PDF Publication Title:
Text from PDF Page: 009
Micromachines 2021, 12, 72 9 of 12 Micromachines 2021, 12, x As shown in Figure 10, when the Pt content is 30%, the prepared composite electrode exhibits the best performance. When the Pt content increases from 10% to 30%, the peak power density increases continuously, which indicates that Pt content has a positive impact on the performance of the fuel cell. When the Pt content is less than or equal to 30%, the dispersion of Pt in the carrier is not saturated, so there will be no agglomeration of Pt particles. However, when the Pt content increases to 40%, the dispersion of Pt in reduced graphene oxide will be saturated and excess Pt particles will easily agglomerate, resulting in low contact surface and lower cell performance. 3.4.4. Effect of Nafion Content on the Performance of μDMFC As a commonly used proton exchange membrane, Nafion has good proton conduc- 3.4.4. Effect of Nafion Content on the Performance of μDMFC tivity and chemical stability. The Nafion membrane demonstrates obvious methanol per- As a commonly used proton exchange membrane, Nafion has good proton conduc- meation. Adding an appropriate amount of Nafion to the electrode catalyst can increase tivity and chemical stability. The Nafion membrane demonstrates obvious methanol the active sites of Pt, improving the catalytic activity of the composite electrode for meth- permeation. Adding an appropriate amount of Nafion to the electrode catalyst can in- anol oxidation [18,19]. Nafion also has a hole-making ability, which facilitates the for- crease the active sites of Pt, improving the catalytic activity of the composite electrode for mation of microporous channels in the catalytic layer to make the methanol solution uni- methanol oxidation [18,19]. Nafion also has a hole-making ability, which facilitates the formly dispersed in the catalytic layer and reduce the influence of mass transfer polariza- formation of microporous channels in the catalytic layer to make the methanol solution tion. However, it is easy to form a Nafion-coated layer on the catalyst surface when the uniformly dispersed in the catalytic layer and reduce the influence of mass transfer po- Nafion content is too high, reducing its electronic conductivity and effective reaction con- larization. However, it is easy to form a Nafion-coated layer on the catalyst surface when tact area. Moreover, the over-dense structure of the catalyst layer will prevent the metha- the Nafion content is too high, reducing its electronic conductivity and effective reaction nol solution from infiltrating the whole catalyst layer, leading to a decrease in overall re- contact area. Moreover, the over-dense structure of the catalyst layer will prevent the activity [20,21]. methanol solution from infiltrating the whole catalyst layer, leading to a decrease in overall reactivity [20,21]. To investigate the effect of Nafion content on the performance of μDMFC, reduced To investigate the effect of Nafion content on the performance of μDMFC, reduced graphene oxide composite electrodes with Nafion content of 0%, 5%, 10% and 15% were graphene oxide composite electrodes with Nafion content of 0%, 5%, 10% and 15% were prepared and employed in the μDMFC for testing. Figure 11 illustrates the I-V and I-P prepared and employed in the μDMFC for testing. Figure 11 illustrates the I-V and I-P curves of μDMFC with different Nafion content levels in the catalyst layer. It can be seen curves of μDMFC with different Nafion content levels in the catalyst layer. It can be seen that the cell performance with Nafion content of 0%, 5% and 10% presents a gradient trend, that the cell performance with Nafion content of 0%, 5% and 10% presents a gradient which shows that the increasing of Nafion content in the range of 0% to 15% can effectively trend, which shows that the increasing of Nafion content in the range of 0% to 15% can enhance cell performance. However, when the content of Nafion is over 10%, the perfor- effectively enhance cell performance. However, when the content of Nafion is over 10%, mance begins to decline, indicating that Nafion gradually begins to form a coated layer the performance begins to decline, indicating that Nafion gradually begins to form a coated on the surface of the metal catalyst particles. As the Nafion content continues to increase, layer on the surface of the metal catalyst particles. As the Nafion content continues to the coated layer becomes thicker, which greatly increases the internal resistance and ef- increase, the coated layer becomes thicker, which greatly increases the internal resistance fective reaction area of the catalyst layer. and effective reaction area of the catalyst layer. 10 of 13 Fiigurre11..EfffecttoffdiiffferreenttNaafifioonnccoonntteennttlelevveelslsoonnththeeppeerrfoforrmaanncceeooffμμDDMFFCC. . 3.5. Effect of Micro-Porous Layer Composition on Performance of μDMFC 3.5.1. Effect of Different Carbon Loading Amounts on the Performance of μDMFC Carbon loading refers to the amount of carbon in the diffusion layer of the composite electrode. It has a significant influence on the internal structure compactness of the pre- pared micro-porous layer and also has a great influence on the diffusion of methanol. An appropriate carbon loading amount can not only diffuse methanol evenly throughout thePDF Image | Micro Direct Methanol Fuel Cell Reduced Graphene Oxide
PDF Search Title:
Micro Direct Methanol Fuel Cell Reduced Graphene OxideOriginal File Name Searched:
micromachines-12-00072-v2.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)