Iron (II) fluoride cathode material derived from MIL-88A

Butova, Vera V.; Aboraia, Abdelaziz M.; Шаповалов, В. В.; Dzhangiryan, Narek A.; Papkovskaya, Elizaveta D.; Il’in, O. I.; Кубрин, С. П.; Guda, Alexander A.; Солдатов, А. А.

doi:10.1016/j.jallcom.2022.165438

Cited by 12 publications

(6 citation statements)

References 60 publications

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“…These peaks indicate the presence of MA-PDMS in the composite membrane. Two peaks at 1390 and 1600 cm –1 are attributed to symmetric and asymmetric vibrations of the COO – groups, respectively. , The peak at 640 cm –1 could be assigned as the bending vibrations of the O–C–O group, and the peak at 560 cm –1 corresponds to the stretching vibration of Fe–O bonds . These peaks demonstrate that MIL-88A crystals exist stably in the composite membrane.…”

Section: Resultsmentioning

confidence: 87%

“…21,22 The peak at 640 cm −1 could be assigned as the bending vibrations of the O−C−O group, and the peak at 560 cm −1 corresponds to the stretching vibration of Fe−O bonds. 23 These peaks demonstrate that MIL-88A crystals exist stably in the composite membrane. Altogether, the asymmetric membrane consists of MIL-88A and MA-PDMS.…”

Section: Characterization Of Mil-88a/ma-pdms MMMmentioning

confidence: 94%

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Asymmetric Metal–Organic Framework-Based Mixed Matrix Membrane for Reversible Self-Assembling 3D Architecture

Zhang

Cui

et al. 2023

ACS Appl. Polym. Mater.

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Shape-transformation metal–organic framework (MOF)-based soft actuators that can quickly respond to external stimuli have been potential candidates in the areas of biomimetic soft robots, smart mechanical devices, and flexible devices. Herein, we construct a unique asymmetric mixed matrix membrane (MMM) consisting of swellable iron(III) fumarate (MIL-88A, MIL= Materials from Institute Lavoisier) on one side and methacrylate-functionalized polydimethylsiloxane (MA-PDMS) on the other side. Upon variation of the humidity environment, the asymmetric composite membrane exhibits reversible and repeatable bending behavior. Through simple graphical programming, the composite membrane obtains a self-folding ability and successfully realizes diversified predictable 3D architectures, including artificial flowers, automatic mechanical claws, and unilateral crawling devices. Moreover, the 3D architecture could be restored to a 2D plane through the desorption of MIL-88A and the thermal expansion of MA-PDMS derived from near-infrared (NIR) light and exhibit continuous motion to imitate living creatures in nature. This work will offer insight into the fabrication of programmable soft actuators, thus shining enlightenment for their potential application in bioinspired soft robots and smart mechanical devices.

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Section: Resultsmentioning

confidence: 87%

Section: Characterization Of Mil-88a/ma-pdms MMMmentioning

confidence: 94%

Asymmetric Metal–Organic Framework-Based Mixed Matrix Membrane for Reversible Self-Assembling 3D Architecture

Zhang

Cui

et al. 2023

ACS Appl. Polym. Mater.

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“…4g, Table S1 †). 14,[29][30][31][32][33][34][35][36][37][38] Furthermore, the overpotential of PBC@FeF 2 @C, calculated from the middle points of the charge/discharge capacities, is drastically reduced in the initial cycles and stabilizes at 0.56 V (a substantially low level for fluoride chemistries) 11 over long cycling (Fig. 4h, Fig.…”

Section: Figmentioning

confidence: 99%

“…1a), is believed to be a promising approach. [28][29][30][31][32][33][34][35][36][37][38][39] It not only alleviates the dissolution, but also tailors the electronic and ionic properties. Yet, performance enhancement has still heavily relied on the intricate optimization of both material structures, elec-trode components, and electrolyte formulations.…”

Section: Introductionmentioning

confidence: 99%

Covalent netting restrains dissolution enabling stable high-loading and high-rate iron difluoride cathodes

