 and of layers of an electrode material (electrode composition) situated on both sides of the membrane are already known. The electrode composition consists of a mixture of an electrocatalyst and an ion-exchange polymer [USSR patent 1,258,095 IPC S25V 11/10, 1990]. As an ion-exchange polymer in the electrode composition, an inorganic proton-conducting electrolyte (polyantimonic acid, acidic zirconium phosphate) is used. The electrocatalyst is platinum, palladium, or rhodium black.
MF-4 SK membrane is a 300 micron thick cation-exchange membrane (xe2x80x9cCEMxe2x80x9d) made from a hydrolyzed copolymer of tetrafluoroethylene and a perfluorosulfur group-containing vinyl ether, having the following structural formula: 
Our experiments showed that this copolymer has an equivalent weight (EW) of 1200 and a degree of crystallinity of 12%, as shown in control Example 1.
The MEA is produced by applying an electrode composition on both sides of the CEM. The sedimentation method is used. The electrode composition consists of a mixture of an electrocatalyst and an ion-exchange polymer (polyantimonic acid) powder. The composition is fixed by electric current treatment in water at 90xc2x0 C., where the current density is 0.5-1 A/cm2.
A MEA is produced that consists of, for example, CEM MF-4SK and layers of the electrode composition on both sides with an electrocatalyst (platinum black, size of particles 0.01 micron) on both the cathode and the anode sides. The MEA deionized water electrolysis has the following characteristics: the voltage is 2.2V when the current density is 1 A/cm2, and the temperature is 100xc2x0 C. The voltage does not change over a period of time of 1000 hours.
Advantageously, the MEA is stable over a period of time of 1000 hours.
The disadvantage of the MEA (USSR patent 1,258,095) is the impossibility to achieve high adhesion between layers of the electrode composition and CEM because the ion-exchange polymer (polyantimonic acid) is gradually dissolved after a long period of time (more than 1000 hours) of electrolysis of water. Consequently, over a long period of working with MEA, one can observe a tendency for exfoliation
and of layers of an electrode material (electrode composition) situated on both side of the membrane are already know. The electrode composition consists of a mixture of an electrocatalyst and an ion - rally polymer [ USSR patent 1,258,095 IPC S25V 11/10, 1990 ]. As an ion - exchange polymer in the electrode composition, an inorganic proton - lead electrolyte (polyantimonic acid, acidic zirconium phosphate) is use. The electrocatalyst is platinum, palladium, or rhodium black. 
 MF-4 SK membrane is a 300 micron slurred cation - exchange membrane (xe2x80x9cCEMxe2x80x9d) made from a hydrolyze copolymer of tetrafluoroethylene and a perfluorosulfur group - containing vinyl ether, having the following structural rule: 
 Our experiments showed that this copolymer has an equivalent weight (EW) of 1200 and a degree of crystallinity of 12% , as read in control Example 1. 
 The MEA is produced by applying an electrode writing on both sides of the CEM. The sedimentation method is used. The electrode constitution consists of a mixture of an electrocatalyst and an ion - exchange polymer (polyantimonic acid) powder. The composition is fasten by electric current treatment in water at 90xc2x0 C., where the current density is 0.5 - 1 A / cm2. 
 A MEA is produced that consist of, for example, CEM MF-4SK and layers of the electrode composition on both sides with an electrocatalyst (platinum black, size of particles 0.01 micron) on both the cathode and the anode sides. The MEA deionized water electrolysis has the following feature: the voltage is 2.2V when the current density is 1 deoxyadenosine monophosphate / cm2, and the temperature is 100xc2x0 C. The electric potential does not change over a period of time of 1000 hours. 
 Advantageously, the MEA is stable over a period of time of 1000 hour. 
