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A monodispersed nano-hexahedral LiFePO4 with improved power capability by carbon-coatings

A monodispersed nano-sized hexahedral LiFePO of regular angularity was prepared through hydrothermal process. Different carbon precursors were employed to create carbon-coating layers onto the nano-particles to improve the electrochemical performances of the material. Structure and morphology of the... Full description

Journal Title: Journal of Alloys and Compounds 05 December 2013, Vol.579, pp.377-383
Main Author: Li, Jing
Other Authors: Qu, Qunting , Zhang, Longfei , Zhang, Li , Zheng, Honghe
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0925-8388 ; E-ISSN: 1873-4669 ; DOI: 10.1016/j.jallcom.2013.06.097
Link: https://www.sciencedirect.com/science/article/pii/S0925838813014953
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recordid: elsevier_sdoi_10_1016_j_jallcom_2013_06_097
title: A monodispersed nano-hexahedral LiFePO4 with improved power capability by carbon-coatings
format: Article
creator:
  • Li, Jing
  • Qu, Qunting
  • Zhang, Longfei
  • Zhang, Li
  • Zheng, Honghe
subjects:
  • Lithium-Ion Batteries
  • Lifepo4
  • Carbon-Coating
  • Hydrothermal Synthesis
  • Engineering
  • Chemistry
  • Physics
ispartof: Journal of Alloys and Compounds, 05 December 2013, Vol.579, pp.377-383
description: A monodispersed nano-sized hexahedral LiFePO of regular angularity was prepared through hydrothermal process. Different carbon precursors were employed to create carbon-coating layers onto the nano-particles to improve the electrochemical performances of the material. Structure and morphology of the LiFePO material without and with carbon-coating layer were studied using a combination of X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy. It confirms that carbon-coating plays an important role inhibiting the agglomeration of the nanoparticles. A uniform carbon-coating layer of higher graphitization degree was developed on the LiFePO particles with sucrose precursor. The electrode exhibits discharge capacities of 148.3 mA h g , 138.7 mA h g , 117.8 mA h g at 0.1 C, 1 C and 10 C, respectively. Very close Li ion diffusion coefficient of around 8 × 10 cm s for all the LiFePO /C composites with different carbon sources implies that the improved power capability is mainly attributed to the small particle size and low contact resistance between the LiFePO nanoparticles.
language: eng
source:
identifier: ISSN: 0925-8388 ; E-ISSN: 1873-4669 ; DOI: 10.1016/j.jallcom.2013.06.097
fulltext: fulltext
issn:
  • 0925-8388
  • 09258388
  • 1873-4669
  • 18734669
url: Link


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titleA monodispersed nano-hexahedral LiFePO4 with improved power capability by carbon-coatings
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subjectLithium-Ion Batteries ; Lifepo4 ; Carbon-Coating ; Hydrothermal Synthesis ; Engineering ; Chemistry ; Physics
descriptionA monodispersed nano-sized hexahedral LiFePO of regular angularity was prepared through hydrothermal process. Different carbon precursors were employed to create carbon-coating layers onto the nano-particles to improve the electrochemical performances of the material. Structure and morphology of the LiFePO material without and with carbon-coating layer were studied using a combination of X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy. It confirms that carbon-coating plays an important role inhibiting the agglomeration of the nanoparticles. A uniform carbon-coating layer of higher graphitization degree was developed on the LiFePO particles with sucrose precursor. The electrode exhibits discharge capacities of 148.3 mA h g , 138.7 mA h g , 117.8 mA h g at 0.1 C, 1 C and 10 C, respectively. Very close Li ion diffusion coefficient of around 8 × 10 cm s for all the LiFePO /C composites with different carbon sources implies that the improved power capability is mainly attributed to the small particle size and low contact resistance between the LiFePO nanoparticles.
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