In situ formation of hollow graphitic carbon nanospheres in electrospun amorphous carbon nanofibers for high-performance Li-based batteries

Chen, Yuming1; Lu, Zhouguang1,5; Zhou, Limin1; Mai, Yiu-Wing1,2; Huang, Haitao3,4

2012-11-07

10.1039/c2nr31557b

Nanoscale   影响因子和分区

2040-3364

2040-3372

We report on in situ formation of hollow graphitic carbon nanospheres (HGCNs) in amorphous carbon nanofibers (ACNFs) by a combination of electrospinning, calcination and acid treatment. The prepared carbon nanofibers contain many HGCNs on which defects such as discontinuous graphene sheets with a large d-spacing in their wall exist and provide extra sites for Li+ storage and serve as buffers for withstanding large volume expansion and shrinkage during the Li insertion and extraction procedure. Furthermore, some exposed HGCNs on the surface of the ACNFs as well as hollow structures are favorable for lithium ion diffusion from different orientations and sufficient contact between active material and electrolyte. In addition, the high conductivity architectures facilitate collection and transport of electrons during the cycling process. As a result, the ACNFs/HGCNs display a high reversible specific gravimetric capacity of similar to 750 mA h g(-1) and volumetric capacity of similar to 1.1 A h cm(-3) with outstanding rate capability and good cycling stability, which is superior to those of carbon nanofibers (CNFs), carbon nanotubes (CNTs), porous ACNFs, graphene nanosheets (GNSs), GNSs/CNFs, hollow carbon nanospheres and graphite. The synthesis process is simple, low-cost and environmentally friendly, providing new avenues for the rational engineering of high-energy carbon-based anode materials.

SCI ; EI

英语

其他

Hong Kong Polytechnic University[1-BD08] ; Hong Kong Polytechnic University[G-YX2G]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000310940500020

ROYAL SOC CHEMISTRY

20131016079016

Amorphous carbon ; Anodes ; Carbon nanofibers ; Carbon nanotubes ; Cost engineering ; Electrolytes ; Lithium-ion batteries ; Nanospheres

Electric Batteries and Fuel Cells:702 ; Electron Tubes:714.1 ; Nanotechnology:761 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Cost and Value Engineering; Industrial Economics:911 ; Solid State Physics:933 ; Amorphous Solids:933.2

Web of Science

1.Hong Kong Polytech Univ, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China
2.Univ Sydney, Sch Aerosp Mech & Mechatron Engn J07, Ctr Adv Mat Technol CAMT, Sydney, NSW 2006, Australia
3.Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong, Hong Kong, Peoples R China
4.Hong Kong Polytech Univ, Mat Res Ctr, Hong Kong, Hong Kong, Peoples R China
5.S Univ Sci & Technol China, Div Micro & Nano Mat & Devices, Shenzhen, Guangdong, Peoples R China

Chen, Yuming,Lu, Zhouguang,Zhou, Limin,et al. In situ formation of hollow graphitic carbon nanospheres in electrospun amorphous carbon nanofibers for high-performance Li-based batteries[J]. Nanoscale,2012,4(21):6800-6805.

Chen, Yuming,Lu, Zhouguang,Zhou, Limin,Mai, Yiu-Wing,&Huang, Haitao.(2012).In situ formation of hollow graphitic carbon nanospheres in electrospun amorphous carbon nanofibers for high-performance Li-based batteries.Nanoscale,4(21),6800-6805.

Chen, Yuming,et al."In situ formation of hollow graphitic carbon nanospheres in electrospun amorphous carbon nanofibers for high-performance Li-based batteries".Nanoscale 4.21(2012):6800-6805.