Abstract
Rigid-rod polymers tethered with delocalized anions and flexible ion conductive side chains present a synthetic pathway toward thin, single-ion conducting electrolyte membranes with low bulk resist...
Highlights
Solid polymer electrolytes (SPEs) have been extensively studied for a wide variety of applications, including solidstate batteries, electrochromic devices, solar cells, and different sensors and actuators.[1−7] In principle, SPEs consist of salts that are dissolved in and transported by a polymer host such as poly(ethylene oxide) (PEO).[8,9]
The ubiquitous PEO dissolves lithium salts by coordinating the lithium cations (Li+), and only a fraction (
A scattering maximum at low angles was observed at approximately 3.9, 4.0, and 2.8° (d = 2.3, 2.2, and 3.2 nm), respectively. These maxima likely corresponded to the distance between two stacks of PpP.[36−38,47] The distance increased when the ionic content was increased, which may result from the increased level of coordination between the EO4 side chains and Li+ ions
Summary
Solid polymer electrolytes (SPEs) have been extensively studied for a wide variety of applications, including solidstate batteries, electrochromic devices, solar cells, and different sensors and actuators.[1−7] In principle, SPEs consist of salts that are dissolved in and transported by a polymer host such as poly(ethylene oxide) (PEO).[8,9] Ideally, SPEs should combine high ionic conductivity with high mechanical strength to form thin-film electrolytes with low bulk resistance. One successful strategy to circumvent this issue is to molecularly design polymer structures that microphase separate to form a bicontinuous morphology containing one phase with a low Tg that facilitates high ionic conductivity and another phase strength.[14−18] with Tria high Tg or diblock that imparts copolymers mechanical have been extensively studied as microphase-separated polymer electrolyte systems,[13,18−21] and the most common examples are different kinds of block copolymers of polystyrene and PEO.[11,22−24] In some applications, such as lithium batteries, only the transport of the cation is desirable. The copolymers were subsequently characterized as SIC-SPEs with a focus on thermal properties, morphology, and ionic conductivity
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