TY - JOUR
T1 - Graphitized porous carbon microspheres assembled with carbon black nanoparticles as improved anode materials in Li-ion batteries
AU - Zhang, Lei
AU - Zhang, Meiju
AU - Wang, Yanhong
AU - Zhang, Zailei
AU - Kan, Guangwei
AU - Wang, Cunguo
AU - Zhong, Ziyi
AU - Su, Fabing
PY - 2014/7/14
Y1 - 2014/7/14
N2 - We report the facile preparation of graphitized porous carbon microspheres (GPCMs) by the spray drying technique using carbon black (CB) nanoparticles as the primary carbon resource and sucrose as the binder, followed by graphitization at 2800 °C. The samples were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, nitrogen adsorption, thermogravimetric analysis, and Raman spectroscopy. It is found that the GPCMs with a size of 5-20 μm delivered a reversible capacity of 459 mA h g-1 at the current density of 50 mA g-1 after 100 cycles, much higher than that of the commercial graphite microspheres (GMs) (372 mA h g-1). More importantly, GPCMs exhibited excellent rate performances with a capacity of 338 and 300 mA h g-1 at the current densities of 500 and 1000 mA g-1 respectively, superior to those of GMs (200 and 100 mA h g-1). The excellent electrochemical properties of GPCMs originate from its unique structure, which is composed of core-shell nanoparticles with the graphitized carbon core derived from CB nanoparticles and the hard carbon shell generated from sucrose, providing more lithium ion storage sites, higher electronic conductivity, and fast ion diffusion. This work opens a simple way to large-scale production of new carbon anode materials with a low cost and good performance for Li-ion batteries. 2014 This journal is
AB - We report the facile preparation of graphitized porous carbon microspheres (GPCMs) by the spray drying technique using carbon black (CB) nanoparticles as the primary carbon resource and sucrose as the binder, followed by graphitization at 2800 °C. The samples were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, nitrogen adsorption, thermogravimetric analysis, and Raman spectroscopy. It is found that the GPCMs with a size of 5-20 μm delivered a reversible capacity of 459 mA h g-1 at the current density of 50 mA g-1 after 100 cycles, much higher than that of the commercial graphite microspheres (GMs) (372 mA h g-1). More importantly, GPCMs exhibited excellent rate performances with a capacity of 338 and 300 mA h g-1 at the current densities of 500 and 1000 mA g-1 respectively, superior to those of GMs (200 and 100 mA h g-1). The excellent electrochemical properties of GPCMs originate from its unique structure, which is composed of core-shell nanoparticles with the graphitized carbon core derived from CB nanoparticles and the hard carbon shell generated from sucrose, providing more lithium ion storage sites, higher electronic conductivity, and fast ion diffusion. This work opens a simple way to large-scale production of new carbon anode materials with a low cost and good performance for Li-ion batteries. 2014 This journal is
UR - http://www.scopus.com/inward/record.url?scp=84902248753&partnerID=8YFLogxK
U2 - 10.1039/c4ta00356j
DO - 10.1039/c4ta00356j
M3 - 文章
AN - SCOPUS:84902248753
SN - 2050-7488
VL - 2
SP - 10161
EP - 10168
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 26
ER -