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Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Na2Fe2(SO4)3"

1

Plewa, Anna, Andrzej Kulka, Dominika Baster, and Janina Molenda. "An alluaudite compounds Na2Fe2(SO4)3 vs. Na2.5Fe1.75(SO4)3 as earth abundant cathode materials for Na-ion batteries." Solid State Ionics 335 (July 2019): 15–22. http://dx.doi.org/10.1016/j.ssi.2019.02.007.

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2

Jungers, Thomas, Abdelfattah Mahmoud, Cedric Malherbe, Frederic Boschini, and Benedicte Vertruyen. "Sodium iron sulfate alluaudite solid solution for Na-ion batteries: moving towards stoichiometric Na2Fe2(SO4)3." Journal of Materials Chemistry A 7, no. 14 (2019): 8226–33. http://dx.doi.org/10.1039/c9ta00116f.

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3

Shishkin, Maxim, and Hirofumi Sato. "Ab Initio Study of Stability of Na2Fe2(SO4)3, a High Potential Na-Ion Battery Cathode Material." Journal of Physical Chemistry C 121, no. 37 (September 8, 2017): 20067–74. http://dx.doi.org/10.1021/acs.jpcc.7b02479.

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4

Nam, Yun-Chae, Seon-Jin Lee, and Jong-Tae Son. "Synthesis by Electrospinning and Electrochemical Properties of Na2Fe2(SO4)3 Nanofibers as a Cathode Material for Sodium-Ion Batteries." Journal of the Korean Physical Society 77, no. 10 (November 2020): 836–39. http://dx.doi.org/10.3938/jkps.77.836.

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5

Dwibedi, Debasmita, and Prabeer Barpanda. "Sodium Metal Sulphate Alluaudite Class of High Voltage Battery Insertion Materials." MRS Advances 3, no. 22 (2018): 1209–14. http://dx.doi.org/10.1557/adv.2018.132.

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Анотація:
ABSTRACTElectrochemical energy storage has recently seen an exponential demand in the large-scale (power) grid storage sector. Earth abundant sodium-ion batteries are competent to enable this goal with economic viability. In a recent report in sodium-ion battery research, alluaudite framework Na2Fe2(SO4)3 has been reported with the highest Fe3+/Fe2+ redox potential (ca. 3.8 V, P. Barpanda, G. Oyama, S. Nishimura, S. C. Chung, and A. Yamada., Nature Commun. 5: 4358, 2014) with energy density comparable to the state-of-the-art Li-ion batteries. Material discovery is as essential as optimization of the existing materials to yield better performance for efficient energy storage. In a goal to optimize the synthesis of the reported alluaudite, this work first time reports the aqueous based Pechini synthesis for sodium metal sulphate alluaudite. It is a two-step method, where complexing agent plays a crucial role in holding the metal ions reserving their oxidation states. In the 2nd step, this complexing agent leaves the product with porous morphology. Taking advantage of its porous as well as 3D conductive framework, the complex attains fast electron/ion transport and sodium intercalation. Moreover, the single-phase reaction mechanism during sodium intercalation is reflected in its cycling property. It performs as a desirable cathode with operating potential as high as 3.7 V. While pursuing the synthesis, we observed an excess amount of sodium sulphate in the precursor mixture is needed to reduce the amount of impurities. To optimize the composition of the alluaudite phase and to explore novel compounds, we have carefully surveyed the Na2SO4-FeSO4 binary system. This work explores the possible compositional and structural flexibility in the Pechini synthesized alluaudites. A comparative study between compositional and redox activity in these samples will further inspire improvement of the alluaudite-type sodium metal sulphates for advanced sodium-ion batteries.
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6

Dwibedi, Debasmita, Alexander V. Morozkin, Sudhindra Rayaprol, Chris D. Ling, and Prabeer Barpanda. "Magnetic Ordering of Alluaudite Na2fe2(So4)3 Sodium Battery Insertion Material." SSRN Electronic Journal, 2022. http://dx.doi.org/10.2139/ssrn.4052272.

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7

Barman, Pubali, Debasmita Dwibedi, K. Jayanthi, Sher Singh Meena, Supreeth Nagendran, Alexandra Navrotsky, and Prabeer Barpanda. "Aqueous spray-drying synthesis of alluaudite Na2+2xFe2−x(SO4)3 sodium insertion material: studies of electrochemical activity, thermodynamic stability, and humidity-induced phase transition." Journal of Solid State Electrochemistry, March 4, 2022. http://dx.doi.org/10.1007/s10008-022-05142-w.

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Анотація:
AbstractIn pursuit of high-energy density sodium insertion materials, polyanionic frameworks can be designed with tuneable high-voltage operation stemming from inductive effect. Alluaudite Na2Fe2(SO4)3 polysulfate forms one such earth-abundant compound registering the highest Fe3+/Fe2+ redox potential (ca. 3.8 V vs. Na/Na+). While this SO4-based system exhibits high voltage operation, it is prone to thermal decomposition and moisture attack leading to hydrated derivatives, making its synthesis cumbersome. Also, the Na–Fe–S–O quaternary system is rich with (anhydrous to hydrated) phase transitions. Herein, we demonstrate scalable aqueous-based spray drying synthesis of alluaudite Na2+2xFe2−x(SO4)3 sodium insertion material involving the formation of bloedite Na2Fe(SO4)2·4H2O as an intermediate phase. Moreover, a reversible phase transition from alluaudite to bloedite under controlled conditions of temperature and relative humidity is reported for the first time. Thermochemistry measurements revealed the enthalpies of formation (ΔH°f) of alluaudite and bloedite are exothermic. Hydrated bloedite (ΔH°f = −117.16 ± 1.10 kJ/mol) was found to be significantly more energetically stable than anhydrous alluaudite (ΔH°f = −11.76 ± 1.25 kJ/mol). The calorimetric data support the observed synthesis and transformation (hydration-dehydration) pathways. Spray drying route led to spherical morphology delivering capacity ~80 mAh/g. Spray drying can be extended for rapid economic synthesis of sulfate class of battery materials.
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Дисертації з теми "Na2Fe2(SO4)3"

1

Dwibedi, Debasmita. "Alluaudite Class of High-Voltage Cathodes for Sodium-Ion Battery Applications: A Synthesis, Structure, Property Correlation Study." Thesis, 2018. https://etd.iisc.ac.in/handle/2005/5295.

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Анотація:
The work presented in this thesis demonstrates alluaudites as a niche class of compounds forming the rich treasure house of sodium insertion hosts. The potential of this open frame-worked alluaudites is immense and further research will open up newer domains of applications. The current thesis work has also elucidated in-depth crystal/ magnetic structure analysis and Rietveld refinement of these novel compounds by combining X-ray, neutron and synchrotron diffraction techniques. It has also explored the synthesis of various metastable phases and polymorphism at different synthetic conditions to gauge their structural and electrochemical properties
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