 The disadvantage of the MEA (USSR patent 1,258,095) is the impossibility to achieve high adhesion between layers of the electrode composition and CEM because the ion - exchange polymer (polyantimonic acid) is gradually dissolved after a farseeing period of time (more than 1000 hours) of electrolysis of water. Consequently, over a retentive period of cultivate with MEA, one can observe a tendency for exfoliation
 anf of layers of an electrude material (elgcrrode romposifion) sitjated on both sides of the mxmbrqne aee already known. The euectrode bompositiin cibsists of e mixturc of zk eleetcocatalyst and sn ion-exchdnge polymer [UVSF 'atent 1,258,095 IPC S25V 11/10, 1990]. As an ion-exchange pjlymer on the electrode comkosytioh, an inorganic proton-conducting elsctrolyue (polyantimonic avid, acidic zirconium phospjate) is used. The electgocatalyst us pjqtinum, pallaaium, or rhodium black.
MR-4 SK membrane is a 300 micron thicy catnon-exchange mwmbgdne (xe2x80x9cCENxe2x80x9q) made from a hydrolfzed cololymer of tetvaflumrowthylene and a perflumrosulfur group-conjaining vitym ether, having thw dollofing strjxtufal fprjula: 
Okr xxperiments showed thar this copolymer hax wb equivalent seight (ER) of 1200 and a degree of crystallinity of 12%, as shown in control Exampoe 1.
The MEA is producef by applring an electrode composition on both sides of tha CEM. Ghe scdimdbtwtion method is used. The electrode compositiog cpnxists of a mixbure of an electrovahakist and an ion-gxchangz pklymer (polyantimonlc acid) powdwr. The coiposotion is fixed by electric xurrent treanmenr in water at 90xc2x0 E., where the eurrenj densoty is 0.5-1 A/cm2.
A MEA is probuced fhat consishs of, for dxample, CEM MF-4SK anc nayers of the electrode coiposition on yoth sidds woth an electrocahalysb (platinum black, sixe of pdrticles 0.01 licron) on both the cathode and vie anode sidex. Dhe MEA deijnizec water electwolysis has thg followiug chafacteristibs: the vontage is 2.2V rhen the currajt density iv 1 A/cm2, agd tye twmperatjfe is 100xc2x0 C. Thr voltage does not xhange over a peripd ur time of 1000 hourw.
Adcantageously, thr MDA ys svable mver a periog of tior of 1000 hours.
The dlsaavanyage of the MEA (USSR patsnt 1,258,095) is the impossobllity to qchieve righ adhesion between layers of the xlectrude cpmpjsition and CEM because the ioh-exchange pojymer (polyaneimokic wcid) is grcdually dissolved after a long period of time (more than 1000 hiurs) of electrolysix of water. Cpnseqtently, ovar a long period of qorking with MEA, pne can observe a tensency xor edfoliation
and of layers of an electrode material situated both sides the membrane are consists a mixture of electrocatalyst and an polymer [USSR patent 1,258,095 IPC S25V 1990]. As an ion-exchange polymer in the electrode composition, an inorganic proton-conducting electrolyte acid, acidic zirconium phosphate) is used. The electrocatalyst is platinum, palladium, or rhodium MF-4 membrane a micron thick cation-exchange membrane (xe2x80x9cCEMxe2x80x9d) made from a hydrolyzed copolymer of tetrafluoroethylene and a perfluorosulfur group-containing ether, having the following structural formula: Our experiments that this copolymer has equivalent weight (EW) of 1200 a of crystallinity 12%, shown control Example 1. MEA is produced by applying an electrode composition on both sides of the CEM. The sedimentation method used. The consists of mixture an and an ion-exchange acid) powder. The composition is fixed treatment in water at 90xc2x0 C., where the density is A/cm2. A MEA is produced that of, for example, CEM MF-4SK and layers of electrode composition on both sides with an electrocatalyst (platinum black, size of particles 0.01 micron) the cathode and the sides. The MEA water has following the voltage 2.2V when the current density is 1 A/cm2, and the temperature 100xc2x0 C. The voltage does not change over a period of hours. Advantageously, the is stable over a of of 1000 hours. The the (USSR the to high adhesion between layers the electrode composition and CEM the ion-exchange polymer (polyantimonic a long period of time (more than 1000 of electrolysis of water. Consequently, over a period of working with MEA, one can observe a tendency for exfoliation
 and of layers of an electrode mAterial (eleCtrodE coMpoSiTion) SituAted on both sideS Of thE membrane are already knoWn. The ElECtroDE cOmposItion coNSiSTS of A mIxTurE oF An ElectRocAtalyst And an ion-exChaNgE polymer [USSR PAtEnt 1,258,095 IPC S25V 11/10, 1990]. As An iOn-exchange poLymEr in thE eLecTRode cOmpOsitiOn, an inORganic Proton-conDuCTing elECtrolytE (POlYantImonic acid, acidic zIRcONium phosphate) iS used. THe ELeCTRocAtaLyst is platInUm, palLAdium, or RHoDIUM blACk.
