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Amorphous SiO_2/C composite as anode material for lithium-ion batteries

机译：非晶态SiO_2 / C复合材料作为锂离子电池负极材料

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摘要

This work designed a facile preparation for an SiO2/C composite as the anode material for lithium ion battery. Both SiO2 and carbon are amorphous. SiO2 and carbon are mixed uniformly. The SiO2/C composite shows high specific capacity, cycle stability, and rate capability in lithium ion battery charge-discharge test. A stable reversible capacity of 1024 mA h/g at the current density of 100 mA/g is reached. The capacity retains 83% after 100 cycles. The uniform mixture of SiO2 and carbon leads to reduced volume change during the lithiation and delithiation of SiO2, together with the amorphous nature of SiO2 explains the high cycling stability. The carbon coating is a key factor for the high capacity and stability due to the increased electrical conductivity and reduced volume change. The resistance of the solid electrolyte interface film and charge transfer resistance of the SiO2/C composite are much smaller than those of pure carbon, which is a direct proof of the improved conductivity of the material by the carbon coating.
机译：这项工作设计了一种简便的制备方法，用于制备SiO2 / C复合材料作为锂离子电池的负极材料。 SiO2和碳都是无定形的。 SiO 2和碳均匀混合。 SiO2 / C复合材料在锂离子电池充放电测试中显示出高比容量，循环稳定性和倍率性能。在电流密度为100 mA / g时达到了1024 mA h / g的稳定可逆容量。 100次循环后容量保持83％。 SiO2和碳的均匀混合物导致SiO2的锂化和去锂化期间体积变化减小，并且SiO2的非晶态性质说明了高循环稳定性。由于增加的电导率和减少的体积变化，碳涂层是高容量和稳定性的关键因素。固体电解质界面膜的电阻和SiO2 / C复合材料的电荷转移电阻比纯碳小得多，这直接证明了碳涂层可提高材料的导电性。

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  • 来源
    《Journal of Materials Research》 |2018年第9期|1219-1225|共7页
  • 作者

    Cao Linmin; Huang Jilin; Lin Zhipeng; Yu Xiang; Wu Xiaoxian; Zhang Bodong; Zhan Yunfeng; Xie Fangyan; Zhang Weihong; Chen Jian; Meng Hui;

  • 作者单位

    Jinan Univ, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou Key Lab Vacuum Coating Technol & New En, Siyuan Lab,Dept Phys, Guangzhou 510632, Guangdong, Peoples R China;

    Jinan Univ, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou Key Lab Vacuum Coating Technol & New En, Siyuan Lab,Dept Phys, Guangzhou 510632, Guangdong, Peoples R China;

    Jinan Univ, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou Key Lab Vacuum Coating Technol & New En, Siyuan Lab,Dept Phys, Guangzhou 510632, Guangdong, Peoples R China;

    Jinan Univ, Instrumental Anal & Res Ctr, Guangzhou 510632, Guangdong, Peoples R China;

    Jinan Univ, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou Key Lab Vacuum Coating Technol & New En, Siyuan Lab,Dept Phys, Guangzhou 510632, Guangdong, Peoples R China;

    Jinan Univ, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou Key Lab Vacuum Coating Technol & New En, Siyuan Lab,Dept Phys, Guangzhou 510632, Guangdong, Peoples R China;

    Jinan Univ, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou Key Lab Vacuum Coating Technol & New En, Siyuan Lab,Dept Phys, Guangzhou 510632, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Instrumental Anal & Res Ctr, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Instrumental Anal & Res Ctr, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Instrumental Anal & Res Ctr, Guangzhou 510275, Guangdong, Peoples R China;

    Jinan Univ, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou Key Lab Vacuum Coating Technol & New En, Siyuan Lab,Dept Phys, Guangzhou 510632, Guangdong, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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