Enhancing cycling performance of FeF3 cathode by introducing a lightweight high conductive adsorbable interlayer

Zhou, Xiangyang; Sun, Hongxu; Zhou, Haidong; Xu, Zhanglin; Yang, Juan

doi:10.1016/j.jallcom.2017.06.266

Cited by 14 publications

(6 citation statements)

References 45 publications

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“…Figure 6c shows the equivalent electrical circuit of the Nyquist curves, where R s is the ohmic resistance; R ct is the charge transfer resistance, which reflects the electrochemical kinetics of the cell reactions; W is the Warburg impedance caused by the diffusion of Na + in the electrode material; and CPE is the constant phaseangle element associated with the surface layer and the electric double layer. 48,49 Nyquist plots are fitted as the red smooth curves (Figures 6a-6b), and the fitting impedance data are good consistent with the experimental EIS data. As being seen from Table II, FeF 3 • 0.33H 2 O has a high charge transfer impedance, and the R ct values at the different cycle numbers are 97, 192, 314 at 1 st , 50 th , 100 th , reespectively.…”

Section: Resultssupporting

confidence: 65%

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: Resultssupporting

confidence: 65%

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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“…And the rapid insertion/deintercalation of Li + would cause the volume of FeF 3 to change constantly, resulting in the collapse of crystal structure. [2,10,83,84] The Rs of assembled batteries for F00, FC0 and FCN are 2.3, 1.9 and 3.3 Ω, respectively. Meanwhile, FC0 and FCN exhibit a larger capacity of about 152.1 and 184.9 mAh g À 1 , respectively, with long and stable platforms.…”

Section: Electrochemical Performancementioning

confidence: 99%

“…The ohmic resistance (Rs) corresponding to Li + transport in the electrolyte, a resistance (Rct) and a constant phase element (CPE) relate to the charge transfer resistance at the interface of electrode-electrolyte, Wo is the Warburg impedance associated with Li + diffusion in the FeF 3 particles. [2,10,83,84] The Rs of assembled batteries for F00, FC0 and FCN are 2.3, 1.9 and 3.3 Ω, respectively. The similar Rs values due to the same electrolyte and the same assembly components.…”

Section: Electrochemical Performancementioning

confidence: 99%

Improved Electrochemical Performance of FeF₃ by Inlaying in a Nitrogen‐Doped Carbon Matrix

Zhu

et al. 2019

ChemElectroChem

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FeF 3 is favored by researchers because of its high theoretical specific capacity and high voltage. It is expected to be utilized as a cathode material for lithium-ion batteries in the future. However, the poor electronic conductivity, inferior reaction kinetics, and severe volume expansion seriously prevents its practical application. Herein, a FeF 3 @N-doped carbon nanocomposite was successfully produced by in situ fluorination and dehydration. In addition, the nanocomposite showed a reversible capacity of 84.9 mAh g À 1 for 200th cycle after cycling at a high current of 2 C, which is approximately 300 times higher than that of bare FeF 3 . Benefitting from the N-doped carbon matrix, the composite electrodes exhibited minor transfer resistance (117.4 Ω, only 44.0 % of that of bare FeF 3 ) and very low polarization voltage (ca. 0.19 V). Meanwhile, it provided a buffer for volume expansion during the insertion of Li + and maintained cycling stability. This work can supply a simple pathway for designing ultrahigh-rate and long-life FeF 3 cathode materials.

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“…Developing in-situ generation of conductive carbon matrix around FeF x nanoparticles is an effective way to overcome the problems of low electronic conductivity, volume change and Fe dissolution. [89] A hierarchical carbon wrapped FeF 3 • 0.33H 2 O@C nanocomposites with pomegranate structure by hydrothermal and solid-state methods was fabricated (Figure 4a). [90] The heterogeneous carbon structure with pomegranate structure effectively reduces the electrochemical polarization, creating an elastic buffer space to alleviate the volume expansion during the lithiation.…”

Section: Conductive Matrixmentioning

confidence: 99%

Toward High Energy Density FeF_x (x=2 and 3) Cathodes for Lithium‐Ion Batteries

et al. 2023

Batteries & Supercaps

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It has been challenging to develop next‐generation higher energy density cathode materials to satisfy the incremental demand for lightweight and miniaturization for lithium‐ion batteries (LIBs). The iron‐based fluoride (FeFx) cathodes may be highly competitive due to abundant resources as well as high theoretical capacity. However, the complex multiphase conversion reactions of the FeFx cathodes cause limited battery performance hindering its commercialization. Herein, this review focuses on the multi‐electron conversion processes involved in solid‐solid reactions. More importantly, the scientific strategies of enhanced FeFx performance are mainly addressed in view of four critical aspects, i. e., conductive matrix, heteroatom doping, surface modification, and electrolyte engineering. It is demonstrated that the optimized strategies can mitigate the challenges of the FeFx cathodes during multi‐electron conversion processes. It is believed that this review has been a guidance for improving the cycling performance of the FeFx cathodes for high energy density LIBs.

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Enhancing cycling performance of FeF3 cathode by introducing a lightweight high conductive adsorbable interlayer

Cited by 14 publications

References 45 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

Improved Electrochemical Performance of FeF₃ by Inlaying in a Nitrogen‐Doped Carbon Matrix

Toward High Energy Density FeF_x (x=2 and 3) Cathodes for Lithium‐Ion Batteries

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Enhancing cycling performance of FeF3 cathode by introducing a lightweight high conductive adsorbable interlayer

Cited by 14 publications

References 45 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

Improved Electrochemical Performance of FeF3 by Inlaying in a Nitrogen‐Doped Carbon Matrix

Toward High Energy Density FeFx (x=2 and 3) Cathodes for Lithium‐Ion Batteries

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Product

Resources

About

Improved Electrochemical Performance of FeF₃ by Inlaying in a Nitrogen‐Doped Carbon Matrix

Toward High Energy Density FeF_x (x=2 and 3) Cathodes for Lithium‐Ion Batteries