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Facile Fabrication of Bicomponent CoO/CoFe 2 O 4 ‐N‐Doped Graphene Hybrids with Ultrahigh Lithium Storage Capacity
Author(s) -
Zhao Changtai,
Yu Chang,
Liu Shaohong,
Yang Juan,
Fan Xiaoming,
Qiu Jieshan
Publication year - 2015
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201400114
Subject(s) - graphene , materials science , lithium (medication) , doping , chemical engineering , fabrication , anode , electrode , nanotechnology , optoelectronics , chemistry , medicine , alternative medicine , pathology , endocrinology , engineering
A facile strategy is developed to fabricate bicomponent CoO/CoFe 2 O 4 ‐N‐doped graphene hybrids (CoO/CoFe 2 O 4 ‐NG). These hybrids are demonstrated to be potential high‐performance anodes for lithium‐ion batteries (LIBs). The CoO/CoFe 2 O 4 nanoplatelets are finely dispersed on the surface of N‐doped graphene nanosheets (CoO/CoFe 2 O 4 ‐NG). The CoO/CoFe 2 O 4 ‐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/CoFe 2 O 4 nanoplatelets. The well‐dispersed bicomponent CoO/CoFe 2 O 4 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/CoFe 2 O 4 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.