Rechargeable Silicon Redox Batteries

Abstract: Despite its high abundance and ease of production, the possibility of using silicon as an active multivalent rechargeable anode has never been explored, until now. As a proof of concept, a novel rechargeable silicon cell, its design and architecture are reported, enabling Si to be reversibly discharged at 1.1 V and charged at 1.5 V. It is proven that during the discharge process silicon is dissolved and upon charging, elemental silicon is deposited. Several discharge–charge cycles are achieved, utilizing heavy doped n‐type Si wafer anodes and hybrid‐based ionic liquid electrolytes, along with dissolved halides, functioning as conversion cathodes. Cell characterizations correlate the discharge and charge processes with the presence of dissolved fluoride and Si species in the electrolyte. The presence of appreciable fluoride species is crucial in both establishing surface activation and battery operation, and their depletion is directly linked to cell performance degradation. Quantum‐chemical calculations based on density functional theory in the framework of a continuum model for solvation in ionic liquids are performed to shed light on Si ion deposition mechanism.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
Rechargeable Silicon Redox Batteries ; day:28 ; month:06 ; year:2022 ; extent:15
Advanced energy materials ; (28.06.2022) (gesamt 15)

Urheber
Epshtein, Alon
Baskin, Igor
Suss, Matthew
Ein‐Eli, Yair

DOI
10.1002/aenm.202201626
URN
urn:nbn:de:101:1-2022062915030289008718
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
15.08.2025, 07:30 MESZ

Datenpartner

Dieses Objekt wird bereitgestellt von:
Deutsche Nationalbibliothek. Bei Fragen zum Objekt wenden Sie sich bitte an den Datenpartner.

Beteiligte

  • Epshtein, Alon
  • Baskin, Igor
  • Suss, Matthew
  • Ein‐Eli, Yair

Ähnliche Objekte (12)