transmission electron microscopy; Electric discharges |
顯示於: | 材料科學與工程學系 |
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