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.