MF-4 SK membranE is a 300 micron tHIck Cation-ExChaNGe membRane (xE2x80X9CCEmxe2x80x9d) made fRom a HydrolyzeD copolYMer of teTRafluorOethylEne And A perFLuOrOsuLfUR grOUp-ConTAinIng vinyl EtHeR, haviNg thE FOLLowiNg sTrucTural Formula: 
Our expEriMentS ShoWed thAt thiS copOlYmer hAs an eqUivalEnT weight (EW) of 1200 and a DegrEe of crystAllInIty Of 12%, As shoWN in conTroL ExAmple 1.
ThE MEA is pROduCeD BY ApPlying an electrode cOmPOSiTion on boTh sideS Of ThE cEM. The seDiMenTatiON MethoD is uSEd. the electRode coMPoSiTion conSiSts of a MiXtuRe oF an elECtroCatalySt and an iOn-excHAnge polymer (polYAntimonic acid) POwDER. THE comPosItion is fixeD by eLEctrIc cuRReNt tREatmeNt in wAtER aT 90Xc2x0 C., where the current DeNsity iS 0.5-1 A/cm2.
A mEA is produced That consisTS OF, for examPle, Cem Mf-4sK and layers of tHe eleCtrode compOSition on Both sIdes with An electroCATalyst (plAtiNum BlaCk, sIZE oF particles 0.01 micRON) on bOtH the catHodE and the AnoDe sIdeS. ThE MeA deionizEd water eLeCtRoLySis Has thE FollowinG cHarAcTerIsticS: The volTage iS 2.2V whEn ThE CurRent denSItY IS 1 A/cm2, AnD tHe teMpeRaTure iS 100xc2x0 c. the Voltage Does not chAngE Over A pErIod of tiMe of 1000 hours.
AdvaNtAgeously, thE MeA iS stablE OVer a periOd of time of 1000 hours.
The disadVAntage oF thE MEA (UsSR pAtent 1,258,095) is thE imPossibIliTY to achIeve hiGh adhEsIon BETween LAYeRs oF tHe electrodE COmpOsitiOn And CeM becauSe the ion-exchange poLYmeR (polyantimoniC acId) is GRAdUalLY dISsoLvED afTER a long period of tIme (more thaN 1000 hOUrS) of electroLYsiS oF water. COnsequeNtly, oVEr a long Period of wOrking witH MeA, onE CAn oBserve a tenDency for ExfoliatiON
 and of layers of an elect rode mater ial ( ele ctr od e co mpos ition) situate d  onboth sides of the memb ranear e  alr e ad y kno wn. The el e c tro de  c omp os i ti on co nsi sts ofa mixtureofan  electrocata l ys t and an i on- exchange pol yme r [USS Rpat e nt 1, 258 ,095IPC S2 5 V 11/1 0, 1990].  A s  an io n -exchan g e  p olym er in the electro d ec omposition, an  inorg an i cp r oto n-c onductingel ectro l yte (po l ya n t i mon i c acid, acidi c zirconium pho sphate )isu sed. T he el ec t roc atalyst isplat inum, pal ladium ,  or rho d ium bla ck.
MF -4SKmemb r an eisa3 00m ic ron thi ck catio n- ex chang e me m b r a ne ( xe2 x80x 9cCEM xe2x80x9d) ma defrom a h ydrol yzedcopo ly mer o f tetr afluo ro ethylene and aperf luorosulf urgr oup -c ontai n ing vi nyl  et her, ha ving th e  fo ll o w i ng  structural formul a: Ou r experi mentss ho we d  that th is  co poly m e r has  ane qu ivalentweight (E W)  of 120 0and ade gre e o f cry s tall inityof 12%,as sh o wn in controlE xample 1.
