Dual‐phase polymer electrolytes based on blending poly(MMA‐g‐NBR) and PMMA

Abstract

A new type dual-phase polymer electrolyte (DPE) based on poly(MMA-g-NBR) and poly(methyl methacrylate) (PMMA) was prepared by film-casting method. In the DPE, PMMA phase is selectively impregnated with the lithium salt solution, forming an ion-conducting network, while poly(MMA-g-NBR) phase maintains mechanical strength in the system. With grafting effect, the compatibility of two phases (PMMA/poly(MMA-g-NBR)) can be enhanced obviously. The chemical and physical characteristics, morphology and ionic conductivity behavior of DPEs, and their interfacial stability between lithium metal electrode were characterized by using of FTIR, 1 HMNR, DSC, SEM, optical microscopic images, AC impedance, and linear sweep voltammetry. A new type DPE with good mechanics and high electrochemistry properties is obtained at an optimum proportion of two blending polymers.

Preparation and characterization of blended solid polymer electrolyte 49% poly(methyl methacrylate)-grafted natural rubber:poly(methyl methacrylate)–lithium tetrafluoroborate

“…The sufficient mechanical strength was required to withstand the electrode stack pressure and stresses caused by dimensional changes that the rechargeable electrodes undergo during charge/discharge cycling [10]. The mechanical properties of polymer electrolyte can be improved by increasing the polymer/solvent ratio, which adversely affects the ionic conductivity of the polymer electrolyte system [15]. An alternative to plasticizers and ceramic fillers is to blend it with elastomeric polymer such as modified natural rubber [16].…”

Preparation and characterization of PMMA–MG49–LiClO4solid polymeric electrolyte

“…To overcome the drawback of GPE and the mechanical properties of PMMA film, PMMA was blended with an elastomer material such as modified natural rubber (NR) to improve the segmental motion in polymer hybrid systems and hence a more flexible and elastic material. NR and synthetic rubber like poly(styrene-co-butadiene) (SBR) and poly(acrylonitrile-co-butadiene) (NBR) rubber were not suitable because NR has sticky properties and is not compatible with PMMA [10]. Besides, NR does not have a polar group to enhance the ion mobility in the SPE system, whereas synthetic rubber gives poor mechanical properties at low polymer concentrations [11].…”

Novel amphiphilic polymer gel electrolytes based on (PEG‐b‐GMA)‐co‐MMA

“…The decrease in T g2 values of the PMMA component incorporated into conetwork compared with the T g value of neat PMMA can be interpreted as a result of enhanced compatibility of PEG-b-GMA segments with PMMA. 19 The trace of the polymer electrolyte showed that a crystallization process occurred after coordination of polymers with lithium salt. The value of v of the amphiphilic polymer electrolyte (Typically v P2000GM11 ¼ 14.95%, v P200GM11 ¼ 15.68%, v P200GM21 ¼ 18.15%) revealed the low degree of crystallinity, which suggests that only a small portion of the EO groups rearrange more regularly after coordinating with lithium salt in amorphous domains.…”