Influence of annealing temperature on microstructure and lithium storage performance of self-templated CuxCo3-xO4 hollow microspheres

被引:11
作者
Lei, Wanwan [1 ]
Nie, Longying [1 ]
Liu, Sheng [1 ,2 ]
Zhuo, Ying [1 ]
Yuan, Ruo [1 ]
机构
[1] Southwest Univ, Sch Chem & Chem Engn, Chongqing 400715, Peoples R China
[2] China Acad Engn Phys, Inst Chem Mat, Sichuan Res Ctr New Mat, Chengdu 610200, Peoples R China
基金
中国国家自然科学基金;
关键词
LI-ION BATTERIES; ORDERED MESOPOROUS CUCO2O4; ANODE MATERIALS; OXYGEN EVOLUTION; ELECTROCHEMICAL MECHANISM; CONTROLLABLE SYNTHESIS; FREE FABRICATION; FACILE SYNTHESIS; SPHERES; OXIDE;
D O I
10.1039/c6ra10215h
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Spinel CuxCo3-xO4 (x <= 0.30) hollow microspheres have been readily prepared via a self-templated solvothermal reaction followed by a thermal annealing step. Scanning electron microscopy and transmission electron microscopy images show that the as-prepared hollow microspheres possess an average diameter of similar to 450 nm and a compact, thin, polycrystalline shell with an average thickness of similar to 50 nm. When used as an anode material for lithium ion batteries, CuxCo3-xO4 hollow microspheres exhibit a high lithium storage capacity, which is strongly dependent on the annealing temperature of the CuxCo3-xO4 intermediate. As a result, CuxCo3-xO4 hollow microspheres annealed at 400 degrees C deliver a reversible discharge specific capacity as high as 1187 mA h g(-1) at a current density of 100 mA g(-1) after 50 cycles. Such superior lithium storage performance is derived from the particular microstructure of the shell, which is composed of highly close-connected fine nanoparticles, as well as the resultant better electronic conductivity.
引用
收藏
页码:62640 / 62646
页数:7
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