• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electrochimica Acta >Construction of triple-layered sandwich nanotubes of carbon@mesoporous TiO2 nanocrystalline@carbon as high-performance anode materials for lithium-ion batteries
【24h】

Construction of triple-layered sandwich nanotubes of carbon@mesoporous TiO2 nanocrystalline@carbon as high-performance anode materials for lithium-ion batteries

机译：碳@中孔纳米晶型碳铝金三明治纳米管的施工作为锂离子电池的高性能阳极材料

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Triple-layered sandwich nanotubes of carbon@mesoporous TiO2 nanocrystalline@carbon were prepared through coating hydrous titania and resorcinol-formaldehyde resin on carbon nanotubes followed by controllable crystallization and carbonization. Material characterization indicated that TiO(2 )nanocrystalline with the size of 5-6 nm was uniformly assembled to the mesoporous sandwich layer of carbon nanotube-in-nanotube, leading to large specific surface area of 465.4 m(2) g(-1) and large pore volume of 0.695 ml g(-1). As anode material for lithium ion batteries, triple-layered sandwich nanotubes exhibited high lithium storage capacity (244 mAh g(-1) at 0.1C), good rate capability (115 mAh g(-1) at 5C), and excellent cycling stability (191 mAh g(-1) with coulombic efficiency of 100.2% was retained after 200 cycles at 0.2C, presenting 79% of capacity retention ratio). The superior lithium storage properties should be attributed to synergistic superiorities of TiO2 nanocrystalline, the mesoporous sandwich layer structure and carbon nanotube-in-nanotube. These unique structural characteristics effectively reduce Li(+ )diffusion length; enhances intercalation storage capability and pseudocapacitive interfacial storage capability of TiO2; provides sufficient space to accommodate volume variation of TiO2 nanocrystalline; increases electron conductivity and structure stability of TiO2. It is anticipated that the present triple-layered sandwich nanotube provides a unique carbon-based hybrid structure for other energy storage materials. (C) 2019 Elsevier Ltd. All rights reserved.
机译：通过在碳纳米管上涂覆含水二氧化钛和间苯二酚 - 甲醛树脂，然后可控结晶和碳化，制备碳@中孔TiO2纳米晶@碳的三层夹紧纳米丝碳。材料表征表明，尺寸为5-6nm的TiO（2）纳米晶体均匀地组装到碳纳米管内纳米管的中孔夹层层，导致465.4 m（2）g（-1）的大小表面积。大的孔体积为0.695ml g（-1）。作为锂离子电池的阳极材料，三层夹层纳米管呈现高锂储存容量（244mAhg（-1），0.1℃），良好的速率能力（5℃时115mAh（-1）），以及优异的循环稳定性（191 Mah G（-1）在0.2℃下200次循环后保留100.2％的库仑效率为100.2％，呈现79％的容量保持率）。优异的锂储存性能应归因于TiO2纳米晶，中孔夹层层结构和碳纳米管内纳米管的协同优越性。这些独特的结构特征有效降低Li（+）扩散长度;增强TiO2的嵌入储存能力和假偶联界面储存能力;提供足够的空间以适应TiO2纳米晶体的体积变化;增加TiO2的电子电导率和结构稳定性。预计本三层夹层纳米管为其他能量储存材料提供独特的碳基混合结构。 （c）2019 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号