In operando Synchrotron XRD/XAS Investigation of Sodium Insertion into the Prussian Blue Analogue Cathode Material Na 1.32 Mn[Fe(CN) 6 ] 0.83 · z H 2 O

Sottmann, Jonas; Bernal, Fabian L. M.; Yusenko, K. V.; Herrmann, Matthias; Emerich, Hermann; Wragg, David S.; Margadonna, Serena

doi:10.1016/j.electacta.2016.03.131

Cited by 69 publications

(61 citation statements)

References 30 publications

(45 reference statements)

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“…The Mn 2+ /Mn 3+ redox couple reactions took place at a high state of charge in the hydrated system; the oxidation of both Mn and Fe gradually increased during the whole charging process. Similar works were reported by other researchers recently …”

Section: Xas Techniques For Prussian Blue Analogues For Sibssupporting

confidence: 92%

Understanding Challenges of Cathode Materials for Sodium‐Ion Batteries using Synchrotron‐Based X‐Ray Absorption Spectroscopy

Chen

Chou

Dou

2019

Batteries & Supercaps

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An in-depth understanding of the electrochemical behavior of cathode materials in a complex chemical environment is critical for the development of state-of-the-art sodium-ion batteries. Advanced synchrotron-based characterization is a powerful tool for collecting valuable information on complicated reaction mechanisms. X-ray absorption spectroscopy can be used to precisely monitor the valence state and corresponding changes during cycling of various elements. Information on the local structure, such as coordination number and bond information can also be extracted from the fitting data in Fourier transform extended X-ray absorption fine structure. In this review, we summarize findings on state-of-the-art cathode materials using ex-situ/in-situ X-ray absorption spectroscopy to probe fundamental discoveries on sodium-ion battery systems and what important and valuable results have been obtained. Further possible improvements and practical operating advice are also discussed in detail. . (a) Crystal structure of Na 3 V 2 (PO 4 ) 2 F 3 with space group Amam. (b) V K-edge XANES spectra at C/10. Reprinted with permission from (a) to (b). [51] Copyright 2017American Chemical Society. (c) Crystal structure of ɛ-VOPO 4 and corresponding charge/discharge curve. V K-edge in-situ XAS spectra of Mo 0.05 V 0.95 OPO 4 for (d) high-voltage discharge and (e) low-voltage discharge.

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Section: Xas Techniques For Prussian Blue Analogues For Sibssupporting

confidence: 92%

Understanding Challenges of Cathode Materials for Sodium‐Ion Batteries using Synchrotron‐Based X‐Ray Absorption Spectroscopy

Chen

Chou

Dou

2019

Batteries & Supercaps

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“…In addition to the initial cycles, the voltage plateaus without decline in subsequent charge–discharge process illustrated that the stable structure was formed after structural and surface evolvement . The polarization voltage of HCS‐PBMN electrode was maintained at 170 mV, which is lower than that of PBM electrode (Figure S7b, Supporting Information) and most of published reports . Actually, the removal of vacancies and interstitial water in the framework is conducive to the rapid transfer of Na + ions.…”

Section: Resultsmentioning

confidence: 75%

A Chemical Precipitation Method Preparing Hollow–Core–Shell Heterostructures Based on the Prussian Blue Analogs as Cathode for Sodium‐Ion Batteries

Huang

Xie

Wang

et al. 2018

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Prussian blue and its analogs are regarded as the promising cathodes for sodium-ion batteries (SIBs). Recently, various special structures are constructed to improve the electrochemical properties of these materials. In this study, a novel architecture of Prussian blue analogs with large cavity and multilayer shells is investigated as cathode material for SIBs. Because the hollow structure can relieve volume expansion and core-shell heterostructure can optimize interfacial properties, the complex structure materials exhibited a highly initial capacity of 123 mA h g and a long cycle life. After 600 cycles, the reversible capacity of the electrode still maintains at 102 mA h g without significant voltage decay, indicating a superior structure stability and sodium storage kinetics. Even at high current density of 3200 mA g , the electrode still delivers a considerable capacity above 52 mA h g . According to the electrochemical analysis and ex-situ measurements, it can be inferred that the enhanced apparent diffusion coefficient and improved insertion/extraction performance of electrode have been obtained by building this new morphology.

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“…It is well-known that the NH 3 -SCR reaction includes aredox cycle of Cu, making the immediate understanding of Cu ion migration as af unction of the oxidation state highly relevant and necessary. [8] To this end we employ time-resolved quasi-simultaneous PXRD and XANES in situ using synchrotron radiation, [9] exploiting the unique capability of the BM01B (now BM31) beamline at ESRF.I ns hort, aP XRD diffractogram is measured followed by the collection of four XANES spectra. This process takes about 5min and is cyclically repeated while applying external heat to the sample.…”

mentioning

confidence: 99%

Redox‐Driven Migration of Copper Ions in the Cu‐CHA Zeolite as Shown by the In Situ PXRD/XANES Technique

et al. 2017

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Using quasi-simultaneous in situ PXRD and XANES, the direct correlation between the oxidation state of Cu ions in the commercially relevant deNO NH -SCR zeolite catalyst Cu-CHA and the Cu ion migration in the zeolitic pores was revealed during catalytic activation experiments. A comparison with recent reports further reveals the high sensitivity of the redox-active centers concerning heating rates, temperature, and gas environment during catalytic activation. Previously, Cu was confirmed present only in the 6R. Results verify a novel 8R monovalent Cu site, an eventually large Cu presence upon heating to high temperatures in oxidative conditions, and demonstrate the unique potential in combining in situ PXRD and XANES techniques, with which both oxidation state and structural location of the redox-active centers in the zeolite framework could be tracked.

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In operando Synchrotron XRD/XAS Investigation of Sodium Insertion into the Prussian Blue Analogue Cathode Material Na 1.32 Mn[Fe(CN) 6 ] 0.83 · z H 2 O

Abstract: into the Prussian Blue Analogue Cathode Material Na1.32Mn[Fe(CN)6]0.83cdotz H2O, Electrochimica Acta http://dx.

Cited by 69 publications

References 30 publications

Understanding Challenges of Cathode Materials for Sodium‐Ion Batteries using Synchrotron‐Based X‐Ray Absorption Spectroscopy

Understanding Challenges of Cathode Materials for Sodium‐Ion Batteries using Synchrotron‐Based X‐Ray Absorption Spectroscopy

A Chemical Precipitation Method Preparing Hollow–Core–Shell Heterostructures Based on the Prussian Blue Analogs as Cathode for Sodium‐Ion Batteries

Redox‐Driven Migration of Copper Ions in the Cu‐CHA Zeolite as Shown by the In Situ PXRD/XANES Technique

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