摘要
Herein, we report a "dissolution-reassembly" approach for preparation of N-doped hollow carbon spheres with mesoporous/microporous composite structure (H(Micro/Meso)CS). Basing on the compositional inhomogeneity inside the nanospheres of 3-aminophenol/formaldehyde (3-AF) polymerization, the internal 3-AF oligomer with low-molecular-weight is dissolved by acetone to form cavity. Then the dispersive 3-AF oligomer reassemble with silica oligomer as pore-forming agent and cetyltrimethyl-ammonium bromide as surfactant to form a mesoporous outer shell. In addition, the amount of acetone has a great influence on the morphology and structure of H(Micro/Meso)CS. The obtained H(Micro/Meso)CS shows uniform spherical and microporous/mesoporous shell structure and has a high specific capacity and excellent high rate capability.
Herein,we report a"dissolution-reassembly"approach for preparation of N-doped hollow carbon spheres with mesoporous/microporous composite structure(H(Micro/Meso)CS).Basing on the compositional inhomogeneity inside the nanosphe res of 3-ami nop henol/fo rmalde hyde(3-AF)polymerization,the internal 3-AF oligomer with low-molecular-weight is dissolved by acetone to form cavity.Then the dispersive 3-AF oligomer reassemble with silica oligomer as pore-forming agent and cetyltrimethyl-ammonium bromide as surfactant to form a mesoporous outer shell.In addition,the amount of acetone has a great influence on the morphology and structure of H(Micro/Meso)CS.The obtained H(Micro/Meso)CS shows uniform spherical and microporous/mesoporous shell structure and has a high specific capacity and excellent high rate capability.
基金
the National Natural Science Foundation of China(No. 21676070)
Hebei One Hundred-Excellent Innovative Talent Program(Ⅲ)(No. SLRC2017034)
Beijing National Laboratory for Molecular Sciences
