X-ray photoelectron spectroscopy as a probe for understanding the potential-dependent impact of fluoroethylene carbonate on the solid electrolyte interface formation in Na/Cu2Sb batteries

Gimble, Nathan J.; Kraynak, Leslie A.; Schneider, Jacob; Schulze, Maxwell C.; Prieto, Amy L.

doi:10.1016/j.jpowsour.2020.229171

Cited by 9 publications

(10 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For Cl 2p spectra, the peaks at 198.9, 200.5, 209.1, and 210.6 eV attribute to NaCl (Cl 2p3/2, 2p1/2), NaClO 3 , and NaClO 4 , respectively. [ 33–35 ] Under different charge states, the spectral peaks of these products always exist, and the areas of peaks are roughly the same. These prove that the SEI film is stable during the charge/discharge process.…”

Section: Resultsmentioning

confidence: 99%

NiSb@PEO Hollow Nanospheres with Stabilized Structure for Improved Sodium Storage

Zhang

Jia

et al. 2021

Adv Materials Inter

View full text Add to dashboard Cite

Antimony has a high theoretical capacity, is widely used as an anode material for sodium‐ion batteries (SIB). However, the reversible sodiation/desodiation causes the structure collapse of the materials and then a rapid capacity fade. To solve this issue, the rationally designed NiSb@PEO (PEO, polyethylene oxide) hierarchical hollow nanospheres are successfully synthesized via the combination of hydrothermal and galvanic replacement methods. The unique hierarchical hollow nanospheres can alleviate volume expansion and mechanical stress, maintaining structural integrity during cycling. The PEO coating offers a highly conducive network and is conducive to forming stable solid electrolyte interface film on the surface of NiSb nanospheres. In addition, the nanospheres can shorten the transport pathway for the charged species. Benefiting from these structural advantages, NiSb@PEO hollow nanospheres as anodes for SIB display excellent sodium storage properties. At the current density of 100 mA g−1, the initial charge specific capacity of the NiSb@PEO anode is 446 mAh g−1, and the capacity retains 82.5% after 100 cycles. NiSb@PEO can maintain a reversible capacity of 284 mAh g−1 even at a high current density of 1600 mA g−1.

show abstract

Section: Resultsmentioning

confidence: 99%

NiSb@PEO Hollow Nanospheres with Stabilized Structure for Improved Sodium Storage

Zhang

Jia

et al. 2021

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

“…22 Notably in our previous work, we show that without FEC, there is a signicant quantity of SEI species on the surface of Cu 2 Sb at potentials where little charge had passed. 17 Subsequently, we hypothesized, and show herein, that the base carbonate electrolyte reacts with sodium metal spontaneously and the products of this reaction diffuse across the half-cell to deposit onto Cu 2 Sb as initial SEI species. Furthermore, we hypothesize and demonstrate that FEC works differently than previously thought in the literature: instead of reducing onto the anode during cycling, FEC prevents the previously mentioned initial spontaneous SEI formation through prepassivating sodium metal prior to any applied electrochemistry.…”

mentioning

confidence: 87%

“…8,15,16 Previously, we examined reductive electrochemical liquid electrolyte decomposition into the SEI as a function of applied potential on Cu 2 Sb in sodium metal half-cells using X-ray photoelectron spectroscopy (XPS). 17 Our results showed that fluoroethylene carbonate (FEC), a small molecule additive that has been widely studied because it improves cycle lifetime in both sodium and lithium batteries, has a significant impact on the SEI species observed at different voltages during the initial discharge of half-cells, where the SEI is thought to form. 17 The additive FEC is thought to improve cycle lifetime by acting sacrificially, decomposing onto the anode's surface, to build a SEI that benefits the cell.…”

mentioning

confidence: 89%

“…17 Our results showed that fluoroethylene carbonate (FEC), a small molecule additive that has been widely studied because it improves cycle lifetime in both sodium and lithium batteries, has a significant impact on the SEI species observed at different voltages during the initial discharge of half-cells, where the SEI is thought to form. 17 The additive FEC is thought to improve cycle lifetime by acting sacrificially, decomposing onto the anode's surface, to build a SEI that benefits the cell. 18–21 One hypothesis, proposed by Dugas et al , suggests that FEC may form a stable inner layer and an evolving outer layer on sodium metal with cycling, though no conclusion on the true nature of how FEC passivates and affects sodium metal has been reached.…”

mentioning

confidence: 89%

“…23 Following our previous work, electrodeposited Cu 2 Sb anode material was used so SEI species can be observed without interference from binders or additives. 17,[24][25][26][27] For the interested reader, more information on XPS tting and presentation can be found in our previous publications. 17,28 XPS data of all corresponding sodium counter electrodes is present and discussed in the ESI (Table S1, Fig.…”

Section: Sustainablementioning

confidence: 99%

See 2 more Smart Citations

Spontaneous solid electrolyte interface formation in uncycled sodium half-cell batteries: using X-ray photoelectron spectroscopy to explore the pre-passivation of sodium metal by fluoroethylene carbonate before potentials are applied

Gimble

Prieto

2022

Sustainable Energy Fuels

Self Cite

View full text Add to dashboard Cite

show abstract

Probing Sodium Storage Mechanism in Hollow Carbon Nanospheres Using Liquid Phase Transmission Electron Microscopy

Hou

Song

Odziomek

et al. 2023

Small

View full text Add to dashboard Cite

Carbonaceous materials are promising sodium‐ion battery anodes. Improving their performance requires a detailed understanding of the ion transport in these materials, some important aspects of which are still under debate. In this work, nitrogen‐doped porous hollow carbon spheres (N‐PHCSs) are employed as a model system for operando analysis of sodium storage behavior in a commercial liquid electrolyte at the nanoscale. By combining the ex situ characterization at different states of charge with operando transmission electron microscopy experiments, it is found that a solvated ionic layer forms on the surface of N‐PHCSs at the beginning of sodiation, followed by the irreversible shell expansion due to the solid‐electrolyte interphase (SEI) formation and subsequent storage of Na(0) within the porous carbon shell. This shows that binding between Na(0) and C creates a Schottky junction making Na deposition inside the spheres more energetically favorable at low current densities. During sodiation, the SEI fills the gap between N‐PHCSs, binding spheres together and facilitating the sodium ions' transport toward the current collector and subsequent plating underneath the electrode. The N‐PHCSs layer acts as a protective layer between the electrolyte and the current collector, suppressing the possible growth of dendrites at the anode.

show abstract

X-ray photoelectron spectroscopy as a probe for understanding the potential-dependent impact of fluoroethylene carbonate on the solid electrolyte interface formation in Na/Cu2Sb batteries

Cited by 9 publications

References 67 publications

NiSb@PEO Hollow Nanospheres with Stabilized Structure for Improved Sodium Storage

NiSb@PEO Hollow Nanospheres with Stabilized Structure for Improved Sodium Storage

Spontaneous solid electrolyte interface formation in uncycled sodium half-cell batteries: using X-ray photoelectron spectroscopy to explore the pre-passivation of sodium metal by fluoroethylene carbonate before potentials are applied

Probing Sodium Storage Mechanism in Hollow Carbon Nanospheres Using Liquid Phase Transmission Electron Microscopy

Contact Info

Product

Resources

About