المؤلفون: Hong, Chulgi Nathan, Yan, Mengwen, Borodin, Oleg, Pollard, Travis P., Wu, Langyuan, Reiter, Manuel, Vazquez, Dario Gomez, Trapp, Katharina, Yoo, Ji Mun, Shpigel, Netanel, Feldblyum, Jeremy I., Lukatskaya, Maria R.

المصدر: Energy & Environmental Science

الوصف: Controlling solid electrolyte interphase (SEI) in batteries is crucial for their efficient cycling. Herein, we demonstrate an approach to enable robust battery performance that does not rely on high fractions of fluorinated species in electrolytes, thus substantially decreasing the environmental footprint and cost of high-energy batteries. In this approach, we use very low fractions of readily reducible fluorinated cations in electrolyte (similar to 0.1 wt%) and employ electrostatic attraction to generate a substantial population of these cations at the anode surface. As a result, we can form a robust fluorine-rich SEI that allows for dendrite-free deposition of dense Li and stable cycling of Li-metal full cells with high-voltage cathodes. Our approach represents a general strategy for delivering desired chemical species to battery anodes through electrostatic attraction while using minute amounts of additive. ; ISSN:1754-5692 ; ISSN:1754-5706

وصف الملف: application/application/pdf

العلاقة: info:eu-repo/semantics/altIdentifier/wos/001228225100001; info:eu-repo/grantAgreement/SNF/SNSF Starting Grants/218234; http://hdl.handle.net/20.500.11850/675373Test

الإتاحة: https://doi.org/20.500.11850/67537310.3929/ethz-b-00067537310.1039/d4ee00296bTest
https://hdl.handle.net/20.500.11850/675373Test

المؤلفون: Wee, Shianlin, Lian, Xiliang, Vorobyeva, Evgeniya, Tayal, Akhil, Roddatis, Vladimir, La Mattina, Fabio, Gomez Vazquez, Dario, Shpigel, Netanel, Salanne, Mathieu, Lukatskaya, Maria R.

المصدر: ACS Nano

مصطلحات موضوعية: 2D materials, in situ X-rayabsorptionspectroscopy, ab initio molecular dynamics, MXenes, pseudocapacitance, transition metalintercalation, charge storage mechanism

الوصف: MXenes are 2D transition metal carbides, nitrides, and/or carbonitrides that can be intercalated with cations through chemical or electrochemical pathways. While the insertion of alkali and alkaline earth cations into Ti3C2Tx MXenes is well studied, understanding of the intercalation of redox-active transition metal ions into MXenes and its impact on their electronic and electrochemical properties is lacking. In this work, we investigate the intercalation of Cu ions into Ti3C2Tx MXene and its effect on its electronic and electrochemical properties. Using X-ray absorption spectroscopy (XAS) and ab initio molecular dynamics (AIMD), we observe an unusual phenomenon whereby Cu2+ ions undergo partial reduction upon intercalation from the solution into the MXene. Furthermore, using in situ XAS, we reveal changes in the oxidation states of intercalated Cu ions and Ti atoms during charging. We show that the pseudocapacitive response of Cu-MXene originates from the redox of both the Cu intercalant and Ti3C2Tx host. Despite highly reducing potentials, Cu ions inside the MXene show an excellent stability against full reduction upon charging. Our findings demonstrate how electronic coupling between Cu ions and Ti3C2Tx modifies electrochemical and electronic properties of the latter, providing the framework for the rational design and utilization of transition metal intercalants for tuning the properties of MXenes for various electrochemical systems. ; ISSN:1936-0851 ; ISSN:1936-086X

وصف الملف: application/application/pdf

العلاقة: info:eu-repo/semantics/altIdentifier/wos/001189807800001; http://hdl.handle.net/20.500.11850/667787Test

الإتاحة: https://doi.org/20.500.11850/667787Test
https://doi.org/10.3929/ethz-b-000667787Test
https://doi.org/10.1021/acsnano.3c12989Test
https://hdl.handle.net/20.500.11850/667787Test

