材料科学
石墨烯
纳米复合材料
复合数
阳极
锂(药物)
煅烧
电流密度
化学工程
纳米颗粒
离子
热液循环
纳米技术
复合材料
电极
催化作用
物理化学
内分泌学
工程类
物理
化学
医学
量子力学
生物化学
作者
Qiwei Tang,Li Wang,Xiaoxuan Ma,Min Li
标识
DOI:10.1016/j.matlet.2021.129765
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.
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