Mixed Valence Nasicon: a new conductor material

Tillement, Olivier; Couturier, Jean-Claude; Angenault, J.; Quarton, M.

doi:10.1016/b978-0-444-89354-3.50075-1

Cited by 11 publications

(21 citation statements)

References 6 publications

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“…Desodiated structures with Na/vacancy orderings were prescreened using an electrostatic energy criterion followed by DFT geometry optimizations. Na ions were extracted in the sequence from three Na ions at the Na 2 sites to one Na ion at the Na 1 site, which was consistent with previous findings in other NASICON structures …”

Section: Methodssupporting

confidence: 84%

“…The NASICON structure is able to accommodate different transition metal cations and is synthetically accessible with various Na contents, leading to a rich chemical space and tunable electrochemical performance . Among all the redox‐active metals, V and Mn have been favored because they can provide double redox at high voltage (V 3+/5+ and Mn 2+/4+ ).…”

Section: Discussionmentioning

confidence: 99%

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A High‐Energy NASICON‐Type Cathode Material for Na‐Ion Batteries

Wang

Seo

et al. 2020

Advanced Energy Materials

133

145

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Over the last decade, Na‐ion batteries have been extensively studied as low‐cost alternatives to Li‐ion batteries for large‐scale grid storage applications; however, the development of high‐energy positive electrodes remains a major challenge. Materials with a polyanionic framework, such as Na superionic conductor (NASICON)‐structured cathodes with formula NaxM2(PO4)3, have attracted considerable attention because of their stable 3D crystal structure and high operating potential. Herein, a novel NASICON‐type compound, Na4MnCr(PO4)3, is reported as a promising cathode material for Na‐ion batteries that deliver a high specific capacity of 130 mAh g−1 during discharge utilizing high‐voltage Mn2+/3+ (3.5 V), Mn3+/4+ (4.0 V), and Cr3+/4+ (4.35 V) transition metal redox. In addition, Na4MnCr(PO4)3 exhibits a high rate capability (97 mAh g−1 at 5 C) and excellent all‐temperature performance. In situ X‐ray diffraction and synchrotron X‐ray diffraction analyses reveal reversible structural evolution for both charge and discharge.

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Section: Methodssupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

A High‐Energy NASICON‐Type Cathode Material for Na‐Ion Batteries

Wang

Seo

et al. 2020

Advanced Energy Materials

133

145

View full text Add to dashboard Cite

show abstract

“…Isotropic models were shown to perfectly describe the size and strains effects, considering Lorentzian and Gaussian contributions, respectively [38]. Only the parameters U and Y were refined, whereas V and W were fixed to the values obtained for LaB 6 . The isotropic atomic displacement parameters (Biso(Å 2 )) were refined.…”

Section: Structural Characterizationmentioning

confidence: 99%

“…Then, numerous studies were performed on materials with NASICON structure showing reversible lithium or sodium intercalation [4][5][6][7][8][9][10][11][12][13][14][15]: for instance first electrochemical experiments were performed in our group on A 1 + x Ti 2 (PO 4 ) 3 (A = Li, Na) [4][5]. Since the work of Padhi et al in 1997 and the very promising electrochemical performances obtained for optimized LiFePO 4 [16][17][18], polyanion compounds are considered as possible candidates for storage positive electrode materials in rechargeable lithium-ion batteries [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

C-containing LiFePO4 materials — Part I: Mechano-chemical synthesis and structural characterization

et al. 2008

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“…Recently many attempts have been reported on mixed M/M phosphates A 2 MM (PO 4 ) 3 (M = Ti 4+ , Zr 4+ , Sn and M = Fe 3+ , Cr 3+ , In 3+ ) on the octahedral site [18][19][20][21][22].…”

mentioning

confidence: 99%