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Rodlike SnO_2/graphene nanocomposite and its application for lithium-ion batteries

机译:棒状SnO_2 /石墨烯纳米复合材料及其对锂离子电池的应用

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摘要

Rodlike SnO2/graphene nanocomposite is prepared through a simple hydrothermal method followed by a subsequent calcination process. The SEM images show that the resulting composite possesses a rodlike structure with a diameter of 100-200 nm and length of 5-10um. Through further TEM analysis, we found that the rods are composed of SnO2 nanoparticles in 5-10 nm and graphene sheets in 2-5layers. This unique structure can not only effectively alleviate the volume expansion, but also greatly improve the rate performance of the material. As a result, the obtained composite shows a reversible capacity of 675.8 mAh.g(-1) after 100 cycles at a current density of 500 m A.g(-1). Increasing the current densities to 1000 m A.g(-1) and 2000 mAg(-1), the composite can still maintain 655.6 mAh.g(-1) and 601.5 mAh.g(-1) respectively, which indicate that the rodlike SnO2/graphene composite reported in this paper is a promising anode material for lithium-ion batteries. (C) 2021 Elsevier B.V. All rights reserved.
机译:通过简单的水热法制料,然后进行随后的煅烧过程制备棒状SnO2 /石墨烯纳米复合物。 SEM图像表明所得复合材料具有直径为100-200nm和长度为5-10um的棒状结构。通过进一步的TEM分析,我们发现杆由5-10nm和2-5层的石墨烯片中的SnO2纳米颗粒组成。这种独特的结构不仅可以有效地减轻体积扩展,而且大大提高了材料的速率性能。结果,在电流密度为500m Ag(-1)的100次循环之后,所得复合材料显示出675.8mAh.g(-1)的可逆容量。将电流密度增加到1000 m%(-1)和2000mag(-1),复合材料仍然可以保持655.6mAh.g(-1)和601.5mah.g(-1),这表明棒状SnO2 /石墨烯复合材料报道本文是用于锂离子电池的有前途的阳极材料。 (c)2021 Elsevier B.v.保留所有权利。

著录项

  • 来源
    《Materials Letters》 |2021年第1期|129765.1-129765.4|共4页
  • 作者单位

    Dezhou Univ Sch Energy & Mech Engn Dezhou 253023 Peoples R China;

    Dezhou Univ Expt Management Ctr Dezhou 253023 Peoples R China;

    Dezhou Univ Sch Energy & Mech Engn Dezhou 253023 Peoples R China;

    Dezhou Univ Sch Energy & Mech Engn Dezhou 253023 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

    Energy storage and conversion; Carbon materials; Nanocomposites; Lithium-ion batteries; Graphene;

    机译:储能和转化;碳材料;纳米复合材料;锂离子电池;石墨烯;

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