Conductivity improvements to spray-produced LiFePO4 by addition of a carbon source

Bewlay, S.; Konstantinov, Konstantin; Wang, Guoxiu; Dou, Shi Xue; Liu, Huan

doi:10.1016/j.matlet.2003.11.008

Cited by 185 publications

(113 citation statements)

References 8 publications

(10 reference statements)

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“…Alternatively, significant effort has been devoted to coating the LFP surfaces with electrically conductive materials, such as amorphous carbon and conducting polymers to ARTICLE enhance the electrical conductivity of LFP surfaces [27][28][29][30][31][32] . Recent studies have adopted rGO or GO to cover the LFP surfaces [16][17][18][19] .…”

Section: Resultsmentioning

confidence: 99%

Graphene-modified LiFePO4 cathode for lithium ion battery beyond theoretical capacity

Lin

et al. 2013

Nat Commun

512

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The specific capacity of commercially available cathode carbon-coated lithium iron phosphate is typically 120-160 mAh g À 1 , which is lower than the theoretical value 170 mAh g À 1 . Here we report that the carbon-coated lithium iron phosphate, surface-modified with 2 wt% of the electrochemically exfoliated graphene layers, is able to reach 208 mAh g À 1 in specific capacity. The excess capacity is attributed to the reversible reduction-oxidation reaction between the lithium ions of the electrolyte and the exfoliated graphene flakes, where the graphene flakes exhibit a capacity higher than 2,000 mAh g À 1 . The highly conductive graphene flakes wrapping around carbon-coated lithium iron phosphate also assist the electron migration during the charge/discharge processes, diminishing the irreversible capacity at the first cycle and leading to B100% coulombic efficiency without fading at various C-rates. Such a simple and scalable approach may also be applied to other cathode systems, boosting up the capacity for various Li batteries.

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Section: Resultsmentioning

confidence: 99%

Graphene-modified LiFePO4 cathode for lithium ion battery beyond theoretical capacity

Lin

et al. 2013

Nat Commun

512

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“…The high-temperature performance is also a critical issue because batteries may be operated at elevated temperatures (around 60˚C). The early drawback of highly resistive LiFePO 4 has been resolved by painting the particle surface with carbon [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrochemical Properties of LiFePO<sub>4</sub> as Positive Electrode of Li-Ion Batteries for HEV Application

Julien¹,

Zaghib²,

Mauger³

et al. 2012

ACES

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LiFePO 4 materials synthesized using FePO 4 (H 2 O) 2 and Li 2 CO 3 blend were optimized in view of their use as positive electrodes in Li-ion batteries for hybrid electric vehicles. A strict control of the structural properties was made by the combination of X-ray diffraction, FT-infrared spectroscopy and magnetometry. The impact of the ferromagnetic clusters (γ-Fe 2 O 3 or Fe 2 P) on the electrochemical response was examined. The electrochemical performances of the optimized LiFePO 4 powders investigated at 60˚C are excellent in terms of capacity retention (153 mAh·g -1 at 2C) as well as in terms of cycling life. No iron dissolution was observed after 200 charge-discharge cycles at 60˚C for cells containing Li foil, Li 4 Ti 5 O 12 , or graphite as negative electrodes.

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“…The electrochemical performance of the electrode is greatly influenced by the particle size and the morphology of the particles [27]. The scanning electron microscopy (SEM) images of the LiFePO 4 /C and LiYb 0.02 Fe 0.98 PO 4 /C composites are shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical performance of Yb-doped LiFePO4/C composites as cathode materials for lithium-ion batteries

Göktepe

2012

Res Chem Intermed

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LiFePO 4 /C and LiYb 0.02 Fe 0.98 PO 4 /C composite cathode materials were synthesized by simple solution technique. The samples were characterized by X-ray diffraction, scanning electron microscope, and thermogravimetric-differential thermal analysis. Their electrochemical properties were investigated by cyclic voltammetry, four-point probe conductivity measurements, and galvanostatic charge and discharge tests. The carbon-coated and Yb 3? -doped LiFePO4 sample exhibited an enhanced electronic conductivity of 1.9 9 10 -3 Scm -1 , and a specific discharge capacity of 146 mAhg -1 at 0.1 C. The results suggest that the improvement of the electrochemical performance can be attributed to the ytterbium doping, which facilitates the phase transformation between triphylite and heterosite during cycling, and the conductivity improvement by carbon coating.

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Conductivity improvements to spray-produced LiFePO4 by addition of a carbon source

Cited by 185 publications

References 8 publications

Graphene-modified LiFePO4 cathode for lithium ion battery beyond theoretical capacity

Graphene-modified LiFePO4 cathode for lithium ion battery beyond theoretical capacity

Enhanced Electrochemical Properties of LiFePO<sub>4</sub> as Positive Electrode of Li-Ion Batteries for HEV Application

Electrochemical performance of Yb-doped LiFePO4/C composites as cathode materials for lithium-ion batteries

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Conductivity improvements to spray-produced LiFePO4 by addition of a carbon source

Cited by 185 publications

References 8 publications

Graphene-modified LiFePO4 cathode for lithium ion battery beyond theoretical capacity

Graphene-modified LiFePO4 cathode for lithium ion battery beyond theoretical capacity

Enhanced Electrochemical Properties of LiFePO&lt;sub&gt;4&lt;/sub&gt; as Positive Electrode of Li-Ion Batteries for HEV Application

Electrochemical performance of Yb-doped LiFePO4/C composites as cathode materials for lithium-ion batteries

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Enhanced Electrochemical Properties of LiFePO<sub>4</sub> as Positive Electrode of Li-Ion Batteries for HEV Application