Perovskite framework NH<sub>4</sub>FeF<sub>3</sub>/carbon composite nanosheets as a potential anode material for Li and Na ion storage

Kong, Minhong; Liu, Kun-Hong; Ning, Jinyu; Zhou, Ji; Song, Huaihe

doi:10.1039/c7ta05466a

Cited by 31 publications

(16 citation statements)

References 60 publications

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“…On the other hand, a small excess of KOEt regarding the equivalent amount of the reagent ensures that pure KFeF 3 was obtained. Only a few studies report the direct synthesis NH 4 M (+2) F 3 (M = transition metals) phases, avoiding a high-temperature thermal treatment of typically (NH 4 ) 1+ x M (+3) F 4+ x (0 ≤ x ≤ 2) precursor phases. − The use of the very simple synthesis route reported herein can be applied to other transition metals and is not limited only to potassium but also to other B-type cations (Figure S2a,b). The perovskite crystalline framework adopting a cubic structure is well suited for facilitating the A-type ion diffusion through the large channels along the three-basis vector of the cubic lattice (Figure d).…”

Section: Resultsmentioning

confidence: 99%

Reversible Insertion in AFeF₃ (A = K⁺, NH₄⁺) Cubic Iron Fluoride Perovskites

Martin

Santiago

Kemnitz

et al. 2019

ACS Appl. Mater. Interfaces

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The search for new cathode materials is primordial for alkali-ion battery systems, which are facing a constantly growing demand for high energy density storage devices. In quest of more performing active compounds on the positive side, anhydrous iron(III) fluoride demonstrated to be a good compromise in terms of high capacity, operating voltage, and low cost. However, its reaction toward lithium leads to complicated insertion/conversion reactions, which hinder its performances in Li-ion cells. Cycling this material against larger ions such as sodium and potassium is hard or simply impossible due to the size of the channels of the FeF 3 framework impeding ions diffusion. Herein, we propose a strategy based on the use of cubic perovskite AFeF 3 (A = K + , NH 4 + ) as starting materials, allowing the straightforward insertion (after a first disinsertion of the alkali and/or NH 4 + ion) of lithium within the structure and enabling the cycling toward larger alkali ions such as sodium and potassium. For example, a cubic KFeF 3 perovskite, produced by a facile synthesis method, shows superior rate capability toward lithium retaining a capacity of up to 132 mA•h•g −1 at 5 C or of 120 mA•h•g −1 at 5 C toward sodium and enabling cycling toward potassium. Moreover, cubic NH 4 FeF 3 perovskite is discussed for the first time as the suitable cathode material for alkali-ion batteries.

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Section: Resultsmentioning

confidence: 99%

Reversible Insertion in AFeF₃ (A = K⁺, NH₄⁺) Cubic Iron Fluoride Perovskites

Martin

Santiago

Kemnitz

et al. 2019

ACS Appl. Mater. Interfaces

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“…For sodium‐ion storage, the mesoporous VN microparticles deliver a capacity of 300 mAh g −1 at 0.1 C and a capacity of 100 mAh g −1 can be achieved after 1000 cycles at 2 C. The excellent cycling performance is ascribed to unique conductive wiring networks. Recently, Kong et al synthesized NH 4 FeF 3 /CNS composites through a simple copyrolysis method. The NH 4 FeF 3 nanoparticles anchored on carbon sheets have a diameter in a range from 30 to 100 nm.…”

Section: Conversion‐type Anode Materials For Sodium‐ion Batteriesmentioning

confidence: 99%

Nanostructured Conversion‐Type Negative Electrode Materials for Low‐Cost and High‐Performance Sodium‐Ion Batteries

