Effect of the Electrolyte Amount and Type on the Lithium-Sulfur Battery Performance

YÜKSEL K., Firtin A., Karaseva E. V., Kuzmina E. V., Kolosnitsyn V. S., EROĞLU PALA D.

ChemElectroChem, cilt.13, sa.10, 2026 (SCI-Expanded, Scopus) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 13 Sayı: 10
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1002/celc.70225
  • Dergi Adı: ChemElectroChem
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC, MEDLINE, Directory of Open Access Journals
  • Anahtar Kelimeler: E/S ratio, electrochemistry, electrolyte design, lithium-sulfur battery, voltammetry
  • Boğaziçi Üniversitesi Adresli: Evet

Özet

Lithium-sulfur (Li-S) batteries are among the most promising next-generation battery technologies due to their high theoretical specific capacity. Li-S battery performance is intricately linked to materials and cell design, with electrolyte design playing a particularly crucial role owing to the complex mechanisms within the cell. Thus, the primary challenge in realizing high-performance Li-S batteries lies in achieving reasonable capacities and cycling performance at low electrolyte-to-sulfur (E/S) ratios, which might be attainable through unconventional electrolyte systems. This study aims to explore how varying the amount and composition of electrolytes affects the performance of Li-S batteries across different electrolyte systems. Sulfolane (SL)-Lithium bis(trifluoromethane)sulfonimide (LiTFSI) and triglyme (G3)-LiTFSI electrolytes demonstrate superior cycling performance across a range of E/S ratios. Notably, the SL-LiTFSI electrolyte system shows promise under lean electrolyte conditions, demonstrating superior performance at the lowest E/S ratio of 6 mL g−1, likely due to sulfolane's electrochemical stability, high dielectric constant, and donor number.