Facile Fabrication of Bicomponent CoO/CoFe2O4‐N‐Doped Graphene Hybrids with Ultrahigh Lithium Storage Capacity |
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| Authors: | Changtai Zhao Chang Yu Shaohong Liu Juan Yang Xiaoming Fan Jieshan Qiu |
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| Institution: | Carbon Research Laboratory, Liaoning Key Lab for Energy Materials and Chemical Engineering, State Key Lab of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, P. R. China |
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| Abstract: | A facile strategy is developed to fabricate bicomponent CoO/CoFe2O4‐N‐doped graphene hybrids (CoO/CoFe2O4‐NG). These hybrids are demonstrated to be potential high‐performance anodes for lithium‐ion batteries (LIBs). The CoO/CoFe2O4 nanoplatelets are finely dispersed on the surface of N‐doped graphene nanosheets (CoO/CoFe2O4‐NG). The CoO/CoFe2O4‐NG electrode exhibits ultrahigh specific capacity with 1172 mA h g?1 at 500 mA g?1 and 970 mA h g?1 at 1000 mA g?1 as well as excellent cycle stability due to the synergetic effects of N‐doped graphene and CoO/CoFe2O4 nanoplatelets. The well‐dispersed bicomponent CoO/CoFe2O4 is responsible for the high specific capacity. The N‐doped graphene with high specific surface area has dual roles: to provide active sites for dispersing the CoO/CoFe2O4 species and to function as an electrical conducting matrix for fast charge transfer. This method provides a simple and efficient way to configure the hybridized electrode materials with high lithium storage capacity. |
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| Keywords: | CoO/CoFe2O4 graphene lithium‐ion batteries electrodes hybrid materials nanoplatelets |
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