the tetrazole and the ether oxygen atom s molecular electrostatic potential calculations as described below also indicate that the protonated state tetrazolium ions can provide sites for proton hopping accordingly very high proton conductivity may be achieved in doped or undoped state even at very low phosphoric acid uptake and the proton conductivity may be further improved when it is blended with a basic polymer also the polymer may be used for high temperature polymer electrolyte membrane fuel cells in an example embodiment the polymer the may be obtained from one or more of the following monomers for example the tetrazole containing polymer may be obtained by condensation polymerizing one or more of the monomers and then reacting a nitrile group with an azide in the above formulas x is cl f or oh and y is h methyl or so 3 h in an example embodiment the polymer may be one or more of the following compounds in the above formulas r is h alkyl c 1 c 12 alkyl linear or branched or benzyl and r1 is one or more selected from h methyl or so 3 h that is to say r1 may be h in a part of the polymer methyl in another part and so 3 h in still another part explaining more in detail the sum of the moles of phenyl wherein r1 is h the moles of phenyl wherein r1 is methyl and the moles of phenyl wherein r1 is so 3 h is equal to the total moles of phenyl substituted with r1 nitrile groups may be contained that is.