化工新型材料

化工新型材料 ›› 2021, Vol. 49 ›› Issue (10) : 128-132. DOI: 10.19817/j.cnki.issn 1006-3536.2021.10.027

新材料与新技术

Co₃O₄纳米纤维的制备及电化学性能研究

作者信息 +

Preparation of Co₃O₄ nanofiber and its electrochemical performance

Li Zhiwu, Deng Gengfeng, Zhou Xiaoming

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文章历史 +

Received		Published
2020-06-17		2021-10-20
Issue Date	Revised Date
2021-11-02	2020-06-17

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摘要

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。

Abstract

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.

关键词

四氧化三钴 / 锂离子电池 / 静电纺丝 / 纳米纤维

Key words

Co₃O₄ / lithium-ion battery / electrostatic spinning / nanofiber

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Co₃O₄纳米纤维的制备及电化学性能研究[J]. 化工新型材料, 2021, 49(10): 128-132 DOI:10.19817/j.cnki.issn 1006-3536.2021.10.027

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基金资助

国家自然科学基金(51564022)

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