A cathode material for lithium-ion batteries based on graphitized carbon-wrapped FeF<sub>3</sub> nanoparticles prepared by facile polymerization

Kim, T.; Jae, Woojin; Kim, H.; Park, M.; Han, Jae-Il; Kim, J.

doi:10.1039/c6ta06696h

Cited by 58 publications

(53 citation statements)

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“…The first anodic peak appears at ∼2.71 V, which is ascribed to the intercalation of Na + into the iron fluoride crystal (FeF 3 +Na→NaFeF 3 ); and the second anodic peak located in ∼2.05 V is mainly caused by the conversion reaction of Fe 2+ to Fe 0 (NaFeF 3 +2Na→Fe+3NaF). 45,46 It is noticed that the subsequent cycles show the consistent peak position of the redox reaction, suggesting the good reversibility of the electrode reaction. Moreover, the electrochemical reversibility of the electrode reaction is usually evaluated using the potential difference ( Ep) between the anode peak and the cathode peak.…”

Section: Resultsmentioning

confidence: 98%

Iron Fluoride Packaged into 3D Order Mesoporous Carbons as High-Performance Sodium-Ion Battery Cathode Material

Zhang

Wang

et al. 2018

J. Electrochem. Soc.

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The FeF 3 · 0.33H 2 O nanoparticles packaged into three-dimensional order mesoporous carbons (3D-OMCs) as cathode material of sodium-ion batteries (SIBs) was deliberately designed and fabricated by a facile nanocasting technique and mesoporous silica KIT-6 template. The structure, morphology, elemental distribution and electrochemical performance of FeF 3 · 0.33H 2 O@3D-OMCs nanocomposite are investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscope (TEM), energy-dispersive X-ray spectroscope (EDS), Raman spectroscopy and electrochemical measurement. The results show that the as-synthesized FeF 3 · 0.33H 2 O nanoparticles are perfectly packaged in 3D-OMCs matrix, and the size and morphology of FeF 3 · 0.33H 2 O nanoparticles can be effectively controlled. Furthermore, it has been found that the FeF 3 · 0.33H 2 O@3D-OMCs nanocomposite can deliver a high first discharge capacity of 386 mAh g −1 and excellent capacity reservation after 100 cycles at a rate of 20 mA g −1 in the voltage range of 1.0-4.0 V. Especially, even up to 100 mA g −1 , the discharge capacity is still as high as 201 mAh g −1 , indicating a remarkable rate capability. The excellent electrochemical properties of FeF 3 · 0.33H 2 O@3D-OMCs nanocomposite can be because the 3D mesoporous structure of 3D-OMCs can provide an expressway of electron transfer for Na + insertion/extraction, and alleviate the drastic volume variation of FeF 3 · 0. In recently years, lithium-ion batteries (LIBs) have been generally used as an effective energy storage approach in the consumer electronics and electric vehicles (EVs) because of their high energy density, long cycle life and environmentally friendly.1,2 However, the limited resource and high price of lithium salts restrict its further application and development, thus seeking alternative new energy materials have become a hot topic of concern and research. Sodium ion batteries (SIBs) have aroused considerable attention owing to the same high energy density as LIBs, abundant sodium resource, low price and appropriate redox potential for battery applications (E Na + /Na = −2.71 V only 0.3 V above that of lithium). [3][4][5] In addition, sodium, as the second lightest and smallest alkali metal next to lithium, is similar to lithium in physical and chemical properties.

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Section: Resultsmentioning

confidence: 98%

Iron Fluoride Packaged into 3D Order Mesoporous Carbons as High-Performance Sodium-Ion Battery Cathode Material

Zhang

Wang

et al. 2018

J. Electrochem. Soc.

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“…The weight loss took place mainly between 120 C and 500 C, which should be ascribed to the combustion of carbon and the conversion reaction from FeF 3 to Fe 2 O 3 . 37 The total weight loss is observed to be 51.50%. According to the TG curve and the nal residue (Fe 2 O 3 ), the weight percentage of FeF 3 active materials in the sample was estimated to be about 67.53%.…”

Section: 4041mentioning

confidence: 91%

“…It is clear that the peak is located at about 685.0 eV, which suggests the presence of the Fe 3+ -F bond. 37 As shown in Fig. S3d (ESI †), the XPS spectrum of the Fe 2p3/2 region shows a peak at about 713.6 eV, which suggests the +3 oxidation states of iron in the materials.…”

