具有分级结构的Co3O4绣球花状微米球的构筑及其锂离子电池负极性能研究

doi:10.3976/j.issn.1002-4026.2017.06.008

山东科学 ›› 2017, Vol. 30 ›› Issue (6): 45-49.doi: 10.3976/j.issn.1002-4026.2017.06.008

具有分级结构的Co3O4绣球花状微米球的构筑及其锂离子电池负极性能研究

魏磊¹，王伟²

1. 山东省科学院新材料研究所，山东济南 250014；2. 济南大学材料科学与工程学院，山东济南 250022

收稿日期:2017-08-05 出版日期:2017-12-20 发布日期:2017-12-20
作者简介:魏磊（1985—），男，助理研究员，博士研究生，研究方向为光电功能材料的设计与合成。E-mail：weilei@sdas.org
基金资助:
国家自然科学基金（51672164）；山东省自然科学基金（ZR2014EMQ004, ZR2016EMM12)

Facile fabrication of Co3O4 hydrangealike microspheres with hierarchical structure and research on their enhanced performance in lithium ion batteries

WEI Lei ¹, WANG Wei²

1. Advanced Materials Research Institute, Shandong Academy of Sciences，Jinan 250014， China；
2. School of Materials Science and Engineering , University of Jinan, Jinan 250022, China

Received:2017-08-05 Online:2017-12-20 Published:2017-12-20

摘要/Abstract

摘要：

采用溶剂热法合成了绣球花状Co3O4纳米材料，并利用扫描电子显微镜和X射线衍射仪进行了微观形貌和结构的表征，结果显示样品的形貌为4~6 μm 绣球花状分级结构微米球，结晶良好，无杂相生成。该绣球花状Co3O4纳米材料用做锂离子电池负极材料时表现出很高的可逆比容量和良好的循环性能。在300 mA/g电流密度下，首次放电比容量达1 508 mA·h/g，经过20次循环可逆比容量为1 300 mA·h/g。其良好的电化学性能归功于绣球花状Co3O4材料的独特形貌，其多级结构能够缩短锂离子的传输路径，并且拥有足够大的孔隙，来适应和缓解电极材料在循环过程的体积效应。

关键词: 锂离子电池, 绣球花状, 溶剂热法, Co3O4

Abstract:

In this paper, the hydrangealike Co3O4 nanomaterials have been developed using solvothermal method, and the morphology and microstructure analysis have been identified by the SEM and XRD. The results showed that the morphology of sample was 4~6 μm hydrangea like microspheres with hierarchical structure, wellcrystallized and without any impurity phase. When applied as anode material in lithium ion battery, hydrangealike Co3O4 hierarchical structure demonstrated high reversible capacity and good recyclability. The Co3O4 anode could deliver initial discharge capacity as high as 1508 mA·h/g at a current density of 300 mA/g, and had excellent reversible capacity of 1300 mA·h/g after 20 cycles. The unique morphology of the assynthesized hydrangealike Co3O4 nanomaterials enhances their electrochemical performance. The peculiar hierarchical structure of Co3O4 provides a short path for Li+ ion diffusion, and enough free space to accommodate the large volume changed during cycling.

Key words: Co3O4, hydrangea-like, lithium-ion batteries, solvothermal

中图分类号:

TB34

魏磊，王伟 . 具有分级结构的Co3O4绣球花状微米球的构筑及其锂离子电池负极性能研究[J]. 山东科学, 2017, 30(6): 45-49.

WEI Lei,WANG Wei. Facile fabrication of Co3O4 hydrangealike microspheres with hierarchical structure and research on their enhanced performance in lithium ion batteries[J]. SHANDONG SCIENCE, 2017, 30(6): 45-49.

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具有分级结构的Co3O4绣球花状微米球的构筑及其锂离子电池负极性能研究

Facile fabrication of Co3O4 hydrangealike microspheres with hierarchical structure and research on their enhanced performance in lithium ion batteries

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