Pseudokapazitive Entsalzung mit nanolamellaren Metallkarbiden (MXen CDI)
Zusammenfassung der Projektergebnisse
The research project explored the use of MXenes, layered transition metal carbides/nitrides, as electrode materials in capacitive deionization (CDI) for water desalination and purification. CDI is a promising technology in this field, traditionally utilizing porous carbon materials to immobilize salt ions in the water stream. However, carbon materials have limited charge storage capacities, especially when dealing with highly saline media like seawater. To overcome these limitations, the project aimed to investigate the potential of MXenes as alternative electrode materials for CDI. MXenes have garnered significant interest in energy storage since their discovery in 2011, and we demonstrated the ability to use MXene for CDI as early as 2016. However, the chemical stability of (some) MXenes in water is a remaining issue, in addition to the higher material costs compared to other desalination materials. This research project highlighted the unique advantage of MXenes as 2D intercalation materials that can store salt ions between their layers, unlike carbon materials that rely on ion electrosorption at the fluid/solid interface. By focusing on CDI with MXene, the study aimed to explore the potential of these materials for improving the desalination efficiency and performance compared to traditional carbon electrodes. The three key findings of our work are: 1) Elaboration on the permselectivity of MXene used for cation removal that can be “forced” onto the counter-electrode even if the latter is non-permselective (such as activated carbon). 2) Exploration of the ion selectivity given by kinetic ion replacement effects within the MXene sheets. 3) The ability of the MXene interlayer space to be enhanced by non-MXene species (such as nanoscaled silver particles) to achieve both ion selectivity (toward Cl-) and high desalination performance.
Projektbezogene Publikationen (Auswahl)
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Charge-transfer materials for electrochemical water desalination, ion separation and the recovery of elements. Nature Reviews Materials, 5(7), 517-538.
Srimuk, Pattarachai; Su, Xiao; Yoon, Jeyong; Aurbach, Doron & Presser, Volker
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Combining Battery‐Type and Pseudocapacitive Charge Storage in Ag/Ti3C2Tx MXene Electrode for Capturing Chloride Ions with High Capacitance and Fast Ion Transport. Advanced Science, 7(18).
Liang, Mingxing; Wang, Lei; Presser, Volker; Dai, Xiaohu; Yu, Fei & Ma, Jie
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MXene/Activated-Carbon Hybrid Capacitive Deionization for Permselective Ion Removal at Low and High Salinity. ACS Applied Materials & Interfaces, 12(23), 26013-26025.
Torkamanzadeh, Mohammad; Wang, Lei; Zhang, Yuan; Budak, Öznil; Srimuk, Pattarachai & Presser, Volker
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In Situ Investigation of Expansion during the Lithiation of Pillared MXenes with Ultralarge Interlayer Distance. The Journal of Physical Chemistry C, 125(38), 20791-20797.
Maughan, Philip A.; Arnold, Stefanie; Zhang, Yuan; Presser, Volker; Tapia-Ruiz, Nuria & Bimbo, Nuno
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Time‐Dependent Cation Selectivity of Titanium Carbide MXene in Aqueous Solution. Advanced Sustainable Systems, 6(3).
Wang, Lei; Torkamanzadeh, Mohammad; Majed, Ahmad; Zhang, Yuan; Wang, Qingsong; Breitung, Ben; Feng, Guang; Naguib, Michael & Presser, Volker
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Toward MBenes Battery Electrode Materials: Layered Molybdenum Borides for Li‐Ion Batteries. Small Methods, 7(8).
Majed, Ahmad; Torkamanzadeh, Mohammad; Nwaokorie, Chukwudi F.; Eisawi, Karamullah; Dun, Chaochao; Buck, Audrey; Urban, Jeffrey J.; Montemore, Matthew M.; Presser, Volker & Naguib, Michael