المؤلفون: Malchik, Fyodor, Maldybayev, Kairgali, Kan, Tatyana, Kokhmetova, Saule, Chae, Munseok S., Kurbatov, Andrey, Galeyeva, Alina, Kaupbay, Olzhas, Nimkar, Amey, Bergman, Gil, Levi, Noam, Zhang, Hui, Jin, Qianqian, Lin, Zifeng, Shpigel, Netanel, Mandler, Daniel

المساهمون: Advanced Membranes and Porous Materials Research Center, Physical Science and Engineering (PSE) Division, Center of Physical-Chemical Methods of Research and Analysis, al-Farabi Kazakh National University, Almaty 050012, Kazakhstan, Department of Nanotechnology Engineering, Pukyong National University, Busan 48547, Republic of Korea, Department of Chemistry and BINA - BIU Center for Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel, School of Microelectronics and Materials Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China, College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China, Institute of Chemistry, the Hebrew University of Jerusalem, Jerusalem 9190401, Israel

الوصف: The use of Ti3C2Tx (MXene) electrodes for energy storage applications is gaining momentum. Considering the low flammability, high safety, and low cost of neutral aqueous electrolyte solutions, significant efforts have been devoted to the utilization of MXenes in this environment. However, despite the high stability and the excellent rate capability of MXene electrodes in neutral aqueous electrolytes, their capacity remains insufficient, usually below 30 mAh/g. This work aims to benefit from the spontaneous oxidation of MXene materials under ambient conditions to produce TiO2-coated MXene flakes. By using concentrated lithium chloride solutions, an extended potential window is obtained, allowing reversible insertion of lithium ions into MXene flakes and titanium dioxide nanoparticles. This results in significant capacity enhancement in MXene electrodes (by more than 200%) without impeding the MXene capacitive activity or its mechanical integrity. The prepared electrode presents long-term stability and high rate capability. ; The authors thank Prof. Yury Gogotsi for his valuable comments. This research is funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan (grant no. AP09058354). N.S. acknowledges the Israel Academy of Sciences and Humanities for its financial support. Z.L. thanks the National Natural Science Foundation of China (grant no. 52072252) for financial support.

وصف الملف: application/pdf; application/zip; image/jpeg

العلاقة: https://linkinghub.elsevier.com/retrieve/pii/S2666386423002916Test; Malchik, F., Maldybayev, K., Kan, T., Kokhmetova, S., Chae, M. S., Kurbatov, A., Galeyeva, A., Kaupbay, O., Nimkar, A., Bergman, G., Levi, N., Zhang, H., Jin, Q., Lin, Z., Shpigel, N., & Mandler, D. (2023). Boosting the capacity of MXene electrodes in neutral aqueous electrolytes. Cell Reports Physical Science, 4(7), 101507. https://doi.org/10.1016/j.xcrp.2023.101507Test; 2-s2.0-85165069406; Cell Reports Physical Science; 101507; http://hdl.handle.net/10754/693252Test

الإتاحة: https://doi.org/10.1016/j.xcrp.2023.101507Test
http://hdl.handle.net/10754/693252Test

المؤلفون: Bergman, Gil, Ballas, Elad, Gao, Qiang, Nimkar, Amey, Gavriel, Bar, Levi, Mikhael D., Sharon, Daniel, Malchik, Fyodor, Wang, Xuehang, Shpigel, Netanel, Mandler, Daniel, Aurbach, Doron

المصدر: Advanced Energy Materials ; volume 13, issue 8 ; ISSN 1614-6832 1614-6840

الوصف: The discovery of the Ti 3 C 2 T x compounds (MXenes) a decade ago opened new research directions and valuable opportunities for high‐rate energy storage applications. The unique ability of the MXenes to host various mono‐ and multivalent cations and their high stability in different electrolyte environments including aqueous, organic, and ionic liquid solutions, promoted the rapid development of advanced MXene‐based electrodes for a large variety of applications. Unlike the vast majority of typical intercalation compounds, the electrochemical performance of MXene electrodes is strongly influenced by the presence of co‐inserted solvent molecules, which cannot be detected by conventional current/potential electrochemical measurements. Furthermore, the electrochemical insertion of ions into MXene interspaces results in strong coupling with the intercalation‐induced structural, dimensional, and viscoelastic changes in the polarized MXene electrodes. To shed light on the charging mechanisms of MXene systems and their associated phenomena, the use of a large variety of real‐time monitoring techniques has been proposed in recent years. This review summarizes the most essential findings related to the charging mechanism of Ti 3 C 2 T x electrodes and their potential induced structural and mechanical phenomena obtained by in situ investigations.

