Novel cation conductors based on rigid-rod poly(p-phenylene)s

Polymer Electrolytes for Lithium-Ion Batteries

“…9), the ionic conductivity increases dramatically and becomes comparable to that of the corresponding multi-ion conducting SPE with the same Li/O ratio. [43] Surprisingly, the addition of large quantities of plasticizer (72 wt.-%) does not lead to a liquid-like material, but films prepared from 21 are not even slightly sticky and exhibit surprisingly good mechanical properties. This appears to be the result of the reinforcing effect of the rigid PPP backbones, which again proves the concept of the molecular composite SPE material to be successful.…”

Preparation and characterization of composite electrolytes based on PEO(375)-grafted fumed silica

“…Polyethylene oxide (PEO) has been recognized for over two decades as the polymer that solvates lithium ions by complexation with the lone pair electrons on the ether oxygen, separating them from the counter ions. PEO is cheap, electrochemically stable and has good conductivity above its melt temperature (T m = 65°C),~10 − 3 S/cm at 80°C in P(EO) n LiX, (n = [10][11][12][13][14][15][16][17][18][19][20] with salts such as Li(CF 3 SO 2 ) 2 N or LiClO 4 , but has low (~10 − 7 S/cm) ambient temperature conductivity. Ion transport in these polyether-based electrolytes takes place in the amorphous domains, coupled to the segmental mobility of the chains, with lithium ions hopping between coordination sites.…”

“…Use of low molar mass polyethylene glycol dimethyl ethers (PEGDMEs) as plasticizers (30-40%) in the PEO matrix increased ambient temperature conductivities, but at the cost of significant reduction in the mechanical and interfacial properties [1]. Other approaches to increasing the room temperature (RT) conductivity of polyether electrolytes are by attachment of short-chain PEO oligomers as side chains to flexible [2][3][4][5][6][7][8][9][10] or rigid polymer backbones [11,12], network polyethers [13,14] and inorganic scaffolds [15,16].…”

Transport and Electro‐Optical Properties in Polymeric Self‐Assembled Systems

“…x = 4 and y = 2, the lamellar structure prevails up to 240 8C. In another version, the anionic counterions have been incorporated within the polymeric backbone [267]. Mesogenic groups are versatile for controlling self-assembly when various functionalities and anisotropic properties are pursued; for a recent review, see [22].…”