A new comparative investigation of lithium sulfur cells employing a tetraethylene glycol dimethyl ether-lithium trifluoromethanesulfonate (TEGDME-LiCF3SO3) electrolyte charged by various polysulfide species (Li2S2, Li2S4, Li2S6, and Li2S8) is here reported. We carefully detect the effects of lithium polysulfide addition by originally combining X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). The measurements clearly reveal how the polysulfide addition affects the nature and composition of the solid electrolyte interphase (SEI) in terms of precipitated S-based species determined by XPS. The study demonstrates that the SET layer formed on the Li anode decreases in impedance and stabilizes by the presence of polysulfide. This, together with a buffer effect strongly mitigating the sulfur-cathode dissolution and the shuttle reaction, significantly improves the stability of the lithium-sulfur cell. The data here reported clearly suggest the polytulfide as an effective additive to enhance the performance of the lithium-sulfur battery.
机构:
Univ Roma La Sapienza, Dept Chem, I-00185 Rome, ItalyUniv Roma La Sapienza, Dept Chem, I-00185 Rome, Italy
Agostini, Marco
;
Lee, Dong-Ju
论文数: 0引用数: 0
h-index: 0
机构:
Hanyang Univ, Dept Energy Engn, Seoul 133791, South KoreaUniv Roma La Sapienza, Dept Chem, I-00185 Rome, Italy
Lee, Dong-Ju
;
Scrosati, Bruno
论文数: 0引用数: 0
h-index: 0
机构:
Italian Inst Technol, Genoa, ItalyUniv Roma La Sapienza, Dept Chem, I-00185 Rome, Italy
Scrosati, Bruno
;
Sun, Yang Kook
论文数: 0引用数: 0
h-index: 0
机构:
Hanyang Univ, Dept Energy Engn, Seoul 133791, South Korea
King Abdulaziz Univ, Dept Chem, Jeddah 21589, Saudi ArabiaUniv Roma La Sapienza, Dept Chem, I-00185 Rome, Italy
Sun, Yang Kook
;
Hassoun, Jusef
论文数: 0引用数: 0
h-index: 0
机构:
Univ Roma La Sapienza, Dept Chem, I-00185 Rome, ItalyUniv Roma La Sapienza, Dept Chem, I-00185 Rome, Italy
机构:
Univ Roma La Sapienza, Dept Chem, I-00185 Rome, ItalyUniv Roma La Sapienza, Dept Chem, I-00185 Rome, Italy
Agostini, Marco
;
Lee, Dong-Ju
论文数: 0引用数: 0
h-index: 0
机构:
Hanyang Univ, Dept Energy Engn, Seoul 133791, South KoreaUniv Roma La Sapienza, Dept Chem, I-00185 Rome, Italy
Lee, Dong-Ju
;
Scrosati, Bruno
论文数: 0引用数: 0
h-index: 0
机构:
Italian Inst Technol, Genoa, ItalyUniv Roma La Sapienza, Dept Chem, I-00185 Rome, Italy
Scrosati, Bruno
;
Sun, Yang Kook
论文数: 0引用数: 0
h-index: 0
机构:
Hanyang Univ, Dept Energy Engn, Seoul 133791, South Korea
King Abdulaziz Univ, Dept Chem, Jeddah 21589, Saudi ArabiaUniv Roma La Sapienza, Dept Chem, I-00185 Rome, Italy
Sun, Yang Kook
;
Hassoun, Jusef
论文数: 0引用数: 0
h-index: 0
机构:
Univ Roma La Sapienza, Dept Chem, I-00185 Rome, ItalyUniv Roma La Sapienza, Dept Chem, I-00185 Rome, Italy