Crystallization behavior and electrochemical properties of Na2FeyMn1−yP2O7 glass

Tanabe, Morito; Honma, Tsuyoshi; Komatsu, Takayuki

doi:10.1016/j.jnoncrysol.2017.12.039

Cited by 15 publications

(16 citation statements)

References 23 publications

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“…All XRD patterns were identified as triclinic β‐phase without any byproduct formation. Considering Tanabe's report, the substitution amount of FeO content should be less than 25% in Na 2 MnP 2 O 7 to precipitate the L‐phase. Thus, Na 2 Mn 0.9 Fe 0.1 P 2 O 7 was selected as one of the candidate composition for the first trial in the laser‐induced crystallization in this study.…”

Section: Resultsmentioning

confidence: 99%

“…The substitution of Fe 2+ ions in the Na 2 FeP 2 O 7 crystal by Mn 2+ ions is effective for increasing the discharge voltage of the battery. In our previous study, the crystallization of Na 2 MnP 2 O 7 exhibits two different structural polymorphs so‐called metastable layered‐ (designated here as L‐) Na 2 MnP 2 O 7 and β‐Na 2 MnP 2 O 7 depend on the heat‐treatment temperature of the base glass . On the other hand, the crystallization of Na 2 FeP 2 O 7 only shows the formation of β‐phase.…”

Section: Introductionmentioning

confidence: 97%

“…On the other hand, the crystallization of Na 2 FeP 2 O 7 only shows the formation of β‐phase. Tanabe clarified that the compositional limit of the formation of L‐ polymorph in the pseudo‐binary system of x Na 2 MnP 2 O 7 ‐(1− x )Na 2 FeP 2 O 7 exists at x = 0.75 . The Na 2 Mn x Fe 1− x P 2 O 7 (NMFP) glass is also an interesting material from the viewpoint of laser‐induced crystallization.…”

Section: Introductionmentioning

confidence: 99%

“…In our previous study, the crystallization of Na 2 MnP 2 O 7 exhibits two different structural polymorphs so-called metastable layered-(designated here as L-) Na 2 MnP 2 O 7 and β-Na 2 MnP 2 O 7 depend on the heat-treatment temperature of the base glass. [21][22][23] On the other hand, the crystallization of Na 2 FeP 2 O 7 only shows the formation of β-phase. Tanabe clarified that the compositional limit of the formation of L-polymorph in the pseudo-binary system of xNa 2 MnP 2 O 7 -(1−x)Na 2 FeP 2 O 7 exists at x = 0.75.…”

Section: Introductionmentioning

confidence: 99%

“…Tanabe clarified that the compositional limit of the formation of L-polymorph in the pseudo-binary system of xNa 2 MnP 2 O 7 -(1−x)Na 2 FeP 2 O 7 exists at x = 0.75. 22 The Na 2 Mn x Fe 1−x P 2 O 7 (NMFP) glass is also an interesting material from the viewpoint of laser-induced crystallization. The reason why we focus on the NMFP glass is that Mn 2+ ions do not absorb at operation wavelength of laser (~1064 nm) since the optical absorption can be controlled depending on the concentration of Fe 2+ .…”

Section: Introductionmentioning

confidence: 99%

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Phase selective crystallization of Na₂Mn_0.9Fe_0.1P₂O₇ glass by laser irradiation

Honma

Kumagai

Komatsu

2019

Int J of Appl Glass Sci

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Laser‐induced crystallization was performed to form zero‐dimensional (dot) and one‐dimensional (line) patterns on the surface of Na2Mn0.9Fe0.1P2O7 glass. X‐ray diffraction patterns of crystallized‐glass prepared by conventional heat treatment suggests that the formation of β‐Na2MnxFe1−xP2O7 phase is more likely to form than layered‐ (L‐) Na2MnxFe1−xP2O7, which is the other metastable polymorph. Using the continuous wave (CW) laser‐induced crystallization technique, a demonstration of phase selective crystal patterning was confirmed in Na2Mn0.9Fe0.1P2O7 glass. Depending on the laser power (P), micro‐Raman spectroscopy of dot pattern suggest that three types of structural modifications, that is, softening, crystallization of L‐phase structure polymorph, β‐phase, and a mixture of L‐ and β‐phase, were induced. Meanwhile, the line patterning of Na2Mn0.9Fe0.1P2O7 showed a slow growth rate of 2 µm s−1. At P = 0.73 W, even when scanning was started from the β‐dot, the growth of the β‐line was disturbed by the formation of L‐phase but stable line growth of β‐phase occur at P = 0.76 W. Although the formation rate was also slow, laser irradiation is possible to form metastable polymorph selectively.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Phase selective crystallization of Na₂Mn_0.9Fe_0.1P₂O₇ glass by laser irradiation

