多孔碳化棉复合SnO2锂离子电池负极材料的制备及性能研究

Preparation and Property of Porous Carbonized Cotton Composite SnO2 Anode Material for Lithium-Ion Battery

以脱脂棉为原料通过Mg2+模板法获取多孔碳化棉结构,再通过水热法在其表面及内部孔隙负载SnO2颗粒,获得多孔碳化棉与SnO2颗粒的复合材料。利用扫描电子显微镜(SEM)、拉曼光谱、X射线衍射分析(XRD)分析材料的微观形貌,利用循环伏安(CV)和电化学阻抗(EIS)测试评价其作为锂离子电池负极材料的电化学性能。结果表明,通过Mg2+模板法获取负载有SnO2颗粒的多孔碳化棉结构作为负极材料时,在300 mA/g的电流密度下,其容量在100圈后仍维持在500 mAh/g,是一种前景较为理想的锂离子电池负极复合材料。

The porous carbonized cotton structure was obtained by Mg2+template method with absorbent cotton as raw material.The SnO2 particles were loaded on the surface and internal pores of the carbon fiber by hydrothermal method to obtain a composite material of porous carbonized cotton and SnO2 particles.The microscopic morphology of the material were analyzed by scanning electron microscope(SEM),Raman spectroscopy and X-ray diffraction analysis(XRD).Its electrochemical performance as a negative electrode material for lithium-ion batteries were evaluated by cyclic voltammetry(CV)and electrochemical impedance(EIS)tests.The results show that the porous carbonized cotton structure loaded with SnO2 particles obtained by the Mg2+template method can be used as the anode material,whose capacity remains at 500 mAh/g after 100 cycles at a current density of 300 mA/g.The composite material is a promising material for lithium-ion battery anode.