Synergies of the crystallinity and conductive agents on the electrochemical properties of the hollow Fe 3O 4 spheres

Yuanfu Deng; Qiumei Zhang; Zhicong Shi; Lijun Han; Feng Peng; Guohua Chen

doi:10.1016/j.electacta.2012.05.071

Synergies of the crystallinity and conductive agents on the electrochemical properties of the hollow Fe ₃O ₄ spheres

Yuanfu Deng, Qiumei Zhang, Zhicong Shi, Lijun Han, Feng Peng, Guohua Chen

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

35 Citations (Scopus)

Abstract

Monodispersed hollow Fe ₃O ₄ spheres with different diameters and shell thickness were synthesized by a simple solvothermal process and were investigated as anode materials for lithium ion batteries (LIBs). The shell of the hollow spheres exhibited porous structure composed of aggregated Fe ₃O ₄ nanoparticles. The composition and morphology of the obtained samples were characterized by X-ray powder diffraction (XRD), Raman spectra, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). A novel formation mechanism was proposed based on the results of time-dependent reactions. The electrochemical tests of the hollow Fe ₃O ₄ spheres were performed to determine the reversible capacity, rate and cycling performance as anode materials for LIBs. The Fe ₃O ₄ obtained from the reaction at 200°C for 48 h exhibited the best specific capacity and capacity retention and superior rate performance compared to other Fe ₃O ₄ spheres, which is ascribed to their reasonable particle size, high crystallinity and hollow spherical structures. Different conductive additive were used to investigate the electrochemical performance of Fe ₃O ₄ hollow spheres. The binary conductive additives containing acetylene black (AB) and carbon nanobutes (CNTs) improved the electrochemical performance of the Fe ₃O ₄ hollow spheres obviously. The results reveal that there is a synergistic effect of the particle size, crystallinity and conductive agents on the electrochemical properties of the hollow Fe ₃O ₄ spheres. © 2012 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	495-503
Journal	Electrochimica Acta
Volume	76
DOIs	https://doi.org/10.1016/j.electacta.2012.05.071
Publication status	Published - 1 Aug 2012
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

Anode materials
High capacity
Hollow sphere
Lithium ion batteries
Magnetite

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title = "Synergies of the crystallinity and conductive agents on the electrochemical properties of the hollow Fe 3O 4 spheres",

abstract = "Monodispersed hollow Fe 3O 4 spheres with different diameters and shell thickness were synthesized by a simple solvothermal process and were investigated as anode materials for lithium ion batteries (LIBs). The shell of the hollow spheres exhibited porous structure composed of aggregated Fe 3O 4 nanoparticles. The composition and morphology of the obtained samples were characterized by X-ray powder diffraction (XRD), Raman spectra, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). A novel formation mechanism was proposed based on the results of time-dependent reactions. The electrochemical tests of the hollow Fe 3O 4 spheres were performed to determine the reversible capacity, rate and cycling performance as anode materials for LIBs. The Fe 3O 4 obtained from the reaction at 200°C for 48 h exhibited the best specific capacity and capacity retention and superior rate performance compared to other Fe 3O 4 spheres, which is ascribed to their reasonable particle size, high crystallinity and hollow spherical structures. Different conductive additive were used to investigate the electrochemical performance of Fe 3O 4 hollow spheres. The binary conductive additives containing acetylene black (AB) and carbon nanobutes (CNTs) improved the electrochemical performance of the Fe 3O 4 hollow spheres obviously. The results reveal that there is a synergistic effect of the particle size, crystallinity and conductive agents on the electrochemical properties of the hollow Fe 3O 4 spheres. {\textcopyright} 2012 Elsevier Ltd. All rights reserved.",

keywords = "Anode materials, High capacity, Hollow sphere, Lithium ion batteries, Magnetite",

author = "Yuanfu Deng and Qiumei Zhang and Zhicong Shi and Lijun Han and Feng Peng and Guohua Chen",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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T1 - Synergies of the crystallinity and conductive agents on the electrochemical properties of the hollow Fe 3O 4 spheres

AU - Deng, Yuanfu

AU - Zhang, Qiumei

AU - Shi, Zhicong

AU - Han, Lijun

AU - Peng, Feng

AU - Chen, Guohua

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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N2 - Monodispersed hollow Fe 3O 4 spheres with different diameters and shell thickness were synthesized by a simple solvothermal process and were investigated as anode materials for lithium ion batteries (LIBs). The shell of the hollow spheres exhibited porous structure composed of aggregated Fe 3O 4 nanoparticles. The composition and morphology of the obtained samples were characterized by X-ray powder diffraction (XRD), Raman spectra, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). A novel formation mechanism was proposed based on the results of time-dependent reactions. The electrochemical tests of the hollow Fe 3O 4 spheres were performed to determine the reversible capacity, rate and cycling performance as anode materials for LIBs. The Fe 3O 4 obtained from the reaction at 200°C for 48 h exhibited the best specific capacity and capacity retention and superior rate performance compared to other Fe 3O 4 spheres, which is ascribed to their reasonable particle size, high crystallinity and hollow spherical structures. Different conductive additive were used to investigate the electrochemical performance of Fe 3O 4 hollow spheres. The binary conductive additives containing acetylene black (AB) and carbon nanobutes (CNTs) improved the electrochemical performance of the Fe 3O 4 hollow spheres obviously. The results reveal that there is a synergistic effect of the particle size, crystallinity and conductive agents on the electrochemical properties of the hollow Fe 3O 4 spheres. © 2012 Elsevier Ltd. All rights reserved.

AB - Monodispersed hollow Fe 3O 4 spheres with different diameters and shell thickness were synthesized by a simple solvothermal process and were investigated as anode materials for lithium ion batteries (LIBs). The shell of the hollow spheres exhibited porous structure composed of aggregated Fe 3O 4 nanoparticles. The composition and morphology of the obtained samples were characterized by X-ray powder diffraction (XRD), Raman spectra, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). A novel formation mechanism was proposed based on the results of time-dependent reactions. The electrochemical tests of the hollow Fe 3O 4 spheres were performed to determine the reversible capacity, rate and cycling performance as anode materials for LIBs. The Fe 3O 4 obtained from the reaction at 200°C for 48 h exhibited the best specific capacity and capacity retention and superior rate performance compared to other Fe 3O 4 spheres, which is ascribed to their reasonable particle size, high crystallinity and hollow spherical structures. Different conductive additive were used to investigate the electrochemical performance of Fe 3O 4 hollow spheres. The binary conductive additives containing acetylene black (AB) and carbon nanobutes (CNTs) improved the electrochemical performance of the Fe 3O 4 hollow spheres obviously. The results reveal that there is a synergistic effect of the particle size, crystallinity and conductive agents on the electrochemical properties of the hollow Fe 3O 4 spheres. © 2012 Elsevier Ltd. All rights reserved.

KW - Anode materials

KW - High capacity

KW - Hollow sphere

KW - Lithium ion batteries

KW - Magnetite

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JO - Electrochimica Acta

JF - Electrochimica Acta

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