期刊
RSC ADVANCES
卷 7, 期 5, 页码 2637-2643出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra26937k
关键词
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资金
- National Natural Science Foundation of China [21276257, 91534109, 21503006]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09010103]
- National Key Projects for Fundamental Research and Development of China [2016YFB0100100]
- Research Foundation for Youth Scholars of Beijing Technology and Business University [QNJJ2014-14]
In this work, urchin-like microspheres consisting of radial carbon-coated cobalt monoxide nanowires are designed, to fabricate a micro/nano hierarchical structure for efficient Li-storage. A sequential conversion process is adopted, involving hydrothermal synthesis of an urchin-like cobalt carbonate hydroxide precursor, glycosidation of glucose as a coating layer, and calcination in an inert atmosphere to form a CoO-C composite. On the one hand, the CoO framework provides a high Li-storage capacity with short transport paths and ordered free spaces. On the other hand, the carbon coating layer buffers the volume expansion of inner active materials during lithiation, while providing a stabilized electrode/electrolyte interface and rapid electronic conduction. When tested as an anode material for lithium ion batteries, the urchin-like CoO-C delivers a reversible capacity of 755 mA h g(-1) after 100 cycles. With rate increasing, the performance advantage of the CoO-C composite electrode over a single CoO electrode is obvious.
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