Study on the Gel Polymer Electrolyte Based on the Synthesized Copolymer of P(MMA-MAh)

摘要

Gel polymer electrolytes (GPEs) are reported to be suitable for electrochemical devices since their transport properties are quite exceptional and they have an ionic conductivity of the order of 10~(-3) S/cm, an electrochemical stability window exceeding 4.5V and lithium-ion transference numbers averaging 0.9. In GPEs, the addition of plasticizer to the polymer electrolyte softens the polymer backbone, which results in high segmental motion and thus increases the ionic conductivity, but there is some loss of dimensional mechanical stability of the electrolyte. It is well recognized that the addition of inorganic fillers such as ceramic powder, alumina or silica to GPEs based on the polyether matrix will not only enhance its ionic conductivity, but also overcome the drawback of reduced dimensional mechanical stability.