Low temperature synthesis of graphene-wrapped LiFePO4nanorod cathodes by the polyol method

Sei Woon Oh; Zhen Dong Huang; Biao Zhang; Yang Yu; Yan Bing He; Jang Kyo Kim

doi:10.1039/c2jm33615d

Low temperature synthesis of graphene-wrapped LiFePO₄nanorod cathodes by the polyol method

Sei Woon Oh, Zhen Dong Huang, Biao Zhang, Yang Yu, Yan Bing He, Jang Kyo Kim

Research output: Journal article publication › Journal article › Academic research › peer-review

61 Citations (Scopus)

Abstract

A facile, low temperature polyol method is developed to synthesize graphene-wrapped, rod-shaped LiFePO4(LFP) cathode materials. The effects of reaction temperature and reduced graphene oxide (RGO) on the morphology and electrochemical performance of RGO/LFP composites are studied. The RGO/LFP containing 10 wt% precursor GO and synthesized at 220 °C presents the best electrochemical properties, namely discharge specific capacities of 164.1, 156.7 and 121.5 mA h g-1after 100 cycles with capacity retention ratios of 99.0, 97.9 and 98.6% at 0.1 C, 1 C and 10 C, respectively. These values are considered among the highest reported in the literature for LFP cathodes with similar carbon additives. The improved electronic conduction and reduced charge transfer resistance arising from the RGO sheets are responsible for the excellent electrochemical properties.

Original language	English
Pages (from-to)	17215-17221
Number of pages	7
Journal	Journal of Materials Chemistry
Volume	22
Issue number	33
DOIs	https://doi.org/10.1039/c2jm33615d
Publication status	Published - 7 Sept 2012
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
Materials Chemistry

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10.1039/c2jm33615d

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title = "Low temperature synthesis of graphene-wrapped LiFePO4nanorod cathodes by the polyol method",

abstract = "A facile, low temperature polyol method is developed to synthesize graphene-wrapped, rod-shaped LiFePO4(LFP) cathode materials. The effects of reaction temperature and reduced graphene oxide (RGO) on the morphology and electrochemical performance of RGO/LFP composites are studied. The RGO/LFP containing 10 wt% precursor GO and synthesized at 220 °C presents the best electrochemical properties, namely discharge specific capacities of 164.1, 156.7 and 121.5 mA h g-1after 100 cycles with capacity retention ratios of 99.0, 97.9 and 98.6% at 0.1 C, 1 C and 10 C, respectively. These values are considered among the highest reported in the literature for LFP cathodes with similar carbon additives. The improved electronic conduction and reduced charge transfer resistance arising from the RGO sheets are responsible for the excellent electrochemical properties.",

author = "Oh, {Sei Woon} and Huang, {Zhen Dong} and Biao Zhang and Yang Yu and He, {Yan Bing} and Kim, {Jang Kyo}",

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AU - Oh, Sei Woon

AU - Huang, Zhen Dong

AU - Zhang, Biao

AU - Yu, Yang

AU - He, Yan Bing

AU - Kim, Jang Kyo

PY - 2012/9/7

Y1 - 2012/9/7

N2 - A facile, low temperature polyol method is developed to synthesize graphene-wrapped, rod-shaped LiFePO4(LFP) cathode materials. The effects of reaction temperature and reduced graphene oxide (RGO) on the morphology and electrochemical performance of RGO/LFP composites are studied. The RGO/LFP containing 10 wt% precursor GO and synthesized at 220 °C presents the best electrochemical properties, namely discharge specific capacities of 164.1, 156.7 and 121.5 mA h g-1after 100 cycles with capacity retention ratios of 99.0, 97.9 and 98.6% at 0.1 C, 1 C and 10 C, respectively. These values are considered among the highest reported in the literature for LFP cathodes with similar carbon additives. The improved electronic conduction and reduced charge transfer resistance arising from the RGO sheets are responsible for the excellent electrochemical properties.

AB - A facile, low temperature polyol method is developed to synthesize graphene-wrapped, rod-shaped LiFePO4(LFP) cathode materials. The effects of reaction temperature and reduced graphene oxide (RGO) on the morphology and electrochemical performance of RGO/LFP composites are studied. The RGO/LFP containing 10 wt% precursor GO and synthesized at 220 °C presents the best electrochemical properties, namely discharge specific capacities of 164.1, 156.7 and 121.5 mA h g-1after 100 cycles with capacity retention ratios of 99.0, 97.9 and 98.6% at 0.1 C, 1 C and 10 C, respectively. These values are considered among the highest reported in the literature for LFP cathodes with similar carbon additives. The improved electronic conduction and reduced charge transfer resistance arising from the RGO sheets are responsible for the excellent electrochemical properties.

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Low temperature synthesis of graphene-wrapped LiFePO₄nanorod cathodes by the polyol method

Abstract

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