Lithium-doped plastic crystal electrolytes exhibiting fast ion conduction for secondary batteries

Phase Behavior of the [N(C₂H₅)₄][BF₄]-[N(C₃H₇)₄][BF₄] Binary System

“…3,12,[15][16][17] During considerable efforts to increase the ionic conductivity of OIPCs, the method of doping of the salts of target ions into OIPCs has been adopted since it was reported to significantly increase the ionic conductivity up to several orders of magnitude. 5,7,9,[18][19][20][21][22][23] Among these materials, [N-ethyl-N-methylpyrrolidinium][N(SO 2 -CF 3 ) 2 ] was one of the OIPCs to exhibit high ionic conductivity, and doping with Li[N(SO 2 CF 3 ) 2 ] salt to this OIPC was found to result in enhancement in ionic conductivity by twenty times and was very attractive for lithium secondary battery application. 5,19,20 Addition of an inorganic salt to OIPCs has been mainly carried out to introduce mobile ions such as Li + to achieve good ion conduction, whereas mixing two OIPCs is also considered as a method to obtain high ionic conductivity, which typically focuses on the change of their structural and thermal properties.…”

“…5,7,9,[18][19][20][21][22][23] Among these materials, [N-ethyl-N-methylpyrrolidinium][N(SO 2 -CF 3 ) 2 ] was one of the OIPCs to exhibit high ionic conductivity, and doping with Li[N(SO 2 CF 3 ) 2 ] salt to this OIPC was found to result in enhancement in ionic conductivity by twenty times and was very attractive for lithium secondary battery application. 5,19,20 Addition of an inorganic salt to OIPCs has been mainly carried out to introduce mobile ions such as Li + to achieve good ion conduction, whereas mixing two OIPCs is also considered as a method to obtain high ionic conductivity, which typically focuses on the change of their structural and thermal properties. 24 Alkylammonium salts have been attracting attention in structural studies because they exhibit a variety of structural changes during thermal transitions and their highest temperature solid phase is often characterized as IPC phase.…”

“…[1][2][3][4][5][6][7][8][9][10][11] In particular, organic ionic plastic crystals (OIPCs) are attractive for the application as solid-state electrolytes because of the greater structural flexibility than simple inorganic salts. 8,12 Because of the similarity in chemical structures of ionic species used in IPC and ionic liquid materials, chemistry of OIPCs is often regarded as an extended field of ionic liquids.…”

Composite Electrolytes for Lithium Batteries: Ionic Liquids in APTES Cross-Linked Polymers

“…The RTILs used in this study consisted of N-butyl-N-methylpyrrolidinium trifluoromethanesulfonimide (P 14 , Scheme 1), and N-propyl-N-methylpyrrolidinium trifluoromethanesulfonimide (P 13 ). [13][14][15][16] These RTILs have been shown to be stable toward lithium metal when mixed with LiTFSi. 16 When 30 wt% of P 13 is added to PEO doped with LiTFSi, more than an order of magnitude increase in conductivity is reported.…”

Proton conducting plastic crystal electrolytes based on pivalic acid

“…Interest in plastic crystals has been revived in the last two decades after the recognition of their potential use as new class of solid electrolytes [9][10][11]. They are characterized by the existence of high degree of structural disorder originating from the rotation or disorientation, of individual molecules within an ordered crystalline lattice [12].…”