Bipolar membranes (BPMs) have proven useful in numerous electrochemical energy conversion and storage applications, including fuel cells and electrolyzers. However, water dissociation in bipolar membrane electrolysis cells (BPMECs) is a complicated phenomenon that occurs via several different pathways.
On the effect of anion exchange ionomer binders in bipolar electrode membrane …
Bipolar membrane|electrode interface water electrolyzers (BPEMWE) were found to outperform a proton exchange membrane (PEM) water electrolyzer reference in a similar membrane electrode assembly (MEA) design based on individual porous transport electrodes (PTE) and a free-standing membrane. We present a detai
A bipolar membrane dissociates water into H + and OH − due to the two-layered ion membrane structure, which allows maintaining a different pH at either side of …
Membranes | Free Full-Text | A Review of the Transition Region of Membrane Electrode Assembly of Proton Exchange Membrane …
As the core component of a proton exchange fuel cell (PEMFC), a membrane electrode assembly (MEA) consists of function region (active area), structure region, and transition region. Situated between the function and structure regions, the transition region influences the reliability and durability of the MEA. The degradation of …
Protocol for assembling and operating bipolar membrane water …
Cut several 0.010, 0.005, and 0.002 in gaskets from polyester sheets (McMaster-Carr) so they have a 1 cm × 1 cm hole for the electrodes, and two alignment holes according to Figure 2.We used a laser cutter (Universal, PLS 6.120). Download: Download high-res image (124KB) ...
Multi-scale physics of bipolar membranes in electrochemical …
Bipolar membranes (BPMs) enable control of ion concentrations and fluxes in electrochemical cells suitable for a wide range of applications. Here we present …
Bipolar Membrane Electrode Assemblies for Water Electrolysis – …
Bipolar Membrane Electrode Assemblies for Water Electrolysis – Goals and Challenges Britta Mayerhöfer 1,2, Konrad Ehelebe 1,2, Florian Dominik Speck 1,2, Markus Bierling 1,3, David McLaughlin 1,2, Thomas Böhm 1,2, Manuel Hegelheimer 1,2, Serhiy Cherevko 1, Retha Peach 1 and Simon Thiele 4,1
We present the first combination of a bipolar interface fuel cell with a commercial Fe–N/C catalyst as an alkaline cathode and a PGM-based, acidic anode, both separated by a proton exchange membrane (PEM). This membrane electrode assembly (MEA) concept enables the employment of Fe–N/C catalysts in a less cor
Bipolar membranes (BPMs) are gaining interest in energy conversion technologies. These membranes are composed of cation- and anion-exchange layers, with an interfacial layer in between. This gives the …
High-Voltage Aqueous Redox Flow Batteries Enabled by Catalyzed Water Dissociation and Acid–Base Neutralization in Bipolar Membranes …
Aqueous redox flow batteries that employ organic molecules as redox couples hold great promise for mitigating the intermittency of renewable electricity through efficient, low-cost diurnal storage. However, low cell potentials and sluggish ion transport often limit the achievable power density. Here, we explore bipolar membrane (BPM) …
Electrochemical CO2 reduction in membrane-electrode assemblies
Meanwhile, the CO 2 mass-transport characteristics in membrane-electrode assembly (MEA) cells or gas diffusion electrode (GDE) cells are also influenced by the reactor configuration, electrode structure, catholyte selection, and operation conditions (e.g., pH 19
Bipolar membranes for intrinsically stable and scalable CO2 …
Bipolar membranes for intrinsically stable and scalable CO 2 electrolysis Kostadin V. Petrov 1,3, Christel I. Koopman ... electrode assembly in forward-bias configuration (c). All of the ...
Bipolar membranes: A review on principles, latest developments, …
Semantic Scholar extracted view of "Bipolar membranes: A review on principles, latest developments, and applications" by R. Pärnamäe et al. DOI: 10.1016/j.memsci.2020.118538 Corpus ID: 224868801 Bipolar membranes: A review on principles, latest
Tunable Optical Sensing with PVC-Membrane-Based Ion-Selective Bipolar Electrodes …
We show here that the response of ion-selective membrane electrodes (ISEs) based on traditional PVC membranes can be directly translated to a colorimetric readout by a closed bipolar electrode (BPE) arrangement. Because the resulting optical response is based on the turnover of the redox probe, ferroin, dissolved in a thin layer …
A systematic analysis and optimization of bicarbonate electrolysis based on a bipolar membrane …
A multiscale model unites bipolar membrane and cathode in bicarbonate electrolysis. • BPM water dissociation attenuation via ohmic and concentration loss. • Metrics for BPM water dissociation: (limited) efficiency, onset current density. • Synergistic
Design principles for efficient photoelectrodes in solar rechargeable redox …
It has been accepted that conventional redox reactions in RFB are non-selective with respect to the electrode material 22 ... Replacing the Nafion by the bipolar membrane can be an alternative ...
Membrane electrode assemblies for PEM fuel cells: A review of functional graded design and optimization …
1. Introduction Rapid industrialization and urbanization have led to an increased consumption of energy and serious global warming in the 21st century [[1], [2], [3], [4]].The carbon dioxide (CO 2) content in the atmosphere has increased by 30% since the industrial era began [5], of which approximately 17% came from the burning of fossil fuel …
Membrane electrode assembly design to prevent CO2 crossover …
This comment highlights the recent innovative design of membrane electrode assembly, utilizing a bipolar membrane and catholyte layer that blocks CO2 cross-over and enables high CO2 single-pass ...
Tunable Optical Sensing with PVC Membrane Based Ion-Selective Bipolar Electrodes …
We show here that the response of ion-selective membrane electrodes (ISEs) based on traditional PVC membranes can be directly translated into a colorimetric readout by a closed bipolar electrode ...
Bipolar Membrane Electrode Assemblies for Water Electrolysis
Water Supply to the Bipolar Interface. In commonly used PEM or AEM electrolyzers, water is provided through the porous transport layers (PTLs) to at least one electrode. Thus, …
This value represents the dark resistance of the photocell, typically in the range of several kilo-ohms (kΩ) to mega-ohms (MΩ), depending on the specific type of photocell being used. Document this resistance value, as it will serve as a reference for comparing resistance changes when the photocell is exposed to light in subsequent steps.
Improvement in the desalination performance of membrane capacitive deionization with a bipolar electrode …
Recently, the bipolar MCDI module has gained much attention, in which stacked electrodes are connected in series without conducting wiring (Fig. 1 a).As compared in Fig. 1 b and c, contrary to unipolar MCDI, there is no requirement for terminals for applying electrical energy, since the bipolar electrodes (inner electrode of the …
Abstract. Bipolar membranes (BPMs) have the potential to become critical components in electrochemical devices for a variety of electrolysis and electrosynthesis applications. Because they can operate …
The "gas diffusion layer" is added between the catalyst and the bipolar plate to provide some rigidity to the MEA and to ensure ease of diffusion. This layer is usually composed of carbon cloth or carbon paper 0.2–0.5mm thickness, with more PTFE added to
The Rationale for a Standardized Testing Protocol for Anion Exchange Membrane …
The influence of cell temp., membrane-electrode assembly (MEA) procedure (catalyst-coated membrane or catalyst coated electrode), and pure water or KOH soln. on electrolyzer performance are analyzed. It appears that the catalyst-coated membrane approach, using the FAA3-50 membrane, allows higher temp. operation.
