2022
DOI: 10.1021/acsami.2c16420
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Exploring the Promise of Multifunctional “Zintl-Phase-Forming” Electrolytes for Si-Based Full Cells

Abstract: Li−M−Si ternary Zintl phases have gained attention recently due to their high structural stability, which can improve the cycling stability compared to a bulk Si electrode. Adding multivalent cation salts (such as Mg 2+ and Ca 2+ ) in the electrolyte was proven to be a simple way to form Li−M−Si ternary phases in situ in Si-based Li-ion cells. To explore the promise of Zintl-phaseforming electrolytes, we systematically investigated their application in pouch cells via electrochemical and multiscale postmortem … Show more

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Cited by 5 publications
(6 citation statements)
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“…The role of EC in the SEI formation and its function in electrolyte are critical since initial SEI acts as a protective and stabilizing layer for Si against further interfacial side reactions during subsequent electrochemical cycling . Such a finding is further supported by the ex situ XPS analysis investigating the post-mortem SEI chemical structure, revealing a notable decrease in carbonate species with Mg 2+ additives …”
Section: Resultsmentioning
confidence: 80%
See 3 more Smart Citations
“…The role of EC in the SEI formation and its function in electrolyte are critical since initial SEI acts as a protective and stabilizing layer for Si against further interfacial side reactions during subsequent electrochemical cycling . Such a finding is further supported by the ex situ XPS analysis investigating the post-mortem SEI chemical structure, revealing a notable decrease in carbonate species with Mg 2+ additives …”
Section: Resultsmentioning
confidence: 80%
“…38 Such a finding is further supported by the ex situ XPS analysis investigating the post-mortem SEI chemical structure, revealing a notable decrease in carbonate species with Mg 2+ additives. 31 To further explore possible mechanisms that led to the reduced EC solvent decomposition, the FTIR spectra of two electrolytes, the mixed cation of the Mg 2+ +Li + ion matrix, and the solely Li + electrolyte, were compared. The interaction of the EC with the Mg 2+ center was evident from the FTIR spectra (Figure 1d coordination of EC with the Mg ions.…”
Section: Prelithiation Sei On Si In An Ionmentioning
confidence: 99%
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“…Zintl phases typically contain electropositive cations (alkali, alkaline earth, or rare earth metals) and electronegative early p-block metals and semimetals from groups 13 to 15, which are the (poly)anions [1]. Given that many Zintl phases are intrinsic semiconductors, they could be the bases for materials with applications in solid-state energy conversion and/or storage [2][3][4][5][6][7][8][9][10], which further sustainability.…”
Section: Introductionmentioning
confidence: 99%