Wang

et al. 2023

Nanoscale

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“…In this work, we address this knowledge gap by using microwave synthesis to create a core@shell FeF 2 @C composite composed of nanoscopic FeF 2 particles surrounded by a thin, but encasing, layer of carbon that is only 5.4 wt % of the composite. This is a significantly lower intrinsic C content than that of many similar core@shell FeF 2 /C composites and positions the material to have high energy density. , We investigate the as-synthesized material using a variety of techniques, including X-ray diffraction spectroscopy (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), high-resolution transmission electron microscopy (HRTEM), and others and show that the material is a composite of ∼35 nm crystalline FeF 2 particles surrounded by a ∼2 nm thick layer of N-containing amorphous aromatic carbon. Tested as a cathode in a Li metal battery, the FeF 2 @C shows a capacity of 634 mAh/g active after 50 cycles (at C/20), provides good rate performance (200 mAh/g at 1C-rate), and demonstrates good capacity retention (capacity loss of less than 20 mAh/g over 200 cycles at C/2).…”

Section: Introductionmentioning

confidence: 99%

Nanoparticulate FeF₂@C as a Li Battery Conversion Cathode

Wygant

Schorr

Kolesnichenko

et al. 2022

ACS Appl. Energy Mater.

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The high theoretical capacity (571 mAh/g) and energy density (1519 Wh/kg) of iron difluoride (FeF 2 ) make it a promising conversion cathode material for use in Li-based batteries, provided inherent limitations related to material conductivity and reactivity are surmountable. In this work, we report a simple synthesis to produce crystalline FeF 2 particles approximately 35 nm in diameter surrounded by a thin carbon shell (FeF 2 @C) and demonstrate its excellent performance as a cathode in Li metal batteries. Characterization of the FeF 2 @C shows that the C-shell is 2−3 nm thick and composed of amorphous conjugated carbon with a nitrogen content of 3.8%, largely in the form of pyridinic moieties. When paired with a Li metal anode, the FeF 2 @C composite cathodes exhibit excellent specific capacity and retention, 634 mAh/g FeF2@C after 50 cycles at C/20, compared to 234 mAh/g FeF2 when a cathode containing commercial FeF 2 was used. The material also shows excellent rate performance and, at a 1C charge/discharge rate, demonstrates a capacity greater than that of common intercalation cathodes like LiFePO 4 . We attribute the performance of the FeF 2 @C to improved lithiation/delithiation behavior due to the nanoscale FeF 2 particles, increased protection from chemical and electrochemical damage, improved conductivity and capacity granted by the C-shell, and additional capacity from the in situ formation of FeF 3 during cycling. After electrochemical cycling, ex situ analysis of the FeF 2 @C material shows that while a roughly 2−8 nm cathode electrolyte interphase (CEI) forms on the surface of the particles, the underlying material retains its initial nanostructure and FeF 2 -characteristics.

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Iron (II) fluoride cathode material derived from MIL-88A

Cited by 12 publications

References 60 publications

Asymmetric Metal–Organic Framework-Based Mixed Matrix Membrane for Reversible Self-Assembling 3D Architecture

Asymmetric Metal–Organic Framework-Based Mixed Matrix Membrane for Reversible Self-Assembling 3D Architecture

Covalent netting restrains dissolution enabling stable high-loading and high-rate iron difluoride cathodes

Nanoparticulate FeF₂@C as a Li Battery Conversion Cathode

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Iron (II) fluoride cathode material derived from MIL-88A

Cited by 12 publications

References 60 publications

Asymmetric Metal–Organic Framework-Based Mixed Matrix Membrane for Reversible Self-Assembling 3D Architecture

Asymmetric Metal–Organic Framework-Based Mixed Matrix Membrane for Reversible Self-Assembling 3D Architecture

Covalent netting restrains dissolution enabling stable high-loading and high-rate iron difluoride cathodes

Nanoparticulate FeF2@C as a Li Battery Conversion Cathode

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Nanoparticulate FeF₂@C as a Li Battery Conversion Cathode