Application Of Electron-mediator In Biomass Fuel Cell And Performance Optimization Of Biomass Fuel Cell

As one of the most important sugars in nature,glucose can be obtained directly from a large amount of waste materials.It has many advantages,such as low price,non-toxic harmless,easy to use,green environmental protection.Because of these,glucose is considered as one of the most suitable fuel cells for fuel cells.However,most of the catalysts used in glucose fuel cells are expensive or complicated,and can not be put into mass production.Biomass fuel cell with cellulose as fuel is facing the problem of low solubility of cellulose.So it is urgent to find a way to improve the performance of the biomass fuel cell,to promote the further development of the fuel cell.In this paper,a double chamber alkaline fuel cell with an anion exchange membrane was constructed.2-hydroxy-1,4-naphthoquinone(NQ),methyl viologen(MV),neutral red(NR),methylene blue(MB),1,5-dichloroanthraquinone(DA)and anthraquinone(AQ)were were doped in activated carbon(AC),respectively,and pressed on nickel foam to fabricate the anodes.The air diffusion electrode was cathode and the electrolyte solution is 1 M glucose and 3 M KOH.The power density,polarization curves,EIS and Tafel curves of different anodes were tested.When the mass ratio of NQ to activated carbon was 2:1,the maximum power density of 16.10W/m~2 and the maximum current density of 47.74 A/m~2 could be obtained.At the same time,the persistence test of the fuel cell with NQ(2:1)anode was implemented.The maximum voltage could reach 0.63 V.The battery was running 426 hours after the completion of the basic discharge,and could discharge 1800.84C.Then we constructed a simple single chamber cellulose fuel cell,the foam nickel as anode,and the air diffusion electrode as cathode.The dissolution of cellulose solution in NaOH-water,NaOH/urea,NaOH/thiourea and NaOH/urea/thiourea were mainly discussed.It was found that the maximum current density could reach 8.51A/m~2 and the maximum power density reached 0.52 W/m~2 after the pretreatment with NaOH/urea/thiourea.In order to further explore the dissolution of cellulose,EIS?LSV?Tafel and CV curve were also conducted to further prove that urea and thiourea could promote the dissolution of cellulose.At the same time,we analyzed the oxidation products of cellulose fuel cells,and found that the cellulose was decomposed into short chain fatty acids.In addition,we applied the immobilized anode in the second chapter to the cellulose fuel cell,to explore its electrical properties.The morphology of the electrode was observed by FM-SEM,and the element composition of the electrode was analyzed by EDS.In this paper,the fuel cell is inexpensive and environmentally friendly.And the performance is better than other fuel cells reported in the past,in order to promote the further development of fuel cells.