摘要
目的:为缓解电池容量衰减,提升电池循环稳定性,通过制备不同形貌及结构的MoSe_(2)得到优异的钠离子电池。方法:利用溶剂热和高温煅烧法,通过控制煅烧时间,制备不同形貌的MoSe_(2)。并利用纳米花活性材料中,超薄纳米片具有高表面活性位点的原理,提高电极材料与电解液的接触面积,增强钠离子的可逆脱嵌反应,从而获得稳定的电池循环性能。结果:所有制备的样品中,所得超薄纳米片自组装的MoSe_(2)纳米花,电池循环性能最佳:在500 mA/g电流密度下循环200圈后容量仍可保持在362 mAh/g,每圈的衰减率仅0.06%。结论:所制备的MoSe_(2)纳米花可作为循环稳定性能优异的钠离子电池负极材料,为后续研究提供依据。
Objective: To reduce battery capacity attenuation and improve battery circle stability, MoSe_(2)with different morphalogy was and stnceture was prepared to obtain better performance of sodium ion battery.Methods: MoSe_(2)nanomaterials with different morphology were prepared by solvothermal and high temperature calcination method within controlling calcination time. In addition, the ultra-thin nanosheets in nanoflowers have high surface active sites, which can improve the contact area between electrode materials and electrolyte and enhance the reversible insertion/extraction reaction of sodium ions, thus obtaining stable battery cycling performance. Results: Among all the samples, the MoSe_(2)nanoflowers self-assembled by ultrathin nanosheets have the best stability performance, at the current density of 500 mA/g, the capacity can still be maintained at 362 mAh/g after 200 cycles, and the attenuation rate of each cycle is only 0.06%. Conclusion: The ultrathin MoSe_(2)nanoflowers prepared by this method can be used as the anode material for sodium ion batteries with excellent cycling stability, which provides basis for subsequent research.
作者
范小轩
牛斐洱
陈婷凤
侯青利
FAN Xiaoxuan;NIU Feier;CHEN Tingfeng;HOU Qingli(College of Chemistry and Materials Engineering,Anhui Science and Technology Uniuarsity,Fengyang 233100,China)
出处
《安徽科技学院学报》
2021年第5期107-111,共5页
Journal of Anhui Science and Technology University
基金
安徽省大学生创新创业训练计划项目(S202010879141)。