Pore-filled anion-exchange membranes for electrochemical energy conversion applications

2016 ◽  
Vol 222 ◽  
pp. 212-220 ◽  
Author(s):  
Do-Hyeong Kim ◽  
Jin-Soo Park ◽  
Myounghoon Choun ◽  
Jaeyoung Lee ◽  
Moon-Sung Kang
Keyword(s):  
Energy Conversion ◽  
Anion Exchange ◽  
Anion Exchange Membranes ◽  
Electrochemical Energy Conversion ◽  
Electrochemical Energy

Highly conductive fluorine-based anion exchange membranes with robust alkaline durability

2020 ◽  
Vol 8 (26) ◽  
pp. 13065-13076
Author(s):  
Xue Lang Gao ◽  
Li Xuan Sun ◽  
Hong Yue Wu ◽  
Zhao Yu Zhu ◽  
Nan Xiao ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Ionic Conductivity ◽  
Energy Conversion ◽  
Anion Exchange ◽  
High Ionic Conductivity ◽  
Anion Exchange Membranes ◽  
Alkaline Stability ◽  
Electrochemical Energy Conversion ◽  
Energy Conversion Devices ◽  
Electrochemical Energy

Anion exchange membranes (AEMs) with robust alkaline stability and high ionic conductivity are imminently required for the promising electrochemical energy conversion devices – fuel cells.

scholarly journals Pore-Filled Anion-Exchange Membranes with Double Cross-Linking Structure for Fuel Cells and Redox Flow Batteries

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4761
Author(s):  
Do-Hyeong Kim ◽  
Moon-Sung Kang
Keyword(s):  
Fuel Cells ◽  
Energy Conversion ◽  
Anion Exchange ◽  
Cross Linking ◽  
Anion Exchange Membranes ◽  
Porous Substrate ◽  
Redox Flow Batteries ◽  
Vanadium Redox ◽  
Double Cross ◽  
Electrochemical Energy

In this work, high-performance pore-filled anion-exchange membranes (PFAEMs) with double cross-linking structures have been successfully developed for application to promising electrochemical energy conversion systems, such as alkaline direct liquid fuel cells (ADLFCs) and vanadium redox flow batteries (VRFBs). Specifically, two kinds of porous polytetrafluoroethylene (PTFE) substrates, with different hydrophilicities, were utilized for the membrane fabrication. The PTFE-based PFAEMs revealed, both excellent electrochemical characteristics, and chemical stability in harsh environments. It was proven that the use of a hydrophilic porous substrate is more desirable for the efficient power generation of ADLFCs, mainly owing to the facilitated transport of hydroxyl ions through the membrane, showing an excellent maximum power density of around 400 mW cm−2 at 60 °C. In the case of VRFB, however, the battery cell employing the hydrophobic PTFE-based PFAEM exhibited the highest energy efficiency (87%, cf. AMX = 82%) among the tested membranes, because the crossover rate of vanadium redox species through the membrane most significantly affects the VRFB efficiency. The results imply that the properties of a porous substrate for preparing the membranes should match the operating environment, for successful applications to electrochemical energy conversion processes.

(Invited) Carbon Coatings for Components in Anion Exchange Membrane Electrochemical Energy Conversion

2020 ◽  
Vol MA2020-02 (37) ◽  
pp. 2376-2376
Author(s):  
Sebastian Karl Proch ◽  
Ulf Bexell ◽  
Claire Moffatt ◽  
Anna Jansson ◽  
Mikael Stenström ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Anion Exchange ◽  
Anion Exchange Membrane ◽  
Carbon Coatings ◽  
Electrochemical Energy Conversion ◽  
Exchange Membrane ◽  
Electrochemical Energy

scholarly journals Structural tuning of heterogeneous molecular catalysts for electrochemical energy conversion

2021 ◽  
Vol 7 (13) ◽  
pp. eabf3989
Author(s):  
Jiong Wang ◽  
Shuo Dou ◽  
Xin Wang
Keyword(s):  
Energy Conversion ◽  
Model Systems ◽  
Structural Variations ◽  
Metal Centers ◽  
Electrochemical Energy Conversion ◽  
Electronic Configurations ◽  
Coordination Spheres ◽  
The Stability ◽  
Molecular Catalysts ◽  
Electrochemical Energy

Heterogeneous molecular catalysts based on transition metal complexes have received increasing attention for their potential application in electrochemical energy conversion. The structural tuning of first and second coordination spheres of complexes provides versatile strategies for optimizing the activities of heterogeneous molecular catalysts and appropriate model systems for investigating the mechanism of structural variations on the activity. In this review, we first discuss the variation of first spheres by tuning ligated atoms; afterward, the structural tuning of second spheres by appending adjacent metal centers, pendant groups, electron withdrawing/donating, and conjugating moieties on the ligands is elaborated. Overall, these structural tuning resulted in different impacts on the geometric and electronic configurations of complexes, and the improved activity is achieved through tuning the stability of chemisorbed reactants and the redox behaviors of immobilized complexes.

scholarly journals Single-Atom Catalysts: A Perspective toward Application in Electrochemical Energy Conversion

JACS Au ◽  
2021 ◽  
Author(s):  
Florian D. Speck ◽  
Jae Hyung Kim ◽  
Geunsu Bae ◽  
Sang Hoon Joo ◽  
Karl J. J. Mayrhofer ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Single Atom ◽  
Electrochemical Energy Conversion ◽  
Electrochemical Energy
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