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首页> 外文期刊>Journal of power sources >One-pot synthesis of bicrystalline titanium dioxide spheres with a core-shell structure as anode materials for lithium and sodium ion batteries
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One-pot synthesis of bicrystalline titanium dioxide spheres with a core-shell structure as anode materials for lithium and sodium ion batteries

机译：一锅合成具有核-壳结构的双晶二氧化钛球体作为锂和钠离子电池的负极材料

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摘要

Bicrystalline titanium dioxide spheres (anatase@TiO_2(B) spheres) with enhanced electrochemical activity in lithium and sodium ion batteries have been successfully synthesized via a facile one-pot solvothermal method. The anatase@TiO_2(B) spheres have a core-shell structure with TiO_2(B) nanosheets sheathing the anatase TiO_2 sphere core which consists of nanopartides, as characterized by X-ray diffraction, scanning electron microscopy (SEM), and high-resolution transmission microscopy (HRTEM). The anatase@TiO_2(B) spheres show excellent lithium storage performance, which have high initial discharge capacity (114.8 mAh g~(-1)) with almost no capacity fading after 100 cycles and still maintain at 91.7 mAh g~(-1) after 375 cycles at a super-high current density of 5040 mA g~(-1) (30 C). What's more, they also show excellent rate capability in sodium ion batteries at various current densities ranging from 85 to 850 mA g~(-1). The unique hierarchical structure of anatase@TiO_2(B) spheres with excellent cycle performance and rate capability make a compelling case for their development as anode materials for both lithium and sodium ion batteries.
机译：通过简便的一锅溶剂热法成功地合成了在锂和钠离子电池中具有增强的电化学活性的双晶二氧化钛球体（锐钛矿@ TiO_2（B）球体）。锐钛矿@ TiO_2（B）球具有核-壳结构，其中的TiO_2（B）纳米片包裹着由纳米粒子组成的锐钛矿TiO_2球核，具有X射线衍射，扫描电子显微镜（SEM）和高分辨率的特征透射显微镜（HRTEM）。锐钛矿型TiO_2（B）球显示出优异的锂存储性能，具有高的初始放电容量（114.8 mAh g〜（-1）），经过100次循环后几乎没有衰减，并且仍保持在91.7 mAh g〜（-1） 375次循环后，电流密度为5040 mA g〜（-1）（30 C）。而且，它们在钠离子电池中在85至850 mA g〜（-1）的各种电流密度下也显示出出色的倍率能力。具有出色的循环性能和倍率性能的锐钛矿型TiO_2（B）球独特的层次结构使其成为锂和钠离子电池的负极材料成为有力的案例。

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  • 来源
    《Journal of power sources》 |2014年第10期|37-45|共9页
  • 作者

    Zichao Yan; Li Liu; Jinli Tan; Qian Zhou; Zhifeng Huang; Dongdong Xia; Hongbo Shu; Xiukang Yang; Xianyou Wang;

  • 作者单位

    Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University, Hunan, Xiangtan 411105, China;

    Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University, Hunan, Xiangtan 411105, China;

    Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University, Hunan, Xiangtan 411105, China;

    Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University, Hunan, Xiangtan 411105, China;

    Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University, Hunan, Xiangtan 411105, China;

    Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University, Hunan, Xiangtan 411105, China;

    Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University, Hunan, Xiangtan 411105, China;

    Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University, Hunan, Xiangtan 411105, China;

    Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University, Hunan, Xiangtan 411105, 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; Sodium ion batteries; Titanium dioxide; Bicrystalline hierarchical spheres; One-pot method;

    机译：锂离子电池;钠离子电池;二氧化钛;双晶分级球;一锅法;

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