Fluoride based electrode materials for advanced energy storage devices

Amatucci, Glenn G.; Pereira, Nathalie

doi:10.1016/j.jfluchem.2006.11.016

Cited by 389 publications

(307 citation statements)

References 113 publications

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“…5 Such attributes could potentially lead to FeF2 cathodes displaying considerably higher energy densities compared to their 10 intercalation analogues. The potentially high energy density may, however, be somewhat restrained as FeF2 exhibits known Mottinsulator properties.…”

Section: Introductionmentioning

confidence: 99%

“…Typically, 0.2 g of [Co(hfac)2.2H2O] precursor was dissolved in toluene (15 ml) and sonicated for 3-5 min, before being injected into a sealed stainless steel reaction cell (24 ml total volume, High Pressure Equipment (HIP) company), and heated to 400 °C at a heating rate of 30 °C min -1 and held at this temperature for 1 h. After 1 h, the reaction 5 cell was cooled to room temperature and slowly depressurised. The CoF2 product was isolated by means of decantation, washed with acetone to remove trace impurity and excess solvent and airdried at room temperature for at least 24 h forming the final pink coloured powder.…”

mentioning

confidence: 99%

“…In the case of FeF2, a temperature of 400 °C was used to attain supercritical conditions (toluene) which likely facilitated a similar 5 decomposition process of the [Fe(tta)3] precursor. TGA analysis of the [Fe(tta)3] precursor collected under flowing N2 depicts a two-phase transition process resulting in the complete decomposition of the precursor over the temperature range between 400 -450 °C.…”

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confidence: 99%

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Supercritical-fluid synthesis of FeF2 and CoF2 Li-ion conversion materials

et al. 2013

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The synthesis of the Li-ion conversion candidates, FeF2 and CoF2, obtained from the single source organometallic precursors [Fe(tta)3] (tta = C8H4F3O2S), and [Co(hfac)2[middle dot]2H2O] (hfac = C5H1F6O2), respectively, via a novel supercritical fluid (SCF) method is presented. The nature of the synthesis led to highly-crystalline FeF2 and CoF2 powders requiring no additional thermal treatment. The as-obtained powders were investigated for use as potential positive Li-ion conversion electrodes by means of chronopotentiometric measurements. The FeF2 cells displayed high initial capacities following electrochemical conversion (up to [similar]1100 mA h g-1 at a potential of 1.0 V vs. Li/Li+), with appreciable cyclic behaviour over 25 discharge-charge cycles. The deposition of a [similar]5 nm layer of amorphous carbon onto the surface of the active material following SCF treatment, likely facilitated adequate electron transport through an otherwise poorly conducting FeF2 phase. Similarly, CoF2 cells displayed high initial capacities (up to [similar]650 mA h g-1 at a potential of 1.2 V vs. Li/Li+), although significant capacity fading ensued in the subsequent cycles. Ex situ XRD measurements confirmed a poor reversibility in the conversion sequence for CoF2, with a complete loss of CoF2 crystallinity and the sole presence of a crystalline LiF phase following charging

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Supercritical-fluid synthesis of FeF2 and CoF2 Li-ion conversion materials

et al. 2013

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“…Initial investigations look promising that AlF 3 can be used as a high-capacity reversible electrode material. If this is not the case, it can still be used as an alternative low-cost material in primary batteries as it has a specific energy density comparable to carbon fluoride primary batteries [18,23].…”

Section: Resultsmentioning

confidence: 99%

Investigations of aluminum fluoride as a new cathode material for lithium-ion batteries

Owen

Zhang

2017

J Appl Electrochem

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“…1 FeF 2 , on the other hand, has no insertion reaction and shows only a conversion reaction with a 2 V plateau. 5 This discharge reaction of FeF 2 is slightly different from that of FeF 3 , but FeF 2 also become LiF and metal Fe after the conversion reaction.…”

Section: ¹1mentioning

confidence: 99%

Reconversion Reaction of LiF/Fe Composite Thin Film Cathodes for Lithium-Ion Battery

Hori

Okada

2015

Electrochemistry

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The reconversion reaction of lithium fluoride (LiF)/iron (Fe) nanocomposite thin film cathodes prepared with the codeposition method was investigated at room temperature. The LiF:Fe in molar ratio of 1:1 composite thin film was able to be discharged with large capacity of 300 mAh g −1 after the reconversion reaction on the first charge at 25°C. After the 2nd cycle, it showed relatively stable reversible capacity more than 200 mAh g −1 . The discharge profile with 2 V plateau was similar to that of ferrous fluoride (FeF 2 ), and the trace of FeF 2 was detected in the fully-charged LiF/Fe nanocomposite thin film by X-ray photoelectron spectroscopy (XPS). These results suggest that the reconversion reaction from LiF/Fe to FeF 2 proceeded successfully on the first charge as we expected.

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Fluoride based electrode materials for advanced energy storage devices

Cited by 389 publications

References 113 publications

Supercritical-fluid synthesis of FeF2 and CoF2 Li-ion conversion materials

Supercritical-fluid synthesis of FeF2 and CoF2 Li-ion conversion materials

Investigations of aluminum fluoride as a new cathode material for lithium-ion batteries

Reconversion Reaction of LiF/Fe Composite Thin Film Cathodes for Lithium-Ion Battery

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