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In Situ Growth of SnO_2 on Graphene Nanosheets as Advanced Anode Materials for Rechargeable Lithium Batteries

机译:SnO_2在石墨烯纳米板上的原位生长作为可充电锂电池的高级阳极材料

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摘要

Graphene with a single layer of carbon atoms densely packed in a honeycomb crystal lattice is one of attractive materials for the intercalation of lithium ion, but it has low volumetric capacity owing to low tap density. We report a method for in situ growth of SnO_2 on graphene nanosheets (SGN) as anode materials for rechargeable lithium batteries. The results indicated that the SnC>2 nanoparticles with size in the range of 5-10 nm and a polycrystalline structure are homogeneously supported on graphene nanosheets. The charge and discharge capacities of SGN attained to 1559.7 and 779.7 mAh/g in the first cycle at a current density of 300 mA/g. The specific discharge capacities remained at 620 mAh·g~(-1) in the 200th cycle. The SGN exhibits a superior Li-storage performance with good cycle life and high capacity.
机译:具有单层碳原子的致密堆积在蜂窝状晶格中的石墨烯是用于嵌入锂离子的有吸引力的材料之一,但是由于低振实密度,其体积容量低。我们报告了在石墨烯纳米片(SGN)上作为可充电锂电池阳极材料的SnO_2原位生长的方法。结果表明,在石墨烯纳米片上均匀负载了尺寸为5-10nm且具有多晶结构的SnC 2纳米颗粒。在电流密度为300 mA / g的第一个循环中,SGN的充电和放电容量分别达到1559.7和779.7 mAh / g。在第200次循环中,比放电容量保持在620mAh·g〜(-1)。 SGN具有出色的锂存储性能,良好的循环寿命和高容量。

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  • 来源
  • 会议地点 Vancouver(CA);Vancouver(CA)
  • 作者单位

    Institute of Electrochemical and Energy Technology, Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;

    Institute of Electrochemical and Energy Technology, Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;

    Institute of Electrochemical and Energy Technology, Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;

    ARC Center of Excellence for Electromaterials Science, University of Wollongong,NSW 2522, Australia;

    ARC Center of Excellence for Electromaterials Science, University of Wollongong,NSW 2522, Australia;

    Institute of Electrochemical and Energy Technology, Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 独立电源技术(直接发电);
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