Towards an Efficient Direct Glucose Anion Exchange Membrane Fuel Cell System with Several Electro-Oxidation Units
| Autor: | Kari Saari, Jorma Selkäinaho, Martti Larmi, Yohannes Kiros, Jukka-Pekka Spets, Tanja Kallio, Petri Kanninen |
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| Přispěvatelé: | Department of Mechanical Engineering, Department of Chemistry and Materials Science, Department of Electrical Engineering and Automation, KTH Royal Institute of Technology, Aalto-yliopisto, Aalto University |
| Rok vydání: | 2017 |
| Předmět: |
ta213
Ion exchange Chemistry Inorganic chemistry Proton exchange membrane fuel cell Multistage fuel cell system 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Direct-ethanol fuel cell 01 natural sciences 0104 chemical sciences Anode Glucose Membrane Anion exchange membrane fuel cell Electrochemistry Anode electrocatalysts Near-neutral-state electrolyte Fuel cells 0210 nano-technology ta116 |
| Zdroj: | International Journal of Electrochemical Science. :3697-3708 |
| ISSN: | 1452-3981 |
| Popis: | This work covers the direct glucose anion exchange membrane fuel cell (AEMFC) with near-neutral-state electrolyte of 0.1 M [PO4] tot having two high-performing anode electrocatalysts (Pt and PtNi) at 37 oC and at a glucose concentration of 0.1 M. The cathode catalyst in each test was a Pt supported on carbon (60 wt.%). The PtNi/C had a total metal content of 40 wt.% and the Pt/C 60 wt.%. The operation of the AEMFC was controlled by means of an in-house made electronic load with PI-controller (i.e. a feedback controller, which has proportional and integral action on control error signal). There were two primary objectives with this study. At first, to find out how the electrode modifications of the anode (i.e. by increasing the thicknesses of these electrodes by adding extra carbon) affect the Coulombic efficiency (CE, based on the exchange of two electrons) and the specific energy (SPE, Wh kg-1) values of the direct glucose AEMFC. Secondly, investigate how a two-stage fuel cell system with two fuel cells concatenated and used one after the other for the electrochemical oxidation of glucose, influence the CE and SPE values. The results show that the modified PtNi anode shows superior results for the AEMFC compared to our earlier results. As for the two-stage fuel cell system, it increased the average electric power (mWh) and SPE when compared to single fuel cell systems except when the higher selective anode catalyst (Pt) was used in the first fuel cell prior to the fuel cell in the second fuel cell containing the lower selective anode catalyst (PtNi). |
| Databáze: | OpenAIRE |
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