Mesoporous Mn_0.5Co_0.5Fe₂O₄ nanospheres grown on graphene for enhanced lithium storage properties

TY - JOUR

T1 - Mesoporous Mn0.5Co0.5Fe2O4 nanospheres grown on graphene for enhanced lithium storage properties

AU - Zhang, Zailei

AU - Wang, Yanhong

AU - Li, Dan

AU - Tan, Qiangqiang

AU - Chen, Yunfa

AU - Zhong, Ziyi

AU - Su, Fabing

PY - 2013/10/23

Y1 - 2013/10/23

N2 - We report in situ growth of mesoporous Mn0.5Co0.5Fe2O4 (MCFO) nanospheres on graphene to form MCFO/graphene nanocomposites by a facile solvothermal method. In the synthesis, Mn(CH3COO)2, Co(CH3COO)2, and FeCl3 were used as the metal precursors and CH3COOK, CH3COOC2H5, and HOCH2CH2OH as the mixed solvent. The obtained MCFO nanospheres (50-200 nm) were composed of small nanoparticles (5-15 nm), and the graphene surface acted as the nucleation sites in growing MCFO nanospheres. Compared with the bare MCFO nanospheres and the MCFO nanospheres physically mixed with graphene, the MCFO/graphene nanocomposite with 2.1 wt % graphene as anode material in Li ion batteries showed a significantly enhanced electrochemical performance with high lithium storage capacity and excellent cycling stability. This is because the introduced graphene can prevent the aggregation of nanospheres and provides a pathway for excellent Li+ ion diffusion and electronic conduction. This work opens a way for facile fabrication of metal oxide/graphene nanocomposites.

AB - We report in situ growth of mesoporous Mn0.5Co0.5Fe2O4 (MCFO) nanospheres on graphene to form MCFO/graphene nanocomposites by a facile solvothermal method. In the synthesis, Mn(CH3COO)2, Co(CH3COO)2, and FeCl3 were used as the metal precursors and CH3COOK, CH3COOC2H5, and HOCH2CH2OH as the mixed solvent. The obtained MCFO nanospheres (50-200 nm) were composed of small nanoparticles (5-15 nm), and the graphene surface acted as the nucleation sites in growing MCFO nanospheres. Compared with the bare MCFO nanospheres and the MCFO nanospheres physically mixed with graphene, the MCFO/graphene nanocomposite with 2.1 wt % graphene as anode material in Li ion batteries showed a significantly enhanced electrochemical performance with high lithium storage capacity and excellent cycling stability. This is because the introduced graphene can prevent the aggregation of nanospheres and provides a pathway for excellent Li+ ion diffusion and electronic conduction. This work opens a way for facile fabrication of metal oxide/graphene nanocomposites.

UR - http://www.scopus.com/inward/record.url?scp=84886771596&partnerID=8YFLogxK

U2 - 10.1021/ie4026727

DO - 10.1021/ie4026727

M3 - 文章

AN - SCOPUS:84886771596

SN - 0888-5885

VL - 52

SP - 14906

EP - 14912

JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

IS - 42

ER -