空心二氧化锡/碳复合空球作为钠离子电池负极材料的研究

Research on hollow SnO_2/carbon composite hollow spheres as anode material of sodium ion battery

本文提出了使用简单的单分散聚苯乙烯(PS)球体为模板,制备具有良好电化学性能的钠离子电池的负极材料——二氧化锡和碳复合空心球(SnO_2@C)。该结构由被封装在碳薄层的金属氧化物纳米颗粒组成,不易破碎,且具有较高容量与导电性。对其进行的电化学测试表明,构造金属氧化物/碳复合材料的空心结构得到的钠离子电池负极材料在获得容量提升的同时也具有良好的循环稳定性。

In this paper,monodispersed polystyrene(PS)spheres are synthesized and used as templates to prepare tin oxide and carbon composite hollow sphere(SnO2@C)for sodium ion batteries with improved electrochemical performance.The structure is composed of tin oxide nanoparticles encapsulated in carbon thin layer,with good structural integrity.Such composite anode demonstrates enhanced sodium storage ability with high capacity and good cyclic stability according to corresponding electrochemical tests.