Polymer electrolyte for lithium batteries based on photochemically crosslinked poly(ethylene oxide) and ionic liquid

Capillary Electrophoresis as Analysis Technique for Battery Electrolytes: (i) Monitoring Stability of Anions in Ionic Liquids and (ii) Determination of Organophosphate-Based Decomposition Products in LiPF6-Based Lithium Ion Battery Electrolytes

“…In Figure 6, the electropherogram of the determined m/z ratios from the mixture of the LIB electrolyte, PS and DEP (9) is illustrated. Beside DEP (9), the decomposition products (2)(3)(4)(5)(6)(7) were the same as in the previous sample. Additionally, the m/z ratio of 126.9966 (10) was In Figure 6, the electropherogram of the determined m/z ratios from the mixture of the LIB electrolyte, PS and DEP (9) is illustrated.…”

“…Ionic liquids (ILs) are molten salts that are liquids below 100 • C. They are used in different application fields as separation aid for complex analytes, as sample preparation methods for chromatographic analysis, or as electrolyte components in lithium ion batteries (LIBs) [1][2][3][4][5][6]. For the use of IL-based electrolytes for LIBs, high thermal stability as well as flame retardant performance and negligible vapor pressure are considered beneficial [7].…”

Carbonate-linked poly(ethylene oxide) polymer electrolytes towards high performance solid state lithium batteries

“…A novel blended polymer electrolyte was then reported by Armand and Zhou et al composed of lithium salt of a polyanion, poly[(4-styrenesulfonyl)(trifluoromethyl(S-trifluoromethylsulfonylimino)sulfonyl)imide] (PSsTFSI À ), and poly (ethylene oxide), which became a promising solid polymer electrolyte for lithium batteries [35]. The UV cross-linked ternary PEO electrolyte, in presence of the plasticizing LiTFSI and an ionic liquid of N-alkyl-N-methylpyrrolidinium TFSI, delivered high ionic conductivity of nearly 10 À3 S cm À1 at room temperature as a result of the reduced crystallinity of the ternary electrolytes [36,37]. Other all solid state PEO polymer electrolytes were also prepared by a UV cross-linked process and a hot-pressing method manifesting improved performance [38,39].…”

Electrolytes for high-energy lithium batteries

“…Cross-linked polymer electrolyte films have been synthesized by a number of methods, including chemical cross-linking (Borghini et al 1996;Matoba et al 2002;Fogeling et al 2010), photochemically cross-linking (Rupp et al 2008), UV-cross-linking (Choi and Park 2009) and electron-beam cross-linking (Uchiyama et al 2009). Solid cross-linked electrolytes based on PEO, without added solvent, generally exhibit ionic conductivities around 10 -5 S/cm at room temperature as the cross-linking inhibits chain crystallization, though it slows chain mobility.…”

“…Still, the Bellcore electrolyte suffers from the other problems associated with aprotic liquid electrolytes: low thermal stability, low cathodic stability, volatility, flammability and insufficient moduli to prevent dendritic lithium growth. Ionic liquid-based gel polymer electrolytes are now widely studied as a possible solution to some of these issues (Rupp et al 2008;Fuller et al 1998;Nakagawa et al 2003;Cheng et al 2007;Liao et al 2010); PEO-based gel polymer electrolytes have also been explored, by swelling a high molecular weight PEO matrix with PEG oligomers (Borghini et al 1996). Ceramic-liquid electrolytes ''Soggy sand'' electrolytes are created by doping a liquid electrolyte with ceramic nanoparticles (Bhattacharyya et al 2004;Bhattacharyya 2009, 2010;Walls et al 2003).…”