Wei

Wang

Tan

et al. 2018

Adv Funct Materials

146

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Emerging sodium-ion batteries (SIBs) have attracted a great attention as promising energy storage devices because of their low cost and resource abundance. Nevertheless, it is still a major challenge to develop anode materials with outstanding rate capability and excellent cycling performance. Compared to intercalation-type anode materials, conversion-type anode materials are very potential due to their high specific capacity and low cost. A new insight and summary on the recent research advances on nanostructured conversion-type anode materials for SIBs is provided herein. The corresponding synthesis methods, sodium storage properties, electrochemical mechanisms, advanced techniques on studying the crystal structures, and optimization strategies for high-performance batteries are presented. Finally, the remaining challenges and perspectives for the future development of conversion-type anode materials in the energy storage fields are proposed. Figure 17. a) Time-lapse images showing the evolution of morphology of a CuO NW at an applied voltage of −3 V during the first sodiation process. b,c) In situ TEM images showing the 1st sodiation and the 1st desodiation of the single SnO 2 nanowire, respectively. d) Time-resolved TEM images from video frames show morphology and structure evolution as a function of sodiation time and its electron diffraction (ED) patterns. Schematic and structural evolution of e,f) the V 2 O 3 ⊂C-NTs and g,h) V 2 O 3 ⊂C-NTs⊂rGO electrodes observed by in situ TEM experiments, respectively, during constant potential discharge at 5 V. i,k) The morphology evolution of two α-MoO 3 nanobelts during the first sodiation process in a low magnification, in which the red arrows denote the reaction front. j) The measured relationship between the sodiation front position and the sodiation time for above two α-MoO 3 nanobelts. l) Time-resolved TEM images from video frames show the sodiation process of an individual Co 9 S 8 -filled CNT with an open end. All scale bars are 200 nm. m) Time-resolved TEM images from video frames reveal the appearance of fractures during the electrochemical sodiation process of an individual Co 9 S 8 -filled CNT with closed ends. All scale bars are 100 nm. n) Schematic showing the setup of the in situ experiment. HAADF-STEM images showing o) pristine and p) sodiated FeF 2 NPs and q) cropped time-lapse frames throughout the sodiation process. a) Reproduced with permission. [131]

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“…; B ¼ Fe, Mn, Ni, Co, Cu, etc. ), 6,7 with the inherent threedimensional diffusion channels and a solid structure with intersecting four-sided cavity chains, 8,9 should be of great importance in developing the next-generation Li/Na-ion batteries with large capacity. In particular, large-scale batteries are expected to become commercially viable with the use of earth-abundant transition metals.…”

Section: Introductionmentioning

confidence: 99%

Morphology control and interface characteristics of well-dispersed nanomaterials in K-ion batteries

et al. 2021

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Perovskite framework NH₄FeF₃/carbon composite nanosheets as a potential anode material for Li and Na ion storage

Abstract: Perovskite framework NH4FeF3/CNS composites were prepared by an in situ co-pyrolysis method and exhibit better performance as anodes for both LIBs and SIBs.

Cited by 31 publications

References 60 publications

Reversible Insertion in AFeF₃ (A = K⁺, NH₄⁺) Cubic Iron Fluoride Perovskites

Reversible Insertion in AFeF₃ (A = K⁺, NH₄⁺) Cubic Iron Fluoride Perovskites

Nanostructured Conversion‐Type Negative Electrode Materials for Low‐Cost and High‐Performance Sodium‐Ion Batteries

Morphology control and interface characteristics of well-dispersed nanomaterials in K-ion batteries

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Perovskite framework NH4FeF3/carbon composite nanosheets as a potential anode material for Li and Na ion storage

Abstract: Perovskite framework NH4FeF3/CNS composites were prepared by an in situ co-pyrolysis method and exhibit better performance as anodes for both LIBs and SIBs.

Cited by 31 publications

References 60 publications

Reversible Insertion in AFeF3 (A = K+, NH4+) Cubic Iron Fluoride Perovskites

Reversible Insertion in AFeF3 (A = K+, NH4+) Cubic Iron Fluoride Perovskites

Nanostructured Conversion‐Type Negative Electrode Materials for Low‐Cost and High‐Performance Sodium‐Ion Batteries

Morphology control and interface characteristics of well-dispersed nanomaterials in K-ion batteries

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Perovskite framework NH₄FeF₃/carbon composite nanosheets as a potential anode material for Li and Na ion storage

Reversible Insertion in AFeF₃ (A = K⁺, NH₄⁺) Cubic Iron Fluoride Perovskites

Reversible Insertion in AFeF₃ (A = K⁺, NH₄⁺) Cubic Iron Fluoride Perovskites