Dipole Ordering and the Ionic Conductivity in Na3Fe2(PO4)3-Type NASICON-Like Structures

Nogai, A. S.; Stefanovich, S. Yu.; Солиходжа, Ж.М.; Uskenbaev, D. E.

doi:10.1134/s1063783420080259

Cited by 8 publications

(13 citation statements)

References 10 publications

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“…The determination of the conducting and dielectric properties of the synthesized samples was carried out by the method of impedance spectroscopy using the VM-507 and VM-538 impedance meters in the temperature range of 295-573 K, in the frequency range 5-5 • 10 5 and 5 • 10 5 -10 8 Hz respectively [11].…”

Section: Experimental Partmentioning

confidence: 99%

“…Based on the experimental data of the polycrystal impedance, the specific conductivity of the crystallites ( σ cr ) of polycrystalline samples were calculated according to the formula [11]:…”

Section: Experimental Partmentioning

confidence: 99%

“…It is established that when α -Na 3 Fe 2 (PO 4 ) 3 is heated, successive phase transitions α → β occur from the monoclinic α -phase ( C2/m ) to the rhombohedral ( 3Rc ) β -phase, which has superstructural reflexes. Superstructural reflexes disappear during the phase transition of β → γ to the rhombohedral γ -phase [8,9,11]. For α -Na 3 Fe 2 (PO 4 ) 3 is characterized by the presence of a superstructural unit cell with an antiferroelectric type of dipole ordering, although in the γ -phase Na 3 Fe 2 (PO 4 ) 3 is in the superionic condition [11].…”

Section: Introductionmentioning

confidence: 99%

“…Superstructural reflexes disappear during the phase transition of β → γ to the rhombohedral γ -phase [8,9,11]. For α -Na 3 Fe 2 (PO 4 ) 3 is characterized by the presence of a superstructural unit cell with an antiferroelectric type of dipole ordering, although in the γ -phase Na 3 Fe 2 (PO 4 ) 3 is in the superionic condition [11].…”

Section: Introductionmentioning

confidence: 99%

“…The cathode based Na 2 FePO 4 F can provide up to 110 mAh/g −1 , energy consumption in the SIB, as well as stable cycling and low volume change during intercalation and deintercalation processes [14,15]. It was considered that the crystal framework of β -Na 2 FePO 4 F at room temperature has an orthorhombic syngony (e.g., Pbcn ) and a layered structure [5][6][7][8][9][10][11][12][13][14][15][16]. The crystal framework Na 2 FePO 4 F is characterized by the presence of two-dimensional layers of chains connected along the vertices of the Fe 2 O 6 F 3 bioctahedra along the crystal direction a [100], connected by PO 4 tetrahedra in the crystal direction c [001].…”

Section: Introductionmentioning

confidence: 99%

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Conducting and dielectric properties of Na3Fe2(PO4)3 and Na2FePO4F

Nogai

Salikhodzha

Uskenbaev

2021

Eurasian J. Phys. Funct. Mater.

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In this research, the structure parameters, conducting and dielectric properties of Na3Fe2(PO4)3 and Na2FePO4F polycrystals were studied obtained by solid-phase synthesis. The phase transition temperatures, conducting and dielectric parameters of Na3Fe2(PO4)3 and Na2FePO4F polycrystals were refined. A comparative evaluation of the conductive properties of Na3Fe2(PO4)3 and Na2FePO4F polycrystals is given in this article. The prospects of using of Na3Fe2(PO4)3 and Na2FePO4F are justified as electrode materials in sodium ion batteries.

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Section: Experimental Partmentioning

confidence: 99%

Section: Experimental Partmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Conducting and dielectric properties of Na3Fe2(PO4)3 and Na2FePO4F

Nogai

Salikhodzha

Uskenbaev

2021

Eurasian J. Phys. Funct. Mater.

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Progress on Fe‐Based Polyanionic Oxide Cathodes Materials toward Grid‐Scale Energy Storage for Sodium‐Ion Batteries

et al. 2022

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The development of large‐scale energy storage systems (EESs) is pivotal for applying intermittent renewable energy sources such as solar energy and wind energy. Lithium‐ion batteries with LiFePO4 cathode have been explored in the integrated wind and solar power EESs, due to their long cycle life, safety, and low cost of Fe. Considering the penurious reserve and regional distribution of lithium resources, the Fe‐based sodium‐ion battery cathodes with earth‐abundant elements, environmental friendliness, and safety appear to be the better substitutes in impending grid‐scale energy storage. Compared to the transition metal oxide and Prussian blue analogs, the Fe‐based polyanionic oxide cathodes possess high thermal stability, ultra‐long cycle life, and adjustable voltage, which is more commercially viable in the future. This review summarizes the research progress of single Fe‐based polyanionic and mixed polyanionic oxide cathodes for the potential sodium‐ion batteries EESs candidates. In detail, the synthesized method, crystal structure, electrochemical properties, bottlenecks, and optimization method of Fe‐based polyanionic oxide cathodes are discussed systematically. The insights presented in this review may serve as a guideline for designing and optimizing Fe‐based polyanionic oxide cathodes for coming commercial sodium‐ion batteries EESs.

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