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首页> 外文期刊>Journal of power sources >Novel insights into the charge/discharge characteristics of spherical porous Li4Ti5O12 co-coated with carbon and metal
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Novel insights into the charge/discharge characteristics of spherical porous Li4Ti5O12 co-coated with carbon and metal

机译：对碳和金属共涂覆的球形多孔Li4Ti5O12的充电/放电特性的新颖见解

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摘要

The charge/discharge characteristics of metal (Cu or Ag) and carbon co-coating spherical porous Li4Ti5O12 are investigated in this paper. And the Li4Ti5O12/C-Ag presents the highest reversible capacity of 189.0 mAh g(-1) among the four samples of Li4Ti5O12, Li4Ti5O12/C, Li4Ti5O12/C-Cu and Li4Ti5O12/C-Ag. Furthermore, the charge/discharge tests of the Li4Ti5O12/C-Ag electrode without conductive carbon show low initial reversible capacity of 17.6 mAh g(-1) during charge -discharged at 0.1C (1C = 170 mA), suggesting that the conductive carbon is necessary for this kind of active material. The result also shows that a higher reversible capacity of about 110 mAh g(-1) can be obtained by decreasing the discharging current density to 0.005C. Based on the low bulk electronic conductivity of Li4Ti5O12 can be improved by lithium insertion, an improved charge -discharge method is developed by discharging the Li4Ti5O12/C-Ag electrode at 0.005C for 20 h to improve its electronic conductivity and further discharge at 0.1C to shorten the discharge time.(C) 2017 Elsevier B.V. All rights reserved.
机译：本文研究了金属（铜或银）和碳共涂覆球形多孔Li4Ti5O12的充放电特性。在Li4Ti5O12，Li4Ti5O12 / C，Li4Ti5O12 / C-Cu和Li4Ti5O12 / C-Ag的四个样品中，Li4Ti5O12 / C-Ag的可逆容量最高，为189.0 mAh g（-1）。此外，不含导电碳的Li4Ti5O12 / C-Ag电极的充电/放电测试显示，在0.1C（1C = 170 mA）充电时，初始可逆容量低，为17.6 mAh g（-1），这表明导电碳这种活性物质是必需的。结果还表明，通过将放电电流密度降低至0.005C，可以获得约110 mAh g（-1）的更高可逆容量。基于锂的嵌入可以改善Li4Ti5O12的低电子电导率，因此开发了一种改进的充放电方法，该方法是在0.005C的温度下将Li4Ti5O12 / C-Ag电极放电20 h，以提高其电导率，并在0.1C时进一步放电。 （C）2017 Elsevier BV保留所有权利。

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  • 来源
    《Journal of power sources》 |2017年第may1期|52-56|共5页
  • 作者

    Lu Mi; Yang Hang; Zhang Yong; Wang Guangjin; Zhuang Shuxin;

  • 作者单位

    Xiamen Univ Technol, Sch Mat Sci & Engn, Key Lab Funct Mat & Applicat Fujian Prov, Xiamen 361024, Peoples R China;

    Xiamen Univ Technol, Sch Mat Sci & Engn, Key Lab Funct Mat & Applicat Fujian Prov, Xiamen 361024, Peoples R China;

    Xiamen Univ Technol, Sch Mat Sci & Engn, Key Lab Funct Mat & Applicat Fujian Prov, Xiamen 361024, Peoples R China;

    Shanxi Inst Appl Phys Chem, Xian 710000, Peoples R China;

    Xiamen Univ Technol, Sch Mat Sci & Engn, Key Lab Funct Mat & Applicat Fujian Prov, Xiamen 361024, 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lithium ion batteries; Anode material; Li4Ti5O12; Surface coating; Charge-discharge mechanism;

    机译：锂离子电池;负极材料;Li4Ti5O12;表面涂层;充放电机理;

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