Core-shell Ni0.5TiOPO4/C composites as anode materials in Li ion batteries

X. J. Zhang; Y. Zhang; Z. Zhou; J. P. Wei; R. Essehli; B. El Bali

doi:10.1016/j.electacta.2010.12.033

Core-shell Ni_0.5TiOPO₄/C composites as anode materials in Li ion batteries

X. J. Zhang
, Y. Zhang
, Z. Zhou
, J. P. Wei
, R. Essehli
, B. El Bali

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

Pristine Ni_0.5TiOPO₄ was prepared via a traditional solid-state reaction, and then Ni_0.5TiOPO₄/C composites with core-shell nanostructures were synthesized by hydrothermally treating Ni_0.5TiOPO₄ in glucose solution. X-ray diffraction patterns indicate that Ni_0.5TiOPO₄/C crystallizes in monoclinic P2₁/c space group. Scanning electron microscopy and transmission electron microscopy show that the small particles with different sizes are coated with uniform carbon film of ∼3 nm in thickness. Raman spectroscopy also confirms the presence of carbon in the composites. Ni _0.5TiOPO₄/C composites presented a capacity of 276 mAh g^-1 after 30 cycles at the current density of 42.7 mA g^-1, much higher than that of pristine Ni_0.5TiOPO₄ (155 mAh g^-1). The improved electrochemical performances can be attributed to the existence of carbon shell.

Original language	English
Pages (from-to)	2290-2294
Number of pages	5
Journal	Electrochimica Acta
Volume	56
Issue number	5
DOIs	https://doi.org/10.1016/j.electacta.2010.12.033
State	Published - Feb 1 2011
Externally published	Yes

Funding

This work was supported by Delta Environmental & Education Foundation (DEEF).

Keywords

Anode materials
Core-shell
Lithium-ion batteries
NiTiOPO/C

Access to Document

10.1016/j.electacta.2010.12.033

Cite this

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title = "Core-shell Ni0.5TiOPO4/C composites as anode materials in Li ion batteries",

abstract = "Pristine Ni0.5TiOPO4 was prepared via a traditional solid-state reaction, and then Ni0.5TiOPO4/C composites with core-shell nanostructures were synthesized by hydrothermally treating Ni0.5TiOPO4 in glucose solution. X-ray diffraction patterns indicate that Ni0.5TiOPO4/C crystallizes in monoclinic P21/c space group. Scanning electron microscopy and transmission electron microscopy show that the small particles with different sizes are coated with uniform carbon film of ∼3 nm in thickness. Raman spectroscopy also confirms the presence of carbon in the composites. Ni 0.5TiOPO4/C composites presented a capacity of 276 mAh g-1 after 30 cycles at the current density of 42.7 mA g-1, much higher than that of pristine Ni0.5TiOPO4 (155 mAh g-1). The improved electrochemical performances can be attributed to the existence of carbon shell.",

keywords = "Anode materials, Core-shell, Lithium-ion batteries, NiTiOPO/C",

author = "Zhang, \{X. J.\} and Y. Zhang and Z. Zhou and Wei, \{J. P.\} and R. Essehli and Bali, \{B. El\}",

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T1 - Core-shell Ni0.5TiOPO4/C composites as anode materials in Li ion batteries

AU - Zhang, X. J.

AU - Zhang, Y.

AU - Zhou, Z.

AU - Wei, J. P.

AU - Essehli, R.

AU - Bali, B. El

PY - 2011/2/1

Y1 - 2011/2/1

N2 - Pristine Ni0.5TiOPO4 was prepared via a traditional solid-state reaction, and then Ni0.5TiOPO4/C composites with core-shell nanostructures were synthesized by hydrothermally treating Ni0.5TiOPO4 in glucose solution. X-ray diffraction patterns indicate that Ni0.5TiOPO4/C crystallizes in monoclinic P21/c space group. Scanning electron microscopy and transmission electron microscopy show that the small particles with different sizes are coated with uniform carbon film of ∼3 nm in thickness. Raman spectroscopy also confirms the presence of carbon in the composites. Ni 0.5TiOPO4/C composites presented a capacity of 276 mAh g-1 after 30 cycles at the current density of 42.7 mA g-1, much higher than that of pristine Ni0.5TiOPO4 (155 mAh g-1). The improved electrochemical performances can be attributed to the existence of carbon shell.

AB - Pristine Ni0.5TiOPO4 was prepared via a traditional solid-state reaction, and then Ni0.5TiOPO4/C composites with core-shell nanostructures were synthesized by hydrothermally treating Ni0.5TiOPO4 in glucose solution. X-ray diffraction patterns indicate that Ni0.5TiOPO4/C crystallizes in monoclinic P21/c space group. Scanning electron microscopy and transmission electron microscopy show that the small particles with different sizes are coated with uniform carbon film of ∼3 nm in thickness. Raman spectroscopy also confirms the presence of carbon in the composites. Ni 0.5TiOPO4/C composites presented a capacity of 276 mAh g-1 after 30 cycles at the current density of 42.7 mA g-1, much higher than that of pristine Ni0.5TiOPO4 (155 mAh g-1). The improved electrochemical performances can be attributed to the existence of carbon shell.

KW - Anode materials

KW - Core-shell

KW - Lithium-ion batteries

KW - NiTiOPO/C

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DO - 10.1016/j.electacta.2010.12.033

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JO - Electrochimica Acta

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