二维互连碳纳米笼的制备与锌-碘电池应用
Preparation of two-dimensional interconnected carbon nanocages and its application in zinc-iodine batteries
以氧化石墨烯为原材料,通过引入Fe-Ni合金催化剂,在高温催化石墨化作用下制备了二维互连碳纳米笼。通过透射电子显微镜(TEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)和拉曼光谱对其结构与成分进行分析,结果表明二维互连碳纳米笼具有丰富的空腔和缺陷结构,并掺杂了少许N原子。通过吸附碘作为正极组装锌-碘电池,利用循环伏安法对其电化学动力学研究表明,电池材料呈现出快速电化学响应特征,在20 mV/s的扫速下,其表面电化学反应过程贡献的电荷占比高达67.0%。充放电测试显示其在2 mA/g的电流密度下具有约185.8 mAh/g的比容量。二维互连碳纳米笼材料在锌-碘电池方面具有良好的应用效果。
Two-dimensional interconnected carbon nanocages are synthesized via high-temperature catalytic graphitization using graphene oxide as the precursor and Fe-Ni alloy as the catalyst.Structural and compositional analysis conducted by TEM,XRD,XPS,and Raman spectroscopy reveals that the 2D-interconnected carbon nanocages possess abundant cavities,defect-rich architectures,and trace doped nitrogen atoms.As the 2D-interconnected carbon nanocages are employed as iodine host materials to fabricate zinc-iodine batteries,electrochemical kinetics evaluated by cyclic voltammetry demonstrates rapid charge-transfer characteristics,with a surface-controlled charge contribution of 67.0% at a scan rate of 20 mV/s.It is indicated through galvanostatic charge/discharge tests that the material exhibits a specific capacity of about 185.8 mAh/g at a current density of 2 mA/g.The prepared 2D-interconnected carbon nanocages demonstrate a promising potential as an advanced cathode host material for high-performance zinc-iodine batteries.
催化石墨化 / 锌-碘电池 / 电化学动力学 / 二维互连碳纳米笼
catalyzing graphitization / zinc-iodine batteries / electrochemical kinetics / 2D-interconnected carbon nanocages
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山西工学院高层次人才科研启动项目(013013)
山西工学院高层次人才科研启动项目(013017)
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