skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: High Temperature Polymer Electrolyte Membrane Fuel Cells with High Phosphoric Acid Retention

Journal Article · · ACS Energy Letters
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [3];  [4];  [5];  [5]; ORCiD logo [3]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Korea Institute of Science and Technology, Seoul (Korea, Republic of)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Advent Technologies, Inc., Cambridge, MA (United States)
  5. Hyundai Motor Group, Uiwang-si (Korea, Republic of)

Phosphoric acid loss poses immense hurdles for the durability of high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs). Here we report quaternary ammonium-biphosphate ion-pair HT-PEMFCs that do not lose phosphoric acids under normal and accelerated stress conditions. Additionally, our energetics study explains the acid loss behavior of the conventional phosphoric acid-polybenzimidazole (PA-PBI) system by two mechanisms. If PA loss occurs via acid evaporation, the acid loss is constant over time. On the other hand, when water activity in the PA-PBI system is high, exponential decay of PA loss occurs via the water replacement mechanism. Combined 31P NMR and computational studies show that the proposed ion-pair system has six times higher interaction energy, which allows for containing all PAs in the membrane electrode assemblies under a broad range of operating conditions. In addition, polar interactions between the phosphonic acid ionomer and phosphoric acid explain acid retention in the electrodes of the ion-pair HT-PEMFCs.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Fuel Cell Technologies Office; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001; AR0001003; AC02-05CH11231
OSTI ID:
1906036
Report Number(s):
LA-UR-22-32502
Journal Information:
ACS Energy Letters, Vol. 8, Issue 1; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (36)

Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Durable High Polymer Content m / p -Polybenzimidazole Membranes for Extended Lifetime Electrochemical Devices journal February 2019
Long-Term Durability of PBI-Based HT-PEM Fuel Cells: Effect of Operating Parameters journal January 2018
Long-term cell degradation mechanism in high-temperature proton exchange membrane fuel cells journal July 2012
Synergistically integrated phosphonated poly(pentafluorostyrene) for fuel cells journal December 2020
Exceptional durability enhancement of PA/PBI based polymer electrolyte membrane fuel cells for high temperature operation at 200 °C journal January 2016
Approaches and Recent Development of Polymer Electrolyte Membranes for Fuel Cells Operating above 100 °C journal December 2003
Correlating Electrolyte Inventory and Lifetime of HT-PEFC by Accelerated Stress Testing journal January 2015
An operationally flexible fuel cell based on quaternary ammonium-biphosphate ion pairs journal August 2016
Ab initio molecular dynamics for open-shell transition metals journal November 1993
High-Temperature Polybenzimidazole Fuel Cell Membranes via a Sol−Gel Process journal September 2005
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Investigation of Platinum Oxidation in PEM Fuel Cells at Various Relative Humidities journal January 2007
Durability Studies of PBI‐based High Temperature PEMFCs journal July 2008
Durability and Degradation in High-Temperature Polymer Electrolyte Fuel Cells journal June 2006
Ab initio molecular-dynamics simulation of the liquid-metal–amorphous-semiconductor transition in germanium journal May 1994
Thermal curing of PBI membranes for high temperature PEM fuel cells journal January 2012
Degradation in phosphoric acid doped polymer fuel cells: A 6000 h parametric investigation journal May 2013
Durability of ABPBI-based MEAs for High Temperature PEMFCs at Different Operating Conditions journal April 2008
The CO Poisoning Effect in PEMFCs Operational at Temperatures up to 200°C journal January 2003
Highly Conductive and Mechanically Stable Imidazole-Rich Cross-Linked Networks for High-Temperature Proton Exchange Membrane Fuel Cells journal January 2020
Acid-Doped Polybenzimidazoles: A New Polymer Electrolyte journal January 1995
Protic ionic liquids immobilized in phosphoric acid-doped polybenzimidazole matrix enable polymer electrolyte fuel cell operation at 200 °C journal August 2020
Why do proton conducting polybenzimidazole phosphoric acid membranes perform well in high-temperature PEM fuel cells? journal January 2017
Investigation of Phosphoric Acid Distribution in PBI Based HT-PEM Fuel Cells journal September 2015
The Membrane–Electrode Interface in PEFCs journal January 2010
Effect of open circuit voltage on performance and degradation of high temperature PBI–H3PO4 fuel cells journal October 2006
Analysis of accelerated degradation of a HT-PEM fuel cell caused by cell reversal in fuel starvation condition journal February 2015
Energetics of Base–Acid Pairs for the Design of High-Temperature Fuel Cell Polymer Electrolytes journal August 2020
Fuel cells with an operational range of –20 °C to 200 °C enabled by phosphoric acid-doped intrinsically ultramicroporous membranes journal January 2022
Phenyl‐Free Polynorbornenes for Potential Anion Exchange Ionomers for Fuel Cells and Electrolyzers journal December 2022
Long-term durability of HT-PEM fuel cells based on thermally cross-linked polybenzimidazole journal February 2017
High temperature proton exchange membranes based on polybenzimidazoles for fuel cells journal May 2009
Protonated phosphonic acid electrodes for high power heavy-duty vehicle fuel cells journal January 2022
Properties of high-temperature PEFC Celtec®-P 1000 MEAs in start/stop operation mode journal February 2008
Effect of idling temperature on high temperature polymer electrolyte membrane fuel cell degradation under simulated start/stop cycling conditions journal November 2016