1
|
Wu B, Gan N, Lin Y, Zhang Y, Zhang J, Qiu Y, Cao X, Yu J, Matsuyama H. Ion-Selective Transport Promotion Enabled by Angstrom-Scale Nanochannels in Dendrimer-Assembled Polyamide Nanofilm for Efficient Electrodialysis. NANO LETTERS 2024; 24:8650-8657. [PMID: 38949785 DOI: 10.1021/acs.nanolett.4c01997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
The ion permeability and selectivity of membranes are crucial in nanofluidic behavior, impacting industries ranging from traditional to advanced manufacturing. Herein, we demonstrate the engineering of ion-conductive membranes featuring angstrom-scale ion-transport channels by introducing ionic polyamidoamine (PAMAM) dendrimers for ion separation. The exterior quaternary ammonium-rich structure contributes to significant electrostatic charge exclusion due to enhanced local charge density; the interior protoplasmic channels of PAMAM dendrimer are assembled to provide additional degrees of free volume. This facilitates the monovalent ion transfer while maintaining continuity and efficient ion screening. The dendrimer-assembled hybrid membrane achieves high monovalent ion permeance of 2.81 mol m-2 h-1 (K+), reaching excellent mono/multivalent selectivity up to 20.1 (K+/Mg2+) and surpassing the permselectivities of state-of-the-art membranes. Both experimental results and simulating calculations suggest that the impressive ion selectivity arises from the significant disparity in transport energy barrier between mono/multivalent ions, induced by the "exterior-interior" synergistic effects of bifunctional membrane channels.
Collapse
Affiliation(s)
- Baolong Wu
- National Engineering Research Center for Comprehensive Utilization of Salt Lake Resources, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Ning Gan
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Yuqing Lin
- National Engineering Research Center for Comprehensive Utilization of Salt Lake Resources, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yiren Zhang
- National Engineering Research Center for Comprehensive Utilization of Salt Lake Resources, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jiayu Zhang
- National Engineering Research Center for Comprehensive Utilization of Salt Lake Resources, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yulong Qiu
- National Engineering Research Center for Comprehensive Utilization of Salt Lake Resources, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xingzhong Cao
- Multi-disciplinary Research Division, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Jianguo Yu
- National Engineering Research Center for Comprehensive Utilization of Salt Lake Resources, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Hideto Matsuyama
- Research Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, Kobe 6500034, Japan
| |
Collapse
|
2
|
George TY, Thomas IC, Haya NO, Deneen JP, Wang C, Aziz MJ. Membrane-Electrolyte System Approach to Understanding Ionic Conductivity and Crossover in Alkaline Flow Cells. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 38050967 DOI: 10.1021/acsami.3c14173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Membrane transport properties are crucial for electrochemical devices, and these properties are influenced by the composition and concentration of the electrolyte in contact with the membrane. We apply this general membrane-electrolyte system approach to alkaline flow batteries, studying the conductivity and ferricyanide crossover of Nafion and E-620. We report undetectable crossover for as-received Nafion and E-620 after both sodium and potassium exchange but high ferricyanide permeability of 10-7 to 10-8 cm2 s-1 for Nafion subjected to pretreatment prevalent in the flow battery literature. We show how the electrolyte mass fraction in hydrated membranes regulates the influence of ion concentration on membrane conductivity, identifying that increasing electrolyte concentration may not increase membrane conductivity even when it increases electrolyte conductivity. To illustrate this behavior, we introduce a new metric, the membrane penalty, as the ratio of the conductivity of the electrolyte to that of the membrane equilibrated with the electrolyte. We discuss the trade-off between flow battery volumetric capacity and areal power density that arises from these findings. Finally, we apply insights from this approach to provide recommendations for use of membranes in alkaline flow cells and electrochemical reactors in general.
Collapse
Affiliation(s)
- Thomas Y George
- Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, Massachusetts 02138, United States
| | - Isabelle C Thomas
- Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, Massachusetts 02138, United States
- Emmanuel College, University of Cambridge, Cambridge CB2 1TN, U.K
| | - Naphtal O Haya
- Harvard College, Cambridge, Massachusetts 02138, United States
| | - John P Deneen
- Harvard College, Cambridge, Massachusetts 02138, United States
| | - Cliffton Wang
- Harvard College, Cambridge, Massachusetts 02138, United States
| | - Michael J Aziz
- Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, Massachusetts 02138, United States
| |
Collapse
|
3
|
Tsehaye MT, Tufa RA, Berhane R, Deboli F, Gebru KA, Velizarov S. Modified Membranes for Redox Flow Batteries-A Review. MEMBRANES 2023; 13:777. [PMID: 37755199 PMCID: PMC10536688 DOI: 10.3390/membranes13090777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/18/2023] [Accepted: 08/25/2023] [Indexed: 09/28/2023]
Abstract
In this review, the state of the art of modified membranes developed and applied for the improved performance of redox flow batteries (RFBs) is presented and critically discussed. The review begins with an introduction to the energy-storing chemical principles and the potential of using RFBs in the energy transition in industrial and transport-related sectors. Commonly used membrane modification techniques are briefly presented and compared next. The recent progress in applying modified membranes in different RFB chemistries is then critically discussed. The relationship between a given membrane modification strategy, corresponding ex situ properties and their impact on battery performance are outlined. It has been demonstrated that further dedicated studies are necessary in order to develop an optimal modification technique, since a modification generally reduces the crossover of redox-active species but, at the same time, leads to an increase in membrane electrical resistance. The feasibility of using alternative advanced modification methods, similar to those employed in water purification applications, needs yet to be evaluated. Additionally, the long-term stability and durability of the modified membranes during cycling in RFBs still must be investigated. The remaining challenges and potential solutions, as well as promising future perspectives, are finally highlighted.
Collapse
Affiliation(s)
- Misgina Tilahun Tsehaye
- Separation and Conversion Technology, Flemish Institute for Technological Research (VITO), Boeretang 200, 2400 Mol, Belgium
| | - Ramato Ashu Tufa
- Department of Environmental Engineering, University of Calabria (DIAm-UNICAL), Via P. Bucci CUBO 44/A, 87036 Rende, Italy
| | - Roviel Berhane
- Department of Environmental Engineering, University of Calabria (DIAm-UNICAL), Via P. Bucci CUBO 44/A, 87036 Rende, Italy
| | - Francesco Deboli
- Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Kibrom Alebel Gebru
- Lehrstuhl für Technische Chemie II, University of Duisburg-Essen, 45141 Essen, Germany
| | - Svetlozar Velizarov
- LAQV-REQUIMTE, Chemistry Department, NOVA School of Science and Technology (FCT NOVA), Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| |
Collapse
|