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Facile synthesis of porous Fe2TiO5 microparticulates serving as anode material with enhanced electrochemical performances

机译：适合多孔Fe2TiO5微氨酸盐作为具有增强电化学性能的阳极材料的合成

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摘要

Porous iron titanium oxide (Fe2TiO5) microparticulates have been successfully synthesized via a facile hydrothermal route followed by a subsequent calcination process. Polyvinyl-pyrrolidone (PVP), serving as a surfactant, played a pivotal role in controlling the size and inducing the mesoporous structure of Fe2TiO5. The measured specific surface area is 83.1 m(2) g(-1) and the dominant pore size is ca. 10 nm. When tested as the anode material of lithium-ion batteries (LIBs), the as-prepared porous Fe2TiO5 microparticulates delivered a high reversible capacity of 468.3 mA h g(-1) after 100 cycles at a current density of 100 mA g(-1), which nearly quadrupled that of porous TiO2 microspheres and doubled that of Fe2O3 nanoparticles. Moreover, the porous Fe2TiO5 microparticulates also showed more superior rate capability and long-term cycling stability with respect to TiO2 and Fe2O3 samples. Even after the rate performance test, a high discharge capacity of 234.1 mA h g(-1) was still maintained at a current density of 500 mA g(-1) over another 250 cycles. The improved electrochemical performances are mainly attributed to the synergistic effect of TiO2 and Fe2O3 in Fe2TiO5, as well as the mesoporous structure.
机译：多孔铁氧化钛（Fe2TiO5）微氨酸通过容易水热的途径成功地合成，然后成功地合成了随后的煅烧过程。用作表面活性剂的聚乙烯醇 - 吡咯烷酮（PVP）在控制尺寸和诱导Fe2tio5的中孔结构方面发挥了枢转作用。测量的比表面积为83.1米（2）G（-1），优势孔径为约。 10纳米。当测试为锂离子电池（LIBS）的阳极材料时，在100mA g（-1）的电流密度为100次循环后，微氨酸盐在100 mA g（-1）的循环后，微氨酸盐在100mA循环后，微氨酸盐递送了468.3mA Hg（-1）的高可逆容量，这几乎二次多叠多孔的微球和Fe2O3纳米颗粒的增加。此外，多孔Fe2TiO5微氨酸还显示出更优异的速率能力和相对于TiO 2和Fe 2 O 3样品的长期循环稳定性。即使在速率性能测试之后，高放电容量仍然在另一个250个循环上以500mA g（-1）的电流密度保持在电流密度。改善的电化学性能主要归因于TiO2和Fe2O3在Fe2TiO5中的协同作用，以及中孔结构。

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  • 来源
    《RSC Advances》 |2015年第126期|共9页
  • 作者

    Guo Shimei; Wang Shenyu; Wu Nannan; Liu Jiurong; Ni Yuxing; Liu Wei;

  • 作者单位

    Shandong Univ Minist Educ Key Lab Liquid Solid Struct Evolut &

    Proc Mat Jinan 250061 Shandong Peoples R China;

    Shandong Univ Minist Educ Key Lab Liquid Solid Struct Evolut &

    Proc Mat Jinan 250061 Shandong Peoples R China;

    Shandong Univ Minist Educ Key Lab Liquid Solid Struct Evolut &

    Proc Mat Jinan 250061 Shandong Peoples R China;

    Shandong Univ Minist Educ Key Lab Liquid Solid Struct Evolut &

    Proc Mat Jinan 250061 Shandong Peoples R China;

    Shandong Univ State Key Lab Crystal Mat Jinan 250100 Shandong Peoples R China;

    Shandong Univ State Key Lab Crystal Mat Jinan 250100 Shandong Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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