Impact of opal nanoconfinement on electronic properties of sodium particles: NMR studies

Charnaya, E. V.; Lee, M.K.; Chang, Liang; Kumzerov, Yu. A.; Фокин, А. В.; Samoylovich, M. I.; Бугаев, А. С.

doi:10.1016/j.physleta.2014.12.028

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…Less is known about polymorphism of metals and metallic alloys embedded into nanopores. For gallium, which has several polymorphs in bulk, new crystalline modifications were observed and metastable crystalline phases were found to stabilize under nanoconfinement . Stabilization of metastable phases was also observed for frozen Ga–In eutectic alloys .…”

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confidence: 84%

“…For gallium, which has several polymorphs in bulk, new crystalline modifications were observed and metastable crystalline phases were found to stabilize under nanoconfinement. 8 Stabilization of metastable phases was also observed for frozen Ga−In eutectic alloys. 9 While many other metals along with gallium can occur in different polymorph phases, it is unknown what happens with this polymorphism in confinement.…”

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confidence: 93%

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Polymorphism of Metallic Sodium under Nanoconfinement

et al. 2016

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confidence: 84%

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confidence: 93%

Polymorphism of Metallic Sodium under Nanoconfinement

et al. 2016

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“…It has been shown that Knight-shifted 23 Na resonances can bifurcate if coexistening bulk and nanoconfined metallic environments are present. 25 The corresponding 27 Al resonances for the fully discharged EP B0D0 are observed in the upper right quadrant of Figure 8. The peak at −43 ppm is attributed to the hexa-alanate species (corresponding to Na 3 AlH 6 and LiNa 2 AlH 6 ) and the peak near +1640 ppm is the Knight shifted metallic Al resonance.…”

Section: Electrochemical Lithium Loading-figurementioning

confidence: 99%

Investigation of the Effects of Mechanochemical Treatment on NaAlH₄Based Anode Materials for Li-Ion Batteries

Cirrincione

Silvestri

Mallia

et al. 2016

J. Electrochem. Soc.

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Sodium alanate has proven to be a feasible candidate for electrochemical applications. Within a lithium cell, NaAlH 4 closely approaches its theoretical capacity of 1985 mAhg −1 upon the first discharge. Despite its high specific capacity, NaAlH 4 suffers from poor cycle efficiency, mostly due to the severe volume expansion following the conversion reaction and resulting in damage to electrode mechanical integrity with loss of electrical contact. Synthesis of an appropriate composite alanate/carbon by high energy ball milling demonstrates an ability to mitigate these deleterious effects, whereby large improvements in terms of electrochemical reversibility can be achieved. In order to highlight the effects of mechanochemical treatment on the electrochemical properties of NaAlH 4 , new insights on such NaAlH 4 /C composites are reported. Solid state NMR has been used to study the impact of ball milling on the NaAlH 4 crystal structure, while, the hydrogen content and associated desorption properties have been evaluated by thermal programmed desorption measurements. Also, electrochemical features have been analyzed via the combined application of potentiodynamic cycling with galvanostatic acceleration and electrochemical impedance spectroscopy measurements. Finally, new evidence concerning the reversibility of the conversion processes has been obtained by ex-situ NMR measurements on cycled electrodes.

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Review for Advanced NMR Characterization of Carbon‐Based and Metal Anodes in Sodium Batteries

Chen,

Dong,

Lai

et al. 2024

Adv Funct Materials

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Battery performance is highly related to the intrinsic properties of battery materials. To develop commercial anode electrode materials for advanced sodium‐based batteries, it is crucial to understand whose fundamental issues including compositions and structure of the bulk and interface, dynamics and electrochemical reactions during cycling. The key for present and ongoing success of carbon‐based and sodium metal anode is to overcome an intrinsic challenge associated with transport and storage of ions and complicated interface activities, especially for the sodiation process with associated risk of dendrite. Advanced Nuclear Magnetic Resonance (NMR) technique has unique advantages in characterizing the local or microstructure of anode electrode materials and their interfacial evolutions down to the atomic level by a noninvasive and nondestructive manner. In this review, an overview is provided of the recent advances in understanding the fundamental issues of carbon based and sodium metal anode materials using advanced NMR approaches. Here, latest advancements of NMR are presented for applications in characterizing structures and dynamics of anode electrode material as well as their interfacial evolutions. Finally, the prospect and limitation of NMR techniques in batteries research will be highlighted, thereby paving the way for accelerating the development of next generation sodium batteries.

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Impact of opal nanoconfinement on electronic properties of sodium particles: NMR studies

Cited by 6 publications

References 28 publications

Polymorphism of Metallic Sodium under Nanoconfinement

Polymorphism of Metallic Sodium under Nanoconfinement

Investigation of the Effects of Mechanochemical Treatment on NaAlH₄Based Anode Materials for Li-Ion Batteries

Review for Advanced NMR Characterization of Carbon‐Based and Metal Anodes in Sodium Batteries

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Impact of opal nanoconfinement on electronic properties of sodium particles: NMR studies

Cited by 6 publications

References 28 publications

Polymorphism of Metallic Sodium under Nanoconfinement

Polymorphism of Metallic Sodium under Nanoconfinement

Investigation of the Effects of Mechanochemical Treatment on NaAlH4Based Anode Materials for Li-Ion Batteries

Review for Advanced NMR Characterization of Carbon‐Based and Metal Anodes in Sodium Batteries

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Investigation of the Effects of Mechanochemical Treatment on NaAlH₄Based Anode Materials for Li-Ion Batteries