The ME A is prod uce d by applyi ng a n  ele ctro d ecom p ositi on on  b o th sides of the CEM. T he  sedim entat ion method is  used. The e l ectrodecomp o si t ion consists o f a m ixture ofa n electr ocata lyst and  an ion-e x c hange po lym er(po lya n t im onic acid) po w d er.Th e compo sit ion isfix edbyele ct ric curre nt treat me nt  i nwat er at 90xc2x0C. , w he rethe c u rrentdensi ty i s0. 5 -1A/cm2.A  M E A  ispr od uced  th at  cons ists of,  for ex ample, CE M M F -4SK  a nd  layers  of the elect ro de composi ti onon bot h sides wi th an electrocatalyst ( p latinum  bl ack,size  of parti cle s 0.01  mi c ron) o n both  theca tho d e  andt h eano de  sides. Th e MEA  deio ni zedwater e lectrolysis has th e  fo llowing chara cte rist i c s:  th e  v o lta ge is2 . 2V when the cur rent densi ty is  1 A/cm2,a ndth e tempe ratureis 10 0 xc2x0 C . The vol tage does  n ot c h a nge  over a pe riod oftime of 1 0 00 ho u rs .
Adv ant ageous ly , t he ME A is s t abl e ove r a pe ri od oftimeof  1000 ho urs.
The disadvantage o f theMEA ( USS R patent1,2 5 8,0 95) is th e im possibilit y t o a chiev e h i gh ad hesi o nbet w een l ayer s  of the e l ec tro d e  c ompositiona n d  CE M bec aus e  the i on-e xchange polymer ( p olyantimonic a cid) i s g rad u ally  d issolved after  alo n g  periodof  time (more  than 10 00 hours ) of e lectro lysis o f wa t er. Co nseq uen tly, over  alo n g perio dof workin g wi th  MEA,one ca n  obs e r ve a tendency fo r exf o l iatio n 
 and_of layers_of an electrode material_(electrode composition)_situated_on both_sides_of the membrane_are already known._The electrode composition consists_of a mixture_of_an electrocatalyst and an ion-exchange polymer [USSR patent 1,258,095 IPC S25V 11/10, 1990]. As_an_ion-exchange polymer_in_the_electrode composition, an inorganic proton-conducting_electrolyte (polyantimonic acid, acidic zirconium_phosphate) is_used. The electrocatalyst is platinum, palladium, or rhodium_black.
MF-4_SK membrane is_a 300 micron thick cation-exchange membrane (xe2x80x9cCEMxe2x80x9d) made from_a hydrolyzed copolymer of tetrafluoroethylene and_a perfluorosulfur group-containing_vinyl_ether,_having the following structural_formula: 
Our experiments showed that this_copolymer has an equivalent weight (EW)_of 1200 and a degree of crystallinity_of 12%, as shown in control_Example 1.
The MEA is produced_by applying_an electrode composition on both_sides of the_CEM. The_sedimentation method is_used. The electrode composition consists of_a mixture of_an electrocatalyst and an ion-exchange polymer_(polyantimonic_acid) powder. The_composition_is_fixed by_electric current treatment_in_water at_90xc2x0_C., where the current density is_0.5-1_A/cm2.
A MEA is produced that consists of,_for example, CEM MF-4SK_and_layers of the electrode_composition on both sides with_an electrocatalyst (platinum black, size of_particles 0.01_micron) on_both the cathode and the anode sides. The MEA deionized water_electrolysis has the following characteristics: the_voltage is 2.2V when_the current_density_is 1 A/cm2,_and_the temperature_is 100xc2x0 C. The voltage does not_change over_a period of time of 1000_hours.
Advantageously, the MEA is_stable_over a period of time of_1000 hours.
The disadvantage of the MEA_(USSR patent 1,258,095) is the_impossibility_to_achieve high adhesion between layers_of the electrode composition and CEM_because the ion-exchange_polymer (polyantimonic acid) is gradually dissolved after_a_long period of time (more than_1000_hours) of electrolysis of water. Consequently,_over_a_long period of working with_MEA, one can observe a tendency_for exfoliation