牺牲棉纤维模板法制备褶皱状SnO_2负极材料及其电化学性能

Synthesis of Corrugated SnO_2 by Cotton Fibers Template Method and Its Electrochemistry Performance

以棉纤维作为模板，制备褶皱层状SnO2。通过XRD、SEM、TEM、CV、恒流充放电、EIS等测试手段对材料结构、形貌和电化学性能进行了表征。结果表明：产物具有由粒径16～21nm的SnO2纳米颗粒构成的褶皱状形貌。电化学测试表明该材料在电流密度70mA／g时循环50次后放电比容量仍高达614mAh／g，甚至在电流密度为3000mA／g时放电比容量仍达到405mAh／g，表现出优异的循环性能和倍率性能。

Corrugated SnOz was prepared by an effective template using cotton fibers which were sacrificed during preparation. The as-prepared SnO2 samples were characterized by XRD, SEM, TEM, CV, galvanostatical method and EIS. The results show that the corrugated SnO2 is composed of nanopaticles with size of 16-21 nm. The as-obtained corrugated SnO2 electrodes can deliver a discharge capacity of 614 mAh/g at current density of 70 mA/g after 50 cycles. Even at the current density of 3 A/g the products can still deliver a high reversible discharge capacity of 405 mAh/g. As lithium storage materials, the corrugated SnO2 shows stable cyclability and good rate capability.