TECHNOLOGY FOCUS - POLYMERS - Preparation (claimed): The ionomer (I) is prepared using a transition metal alkene polymerization catalyst, and the monomer units (M1) and (M2) or the M2 units are connected by a C-C double bond or C-C single bond. The ring opening metathesis polymerization (ROMP) synthesis is carried out using a ruthenium-based metathesis catalyst. At least 50% of the C-C double bonds linking the repeat units of the ionomer are reduced to C-C single bonds. The ROMP polymerization carried out using a monomer comprising at least one tetraalkylammonium group having the formula (II). Preferred Compounds: The number average molecular weight (Mn) of the ionomer is 5000-1000000 g/mol and/or the weight average molecular weight (Mw) of the ionomer is 5000-2000000 g/mol. The end groups of the ionomer are selected from: (=CH2), (=CHR), (=CHPh), CH3, CH2R or -CH2Ph. The compound (I) is selected from 8 compounds as given in the specification, e.g. compounds of formula (IIIa) and (IIIb). At least one first M1 or M2 unit is connected by a polyatomic linking group (PAL) comprising 1-20C hydrocarbyl group. (Structure (IIIa), WO2010138958A2-001) (Structure (IIIb), WO2010138958A2-002)R=CH2W1;W1=H, alkyl, halide, hydroxide or acetate;Ph=phenyl;x=0.05-1.When the 1-20C hydrocarbyl group has a carbon in the beta position relative to the ammonium nitrogen atom then the beta carbon of the 1-20C hydrocarbyl does not have H substituent, to a second M1 or M2 unit, and the second M1 or M2 unit is in the same ionomer chain as the first M1 or M2 unit or the second M1 or M2 unit is a different ionomer chain than the first M1 or M2 unit. Preferred Device: The fuel cell comprises an alkaline anion exchange membrane comprising the ionomer (I) where the membrane has a thickness of 0.005-2 mm and a conductivity of at least 5 mS/cm. In the fuel cell, less than 50% of the alkyl tetraalkylammonium groups decompose after 7 days in an aqueous NaOH (1 M) at 25 degrees C. Preferred Definitions:    R1 and R2=cyclooct-1-en-5-ylmethyl (substituted by R8 at 5-position);    R7=-CH2-(1,4-phenylene)-CH2-;    A-=hydroxide.    EXAMPLE - To a solution of N,N,N-trimethyl-1-(2-methylbicyclo(2.2.1)hept-5-en-2-yl)methanaminium iodide (monomer-1) (0.053 g) and dicyclopentadiene (0.046 g) in chloroform (2 ml), a solution of Grubbs' second generation catalyst (0.0030 g) in chloroform (0.6 ml) was added and stirred for 1 minute at 20 degrees C. The orange reaction mixture was deposited on a petri dish preheated to 30 degrees C. The reaction mixture was solidified, the surface temperature increased to 75 degrees C for 1 hour to ensure all volatiles were removed to obtain an alkaline anion exchange membrane (AAEM) ionomer with 2:1 molar ratio of dicyclopentadiene:monomer-1. The sample was cooled, and deionized water was added to the petri dish in order to ease removal of the film. The AAEM was evaluated for ion exchange capacity (IEC) (involving conversion of the ionomer to hydroxide form by treatment with potassium hydroxide (1 M)), and average hydroxide conductivity. It was observed that the ionomer showed average IEC of 1 mmol OH-/g. The average hydroxide conductivity values at 20 degrees C and 50 degrees C were 14 plus minus 2 milli-Siemens (mS)/cm and 21 plus minus 4 mS/cm, respectively. The membrane showed average dimensional swelling of 1.7% in methanol and 0.55% in deionized water.