Section: 4041mentioning

confidence: 99%

“…S3d (ESI †), the XPS spectrum of the Fe 2p3/2 region shows a peak at about 713.6 eV, which suggests the +3 oxidation states of iron in the materials. 37 These results conrm the products as FeF 3 and further ascertain the composition of the amorphous sample. Fig.…”

Section: 4041mentioning

confidence: 99%

“…2b). 37 In order to reveal the particle size and morphology of the products, SEM measurements were also carried out, as shown in Fig. 3a and b.…”

Section: Electrochemical Measurementmentioning

confidence: 99%

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Amorphous FeF₃/C nanocomposite cathode derived from metal–organic frameworks for sodium ion batteries

Zhang

et al. 2017

RSC Adv.

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Hetero‐Packing Nanostructures of Iron (III) Fluoride Nanocomposite Cathode for High‐Rate and Long‐Life Rechargeable Lithium‐Ion Batteries

Guan

Zhao

Zhou

et al. 2023

Advanced Energy Materials

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High‐performance metal fluoride cathodes are crucial to design ultrahigh‐capacity lithium metal batteries for taking part in the next‐generation energy storage market. However, their insulating nature and sluggish reaction kinetics result in voltage hysteresis, low‐rate capability, and rapid capacity degradation. Herein, a generalizable one‐step melt synthesis approach is reported to construct hetero‐packing nanostructures of FeF3@C‐Asphalt nanocomposites, where ultrafine FeF3 nanoparticles are homogeneously covered by a high conductive carbon framework. By the electrochemical kinetics calculation and multiphysics simulations, this FeF3@C‐Asphalt nanocomposites consist of ultrafine nanoparticles and a constrained carbon framework, offering a high tap density (1.8 g cm−3), significantly improved conductivity, and enhanced charge pathways, and thereby enabling the fast electron transport, rapid ion migration, depressed electrode internal stress, and mitigated volume expansion. As a result, the optimized FeF3@C‐Asphalt cathode delivers a high capacity of 517 mAh g−1, high cyclic stability of 87.5% after 1000 cycles under 5 A g−1 (10 C), and excellent capacity retention of 77% from 0.5 A g−1 to 10 A g−1 (20 C, 250 mAh g−1). The work provides an easy‐to‐operate and low‐cost approach to accomplish high cyclic stability metal fluoride‐lithium batteries, which will guide the development of fast‐charging ultrahigh‐capacity cathode materials for the new energy industry.

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A cathode material for lithium-ion batteries based on graphitized carbon-wrapped FeF₃ nanoparticles prepared by facile polymerization

Abstract: FeF3/graphitic carbon composites are successfully synthesized, showing high electrochemical performances as a cathode material for Li-ion batteries.

Cited by 58 publications

References 50 publications

Iron Fluoride Packaged into 3D Order Mesoporous Carbons as High-Performance Sodium-Ion Battery Cathode Material

Iron Fluoride Packaged into 3D Order Mesoporous Carbons as High-Performance Sodium-Ion Battery Cathode Material

Amorphous FeF₃/C nanocomposite cathode derived from metal–organic frameworks for sodium ion batteries

Hetero‐Packing Nanostructures of Iron (III) Fluoride Nanocomposite Cathode for High‐Rate and Long‐Life Rechargeable Lithium‐Ion Batteries

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A cathode material for lithium-ion batteries based on graphitized carbon-wrapped FeF3 nanoparticles prepared by facile polymerization

Abstract: FeF3/graphitic carbon composites are successfully synthesized, showing high electrochemical performances as a cathode material for Li-ion batteries.

Cited by 58 publications

References 50 publications

Iron Fluoride Packaged into 3D Order Mesoporous Carbons as High-Performance Sodium-Ion Battery Cathode Material

Iron Fluoride Packaged into 3D Order Mesoporous Carbons as High-Performance Sodium-Ion Battery Cathode Material

Amorphous FeF3/C nanocomposite cathode derived from metal–organic frameworks for sodium ion batteries

Hetero‐Packing Nanostructures of Iron (III) Fluoride Nanocomposite Cathode for High‐Rate and Long‐Life Rechargeable Lithium‐Ion Batteries

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A cathode material for lithium-ion batteries based on graphitized carbon-wrapped FeF₃ nanoparticles prepared by facile polymerization

Amorphous FeF₃/C nanocomposite cathode derived from metal–organic frameworks for sodium ion batteries