Ethanol Fuel Cell Catalyzed By AlPdNiCuMo Alloy And AlCoMn Oxide

With the continuous improvement of functional requirements and the increasing complexity of application scenarios,the requirements for advanced electronic devices to be flexible,wearable and safe in daily life have prompted the gradual development of flexible electronic devices that use ethanol as fuel.Ethanol fuel has the advantages of renewable,low toxicity,and non-polluting products,and is a very promising clean energy.However,ethanol oxidation produces a large number of intermediate products,which leads to slow kinetic reactions,fuel permeation leads to electrode deactivation,and precious metal catalysts increase system costs.These problems limit the wide application of ethanol fuel cells.In order to solve these problems,high-efficiency and low-cost catalysts have been developed to apply to battery cathodes and anodes,and solid-state batteries have been rationally designed to have excellent flexibility.In response to the need to reduce costs and improve battery performance,high-entropy alloy materials and spinel oxide materials are designed as anode and cathode catalysts for ethanol fuel cells.The materials are prepared by a simple dealloying method,and the element composition is controlled to change the catalytic performance of the materials.Using the multi-component effect to reduce the number of precious metals used,AlPdNiX alloys were prepared,where X includes one or two of Au,Cu and Mo.Changing the alloy composition does not have much effect on the formation of nanoporous high-entropy alloy phases,but is different The high-entropy alloys with different elemental composition have different catalytic activity,and AlPdNiCuMo shows the best ethanol oxidation performance.In addition,the preparation of nano high-entropy materials by dealloying method is extended to the field of high-entropy oxides.Spinel-type oxide materials have great application potential in terms of stability and electrocatalysis.Based on this,it is designed to use AlCoMn as the matrix and add Fe,Ni,V,and Mo to form a high-entropy oxide with a spinel structure.Among them,the oxygen reduction activity of（AlCoMn）₃O₄ is comparable to that of Pt/C,and it has excellent resistance to ethanol poisoning,while（FeCoNi）₃O₄/Mn₃O₄ has the dual functional catalytic activity of oxygen reduction and oxygen evolution.The AlPdNiCuMo high-entropy alloy and（AlCoMn）₃O₄ spinel oxide were used in ethanol fuel cells,and sodium polyacrylate hydrogel was used as the solid electrolyte to design a solid flexible ethanol fuel cell.The fuel cell has excellent performance,with a power density of up to 12.71 m W cm^-2 and an energy density of up to 13.63 m W h cm^-2;excellent flexibility,after 700 bendings,the voltage still maintains 80%of the initial value;high stability,only inject 3 m L of ethanol solution,the battery can continue to work for nearly 120 hours;it has the"inject and run",that is,when the ethanol fuel is injected,the battery can quickly generate current to make the device work,and the response speed is extremely fast.The nanoporous alloy is prepared by the dealloying method.The porous structure increases the specific surface area to increase the catalytic activity.Adjusting the alloy composition in a wide range can change the catalytic performance of the material.This method has a broad prospect in the field of preparing excellent catalysts.Using this method,the AlPdNiCuMo high-entropy alloy and（AlCoMn）₃O₄ spinel oxide electrocatalyst was designed to be used in the ethanol fuel cell,and higher battery performance was obtained.After a reasonable structure design,a device with excellent flexibility was obtained.Advanced electronic equipment is used in daily life.