Coupling of S@aerogel and Si/SiOx Nanospheres Electrodes with “Polysulfide” Salt-Free Electrolytes in a Fluorine-Free Lithium-Ion Batteries
Artikel i vetenskaplig tidskrift, 2025

Li-ion batteries play a pivotal role in powering electric vehicles and storing renewable energy. To enable their widespread adoption, it is imperative to explore new materials that reduce costs and enhance energy density. Sulfur and silicon exhibit promising characteristics as cathodes and anodes, respectively, and perform well in Li half-cells. However, their effective coupling in Li-ion configurations presents challenges. A major hurdle lies in identifying an electrolyte that ensures stable interphases and prolonged cycling while prioritizing safety and cost-effectiveness. This study introduces a groundbreaking approach by customizing a “salt-free” electrolyte solution compatible with both Li/sulfur and Li/silicon cells. The innovation involves dissolving lithium polysulfide in a diglyme solvent to facilitate Li-ion transfer. This improves cell safety due to the low flammability of the solvent and the absence of fluorine, while also ensuring faster Li-ion transport and prolonged stability of the solid electrolyte interphase. By integrating this tailored electrolyte with engineered electrodes, including a free-standing reduced graphene oxide aerogel with ≈74% sulfur and high areal capacity Si/SiOx nanospheres, a unique “salt-free” Li-ion battery configuration is demonstrated. The findings present a promising avenue for developing cost-effective, safe, high-performance lithium-ion batteries.

sulfur/silicon electrodes

fluorine-free lithium-ion batteries

“salt-free” electrolyte

solid electrolyte interphase stability

Författare

Marco Agostini

Chalmers, Fysik, Materialfysik

Sapienza Università di Roma

Jang Yeon Hwang

Hanyang University

Piotr Jankowski

Politechnika Warszawska

Hyeona Park

Hanyang University

Chaiwon Lee

Hanyang University

Hansu Kim

Hanyang University

Shizhao Xiong

Chalmers, Fysik, Materialfysik

Carmen Cavallo

Universitetet i Oslo

Arcangelo Celeste

Sapienza Università di Roma

Sang Gil Woo

Korea Electronics Technology Institute

Jinhua Sun

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Sergio Brutti

Sapienza Università di Roma

Yang Kook Sun

Hanyang University

Aleksandar Matic

Chalmers, Fysik, Materialfysik

Small Structures

26884062 (eISSN)

Vol. In Press

Ämneskategorier (SSIF 2025)

Materialkemi

Oorganisk kemi

Den kondenserade materiens fysik

DOI

10.1002/sstr.202500096

Mer information

Senast uppdaterat

2025-05-09