Dilithium bis[(perfluoroalkyl)sulfonyl]diimide salts as electrolytes for rechargeable lithium batteries

Transport Properties of Solid Polymer Electrolytes Prepared from Oligomeric Fluorosulfonimide Lithium Salts Dissolved in High Molecular Weight Poly(ethylene oxide)

“…The polymeric host, poly(ethylene oxide) (PEO) with an average molecular weight of 4 × 10 6 Da, was supplied by Aldrich. The reference salt, LiTFSI, was provided by the 3M Corporation, and all the oligomeric fluorosulfonimide lithium salts, for which the structures are illustrated in Scheme , were synthesized and purified at Clemson using methods that have been described in detail elsewhere. − Prior to use, both PEO and lithium salts were vacuum-dried for 24−48 h at temperatures of 50−100 °C. − The lithium ribbon (19 mm wide, 0.75 mm thick) used for capping the stainless steel rod electrodes to prepare nonblocking electrodes was provided by Aldrich.…”

“…The present study considers SPEs prepared from high molecular weight poly(ethylene oxide) (PEO) and a series of lithium salts based on polyanions with structures similar to that of LiTFSI as illustrated in Scheme . The lithium salts were synthesized using methods that have been previously described by DesMarteau and co-workers. − The polyanion in each of the new salts consists of two terminal fluorosulfonimide units that are connected together by a polyanionic [(perfluorobutylene)disulfonyl]imide oligomeric chain of variable length. The work focuses mainly on transport properties including ionic conductivity, apparent lithium salt diffusion coefficient, and cationic transference number for SPEs at 90 °C and at a polymer-to-salt ratio of EO/Li = 30:1.…”

Metal- and covalent-organic frameworks as solid-state electrolytes for metal-ion batteries

“…Such electrolytes still possess an advantageously high density of anionic hopping sites and the safety features of solid electrolytes, but obtaining higher metal cation transference numbers will likely be a challenge due to the large percentage of mobile anions. An interesting extension upon this work could involve soaking the COF in a polylithium salt [63][64][65][66][67]. This could yield the COF with equal equivalents of the polyanion immobilized within the channels, triaminoguanidinium groups within the framework itself and mobile Li + .…”

New fluorine-containing plasticized low lattice energy lithium salt for plastic batteries

“…First, the lithium salt 3a was obtained by adding lithium methoxide to 3. The trimethylsilyl derivative 3b, formed from 3a and hexamethyldisilazane (HMDS) [11,12], was coupled with the previously prepared sulfonyl fluoride 2 to give the desired PLI, Eq. (3).…”