Single Lithium‐Ion Conducting Polymer Electrolytes Based on a Super‐Delocalized Polyanion

Abstract

An ovel single lithium-ion (Li-ion) conducting polymer electrolyte is presented that is composed of the lithium salt of ap olyanion, poly[(4-styrenesulfonyl)(trifluoromethyl(S-trifluoromethylsulfonylimino)sulfonyl)imide] (PSsTFSI À ), and high-molecular-weight poly(ethylene oxide) (PEO). The neat LiPSsTFSI ionomer displays al ow glasstransition temperature (44.3 8 8C; that is,s trongly plasticizing effect). The complex of LiPSsTFSI/PEO exhibits ahigh Li-ion transference number (t Li + = 0.91) and is thermally stable up to 300 8 8C. Meanwhile,itexhibits aLi-ion conductivity as high as 1.35 10 À4 Scm À1 at 90 8 8C, which is comparable to that for the classic ambipolar LiTFSI/PEO SPEs at the same temperature. These outstanding properties of the LiPSsTFSI/PEO blended polymer electrolyte would make it promising as solid polymer electrolytes for Li batteries.

Sodium Bis(fluorosulfonyl)imide/Poly(ethylene oxide) Polymer Electrolytes for Sodium‐Ion Batteries

“…[8][9][10][11][12] Thus, there has been plenty of revealing research into LIBs. [13][14][15] Compared with LIBs, research of SPEs in SIBs is at av ery early stage, even though they startedi nt he same period, [16][17][18][19][20] and experimental SPE/SIB batteriesu sually consisto fN as alts and ap olymer matrix [mostly poly(ethylene oxide), PEO]. [21,22] The ionicc onductivities of the chosen Na salt and PEO-based SPEs are comparablew ith the analogous Li salts in LIBs, which are usually around 10 À7 -10 À8 Scm À1 at room temperature and reach approximately 10 À3 Scm À1 above 60 8C( meltingp oint of PEO).…”

“…DH m = 60.5 Jg À1 ), whichm ay be ascribed to the slow kinetic rate of the recrystallization of PEO, as described in the literature. [13,14] One important characteristic of polymer-based SIBs is safety, as the liquid electrolyte will catch fire when the temperature of the battery is high. ATGA test for the NaFSI/PEO (EO/Na + = 20) electrolyte was carried out, and the result( in Figure 2b)i ndicatest hat it is quite acceptable, with as table temperature range up to about 263 8C.…”

High-Performance 3-D Fiber Network Composite Electrolyte Enabled with Li-Ion Conducting Nanofibers and Amorphous PEO-Based Cross-Linked Polymer for Ambient All-Solid-State Lithium-Metal Batteries

“…Additionally, the degree of free Li + within the solid electrolyte directly influences the lithium transference number (t Li+ ). High t Li+ is favorable to facilitate the stabilization of solid electrolytes during cycling, which prevents the formation of the large electric field by immobilizing anions [52,53]. The t Li+ values of solid electrolytes were measured and calculated by the Bruce's equation.…”

Flexible Na batteries

“…88,89 Solid-state electrolytes can be divided into three types: solid polymer electrolytes, composite polymer electrolytes, and inorganic solid electrolytes. 88,89 Solid-state electrolytes can be divided into three types: solid polymer electrolytes, composite polymer electrolytes, and inorganic solid electrolytes.…”