Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 14, Pages 7710-7718Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202013395
Keywords
anion exchange ionomers; anion exchange membranes; fuel cells; peak power density; poly(alkyl terphenyl piperidinium)
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Funding
- Technology Development Program to Solve Climate Change through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [NRF-2018M1A2A2061979]
- Technology Innovation Program - Ministry of Trade, Industry & Energy (MOTIE) of South Korea [20010955]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20010955] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The study introduces aliphatic chain-containing PDTP copolymers to enhance the performance of AEMFCs. By reducing phenyl content in AEIs and improving mechanical properties in AEMs, PDTP materials exhibit excellent performance indicators such as mechanical properties, fuel barrier properties, ion conductivity, and stability.
Aryl-ether-free anion-exchange ionomers (AEIs) and membranes (AEMs) have become an important benchmark to address the insufficient durability and power-density issues associated with AEM fuel cells (AEMFCs). Here, we present aliphatic chain-containing poly(diphenyl-terphenyl piperidinium) (PDTP) copolymers to reduce the phenyl content and adsorption of AEIs and to increase the mechanical properties of AEMs. Specifically, PDTP AEMs possess excellent mechanical properties (storage modulus>1800 MPa, tensile strength>70 MPa), H-2 fuel-barrier properties (<10 Barrer), good ion conductivity, and ex-situ stability. Meanwhile, PDTP AEIs with low phenyl content and high-water permeability display excellent peak power densities (PPDs). The present AEMFCs reach outstanding PPDs of 2.58 W cm(-2) (>7.6 A cm(-2) current density) and 1.38 W cm(-2) at 80 degrees C in H-2/O-2 and H-2/air, respectively, along with a specific power (PPD/catalyst loading) over 8 W mg(-1), which is the highest record for Pt-based AEMFCs so far.
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