期刊
CHEMICAL ENGINEERING JOURNAL
卷 355, 期 -, 页码 805-814出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.08.141
关键词
Few-layered graphene; Fe3O4; SiOx microsphere; Lithium-ion batteries
资金
- National Key Research and Development Program of China [2018YFF0215502]
- Department of Science and Technology of Guangdong [2014B010123001, 2015B090901030, 2016B050502004]
- Bureau of Science and Technology of Foshan Municipality [2016AG100522]
A facile, scalable route is adopted to synthesize egg-like few-layered graphene-wrapped and Fe3O4-pillared SiOx anodes (SiOx@Fe3O4@FLG) for lithium-ion batteries. The rationally designed egg-like SiOx-cored composites possess a strong capability in accommodating volume change of micro-sized SiOx particles during Li cycling. Comprehensive effect of integrated structure, pseudocapacitance contribution and enhanced kinetics enables SiOx@Fe3O4@FLG electrode to afford a high-rate, long-term performance, e.g., 833.4 mA h g(-1) (1550 mA h cm(-3)) at 0.5 A g(-1) after 500 cycles with 81.8% capacity retention ratio. Such an attribute makes SiOx@ Fe3O4@FLG composites promising anode materials for high-energy Li-ion battery.
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