Novel gel polymer electrolyte based on matrix of PMMA modified with polyhedral oligomeric silsesquioxane

One novel cage kind of polyhedral ligomeric silsesquioxane (POSS), for modification application of gel polymer electrolyte (GPE) in lithium ion batteries (LIBs), was successfully synthesized via a facile two-step reaction under simple conditions. In four kinds of GPE with different filling amount of POSS, GPE-8 with 8 wt.% POSS content expresses the highest ionic conductivity up to the level of 10(-3) S cm(-1) at 30 A degrees C. The comprehensive investigation indicates that GPE-8 is thermally stable before 100 A degrees C, electrochemical stability window (ESW) is identified as 5.0 V, and the compatibility of electrolyte with lithium electrode and the charging-discharging cycling property of the assembled cell is satisfying.