Poly(ethylenglycol)dimethylether–lithium bis(trifluoromethanesulfonyl)imide, PEG500DME–LiTFSI, as high viscosity electrolyte for lithium ion batteries
| Autor: | Stefania Panero, Alessandro Latini, Bruno Scrosati, Jusef Hassoun, Rebecca Bernhard |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Lithium vanadium phosphate battery
Inorganic chemistry Socio-culturale Energy Engineering and Power Technology Electrolyte Electrochemistry Lithium-ion battery poly(ethyleneglycol)dimethylether lithium bis(trifluoromethanesulfonyl)imide peg500dmeelitfsi safe-electrolyte lithium ion battery chemistry.chemical_compound Economica peg500dme-litfsi poly(ethyleneglycol)dimethylether Thermal stability Electrical and Electronic Engineering Physical and Theoretical Chemistry Polarization (electrochemistry) Lithium cobalt oxide Renewable Energy Sustainability and the Environment Chemistry Ambientale safe-electrolyte Dielectric spectroscopy lithium bis(trifluoromethanesulfonyl) imide lithium bis(trifluoromethanesulfonyl)imide lithium ion battery |
| Zdroj: | Journal of Power Sources. 226:329-333 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2012.10.059 |
| Popis: | In this paper we report a poly(ethylenglycol)dimethylether–lithium bis(trifluoromethanesulfonyl) imide (PEG500DME–LiTFSI) as high viscosity, safe electrolyte for lithium ion batteries. The high molecular weight of the end-capped ether solvent is reflected as low vapor pressure and excellent thermal stability of the electrolyte, as demonstrated by thermogravimetry, this resulting in remarkable safety content. The electrochemical impedance spectroscopy study of the electrolyte demonstrates a Li-transference number of 0.48, a conductivity of the order of 10−3 S cm−1, and a high interphase stability with the lithium metal, the linear sweep voltammetry indicates an electrochemical stability window extending up to 4.8 V vs. Li/Li+. Furthermore, promising electrochemical performances in terms of reversibility, cycling stability and low charge–discharge polarization are observed using the electrolyte in lithium and in lithium ion batteries using lithium cobalt oxide (LCO) as cathode and titanium dioxide (TiO2) as anode. Hence, this electrolyte is a promising candidate for applications in safe, high performance lithium ion batteries. |
| Databáze: | OpenAIRE |
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