期刊
CERAMICS INTERNATIONAL
卷 42, 期 4, 页码 5160-5170出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2015.12.038
关键词
MOF; Co3O4; Anode materials; Scanning electron microscopy; Lithium-ion batteries
资金
- National Natural Science Foundation of China [51072072, 51272095]
- Natural Science Foundation of Jiangsu Province [BK20141293]
- Natural Science Foundation of the Higher Education Institutions of Jiangsu Province [13KJB430012]
- Opening Project of State Key Laboratory of Fire Science [HZ2015-KF03]
- Qing Lan Project of Jiangsu Province [1614101401]
Porous metal oxides hierarchical structures with controlled morphologies have received great attention because of their promising applications in catalysis, energy storage, gas sensing, etc. Porous Co3O4 hierarchical structures with controlled morphologies were synthesized on the basis of a pyrolytic conversion of Co-based metal-organic frameworks (Co-MOFs), which were initially grown in solutions containing Co(NO3)(2)center dot 6H(2)O, 1,3,5-Benzentricarboxylic acid and pyrazine as solute and N,N-dimethylformamide (DMF) as solvent under a solvothermal condition. Porous Co3O4 with twin hemispherical and flower-like structures were obtained with the assistance of PVP by adjusting the amount of pyrazine. The results of nitrogen adsorption desorption indicate the BET surface area (22.6 m(2) g(-1)) of twin hemispherical Co3O4 structures is lower than that (33.3 m(2) g(-1)) of flower-like Co3O4 structures. However, the pore size of twin hemispherical Co3O4 structures is smaller, which is centered at about 2.5, 4.0 and 20.0 nm. The Co3O4 with twin hemispherical structures exhibit more excellent electrochemical performance as anode materials for lithium ion batteries than that of flower-like Co3O4 structures, which may be attributed to the smaller particle size and compact porous structures with suitable pore size. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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