TECHNOLOGY FOCUS - POLYMERS - Preferred Monomer Units: The polymer additionally comprises monomer units which are selected from ethylene, propylene, tetrafluoroethylene (TFE), hexafluoropropylene (HFP), chlorotrifluoroethylene (CTFE), trifluoroethylene, vinylidene fluoride (VF2) and/or vinyl fluoride (preferably ethylene or vinylidene fluoride, especially vinylidene fluoride). The polymer is terpolymer which comprises combination of monomer units selected from VF2 and HFP, VF2 and CTFE, TFE and ethylene, VF2 and TFE, or VF2 and trifluoromethylene.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Solvent: (1) is acetonitrile, dimethylformamide (DMF), tetrahydrofuran (THF), dimethylsulfoxide (DMSO), and dimethylacetamide (DMAC). (2) is dimethylsulfoxide, ethylene carbonate, propylene carbonate, dimethoxyethane, and/or gamma butyrolactone, and mixtures with dimethylcarbonate (preferably mixture of ethylene carbonate and dimethyl carbonate). Preferred Definitions:    n = 1;    M = lithium;    X = F or -OLi;    p = 1.    EXAMPLE - A 240 ml of shaker tube was charged with 1,1,2-trichlorotrifluoroethane (100 ml), CF2 = CFCF2OCF2CF2SO2F and Perkadox (bis-(4-t-butylcyclohexyl peroxy)dicarboylate) (0.24 g). The reaction vessel was cooled in dry ice, degassed and replaced with nitrogen gas repeatedly. Vinylidene fluoride (VF2) (18 g) was added into the vessel and tube was heated at 50 degreesC for 10 hours and 80 degreesC for 2 hours. After completion of a polymerization the unreacted VF2 was removed and white solid was dissolved in acetone (400 ml). This acetone solution was slowly poured into 50% aqueous methanol (MeOH). The solid was filtered, washed with MeOH and dried at 80 degreesC to get a polymer (16.2 g). A mixture of the above obtained polymer (2.8), saturated lithium hydroxide (LiOH) (10 ml) in water (50 ml) and MeOH (50 ml) was stirred at room temperature for 2 days. After dilution with water (200 ml), the mixture was filtered and washed with water 5 times and dried at 70 degreesC in a partial vacuum oven to get ionic polymer (2.7 g).