Honma

Kumagai

Komatsu

2019

Int J of Appl Glass Sci

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Manganese‐based polyanionic cathodes for sodium‐ion batteries

Niu

Zhao

2023

Carbon Neutralization

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Owing to abundant resources and low cost, sodium‐ion batteries (SIBs) are sweeping the world at a rapid pace. The cathode is the key to determining the energy density of the battery, and polyanionic compounds have become a representative class of cathode materials due to their stable three‐dimensional framework structure, high operating voltage, and good safety. Vanadium‐based and iron‐based polyanionic compounds are highly regarded in academic communities, but environmental hazards or low energy densities have once overshadowed them in the practical arena. In contrast, manganese (Mn)‐based polyanion is one of the potential candidates in terms of cost, voltage, and environmental friendliness, besides, many noteworthy advances have been recorded in recent years. This review summarizes the current research progress of Mn‐based polyanions and discusses the challenges they face while looking forward to the future development of such materials and ideas to solve the key problems. It is expected to have a positive effect, that is, to attract more practitioners to focus on the practical way out of such materials.

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Mixed Polyanion Na‐Mn‐V‐P Glass–Ceramic Cathode Network: Improved Electrochemical Performance and Stability

et al. 2020

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This investigation demonstrates the electrochemical performance of glass and glass–ceramic NaMn1−x(VO)xPO4 (x = 0.1, 0.3, 05, 0.7 mol%, and labeled as NM1−xVxP) cathode material system via phase details, structural illustration, electronic conductivity, and reversible capacity, etc. Pro‐crystal calculation analysis is used to monitor Na+ ion pathways’ migration for as‐precipitated NaMnPO4, Na2MnP2O7, and NaVO3 phases. The highest conductivity is achieved (≈5.92 × 10−7 S cm−1) for the glass–ceramic sample having x = 0.3 mol% (NM0.7V0.3P) due to the lowest charge transfer resistance (Rct). Electrochemical measurements of the best conducting sample using coin half‐cell exhibit two distinct voltage plateaus at 2 and 2.9 V versus Na/Na+, facilitating the active centers in two directions. The cyclability test of best‐conducting NM0.7V0.3P glass–ceramic network exhibits adequate reversible capacity up to 97% of the specific capacity even up to 50 cycles, which satisfies its superior stability for longer durations.

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Crystallization behavior and electrochemical properties of Na2FeyMn1−yP2O7 glass

Cited by 15 publications

References 23 publications

Phase selective crystallization of Na₂Mn_0.9Fe_0.1P₂O₇ glass by laser irradiation

Phase selective crystallization of Na₂Mn_0.9Fe_0.1P₂O₇ glass by laser irradiation

Manganese‐based polyanionic cathodes for sodium‐ion batteries

Mixed Polyanion Na‐Mn‐V‐P Glass–Ceramic Cathode Network: Improved Electrochemical Performance and Stability

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Crystallization behavior and electrochemical properties of Na2FeyMn1−yP2O7 glass

Cited by 15 publications

References 23 publications

Phase selective crystallization of Na2Mn0.9Fe0.1P2O7 glass by laser irradiation

Phase selective crystallization of Na2Mn0.9Fe0.1P2O7 glass by laser irradiation

Manganese‐based polyanionic cathodes for sodium‐ion batteries

Mixed Polyanion Na‐Mn‐V‐P Glass–Ceramic Cathode Network: Improved Electrochemical Performance and Stability

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Product

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About

Phase selective crystallization of Na₂Mn_0.9Fe_0.1P₂O₇ glass by laser irradiation

Phase selective crystallization of Na₂Mn_0.9Fe_0.1P₂O₇ glass by laser irradiation