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Title: Direct glycerol fuel cell with polytetrafluoroethylene (PTFE) thin film separator

Here, anion-exchange membrane-based direct glycerol fuel cells (AEM-DGFCs) can yield high power density, however challenges exist in developing chemically stable AEMs. Here, we demonstrate a porous PTFE thin film, a well-known chemical, electro-chemical, and thermal robust material that can serve as a separator between anode and cathode, thus achieving high DGFC’s performance. A simple aqueous-phase reduction method was used to prepare carbon nanotube supported PdAg nanoparticles (PdAg/CNT) with an average particle size of 2.9 nm. A DGFC using a PTFE thin film without any further modification with PdAg/CNT anode catalyst exhibits a peak power density of 214.7 mW cm –2 at 80 °C, about 22.6% lower than a DGFC using a state-of-the-art AEM. We report a 5.8% decrease and 11.1% decrease in cell voltage for a PTFE thin film and AEM; similarly, the cell voltage degradation rate decreases from 1.2 to 0.8 mV h –1 for PTFE thin film, while for AEM, it decreases from 9.6 to 3.0 mV h –1 over an 80 h durability test period. Transmission electron microscopy results indicate that the average particle size of PdAg/CNT increases from 2.9 to 3.7 nm after 80 h discharge; this suggests that PdAg particle growth may be the mainmore » reason for the performance drop.« less
Authors:
 [1] ;  [1] ;  [2] ;  [1] ;  [3]
  1. Iowa State Univ., Ames, IA (United States)
  2. (China)
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States)
Publication Date:
Report Number(s):
IS-J-9253
Journal ID: ISSN 0960-1481; PII: S096014811631076X
Grant/Contract Number:
CBET-1512126; AC02-07CH11358
Type:
Accepted Manuscript
Journal Name:
Renewable Energy
Additional Journal Information:
Journal Volume: 105; Journal Issue: C; Journal ID: ISSN 0960-1481
Publisher:
Elsevier
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; 36 MATERIALS SCIENCE; direct glycerol fuel cell; polytetrafluoroethylene (PTFE); thin films; porous separator; anion exchange membrane; biomass renewables
OSTI Identifier:
1349647
Alternate Identifier(s):
OSTI ID: 1416635