采用静电纺丝法以低分子量聚乙烯吡咯烷酮(PVP,K30)为聚合物增稠剂制备出Co3O4前驱体纤维,采用扫描电子显微镜对影响前驱体形貌的因素做了探究,并将煅烧产物Co3O4制备成扣式电池检测其电化学性能。结果表明:当采用无水乙醇+去离子水为溶剂,PVP为聚合物增稠剂,湿度为50%时,可达到良好的纺丝效果,并能制备出光滑、均匀、直径仅为315nm的纤维。将煅烧后的纤维用作锂离子电池负极时,首次放电比容量为843mAh/g,100次循环后其放电比容量为252mAh/g,并且在不同的电流密度下具有良好的倍率性能。
Co3O4 precursor fiber was prepared by electrospinning method with low molecular weight PVP (K30) as polymer thickener.The scanning electron microscope was used to investigate the factors affecting the precursor morphology,used the scanning electron microscope to explore the factors affecting the precursor morphology.The thermogravimetric analyzer and X-ray diffractometer were used to study the calcination mechanism of the precursor,and the calcined Co3O4 was prepared into a button cell to test its electricity chemical properties.The results shown that when using absolute ethanol+deionized water as the solvent,PVP as the polymer thickener,and the humidity was 50%,a good spinning effect can be achieved,and a smooth,uniform fiber with a diameter of only 315nm was produced.When the calcined fiber was used as a negative electrode of a lithium-ion battery,its first discharge specific capacity was 843mAh/g.After 100 cycles,its specific discharge capacity was 252mAh/g.It shown good rate performance under different current densities.
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