الإتاحة: https://doi.org/10.1002/aenm.202203154Test

المؤلفون: Bergman, Gil, Bruchiel-Spanier, Netta, Bluman, Omer, Levi, Noam, Harpaz, Sara, Malchick, Fyodor, Wu, Langyuan, Sonoo, Masato, Chae, Munseok S., Wang, Guoxiu, Mandler, Daniel, Aurbach, Doron, Zhang, Yong, Shpigel, Netanel, Sharon, Daniel

المصدر: Journal of Materials Chemistry A; 6/28/2024, Vol. 12 Issue 24, p14456-14466, 11p

مستخلص: Zinc metal, with its high theoretical capacity and low cost, stands out as a promising anode material for affordable high energy-density storage technologies in rechargeable batteries. However, obtaining a high level of reversibility in zinc electrodeposition, which is pivotal for the success of rechargeable zinc-metal-based batteries, remains a significant challenge. A critical factor in this regard is the physicochemical characteristics of the electrolyte solution. Previous studies have indicated that adjusting the electrolyte solutions' composition with additives or co-solvents, along with fine-tuning concentrations and pH levels, can enhance the reversibility and kinetics of Zn deposition/stripping. However, the precise impact of Zn salts counter anions in the electrolyte solutions on these processes is not fully understood yet. Aiming to focus on the key fundamental aspects related to the electrolytes' influences on the Zn electroplating, we delve into the impact of anions on this process. Using advanced in situ and ex situ analytical methods, we reveal the role of the anions in the electrolyte solutions in zinc deposition/dissolution processes. Computational simulations shed light on the electrolytes' solvation structure, establishing a clear relationship between deposition behavior and the molecular variations specific to the different anions. These findings pave the way for new design principles aimed at optimizing the composition of electrolyte solutions for zinc metal batteries, potentially enhancing their performance and efficiency. [ABSTRACT FROM AUTHOR]

: Copyright of Journal of Materials Chemistry A is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

المؤلفون: Cao, Zhiqian, Zhu, Yin‐Bo, Chen, Kai, Wang, Quan, Li, Yujin, Xing, Xianjun, Ru, Jie, Meng, Ling‐Guo, Shu, Jie, Shpigel, Netanel, Chen, Li‐Feng

المصدر: Advanced Materials; 6/26/2024, Vol. 36 Issue 26, p1-9, 9p

المؤلفون: Wee, Shianlin, Lian, Xiliang, Vorobyeva, Evgeniya, Tayal, Akhil, Roddatis, Vladimir, La Mattina, Fabio, Vazquez, Dario Gomez, Shpigel, Netanel, Salanne, Mathieu, Lukatskaya, Maria R.

المصدر: ChemRxiv

مصطلحات موضوعية: 2D materials, MXene, X-ray spectroscopy, Charge storage

الوصف: MXenes are 2D transition metal carbides, nitrides, and/or carbonitrides, capable of intercalation by various cations through chemical or electrochemical means. Previous research has primarily focused on intercalating alkaline and alkaline earth cations, such as Li+, K+, Na+, Mg2+ or alkylammonium cations, into Ti3C2Tx MXenes. However, the impact of intercalated transition metal (TM) ions on the electronic and electrochemical properties of MXenes remains largely unexplored. In this study, we investigated the effects of pre-intercalated Cu ions on Ti3C2Tx MXenes and vice versa to gain a comprehensive understanding of how the electronic and electrochemical properties of both intercalated TM ion and MXene host are altered. Using in-situ X-ray absorption spectroscopy (XAS), we reveal changes in the oxidation states of intercalated Cu ions and Ti atoms during charging and their corresponding role in charge storage mechanisms. Our findings show that electronic coupling between Ti3C2Tx and Cu ions results in modified electrochemical and electronic properties compared to pristine Ti3C2Tx. These insights lay the foundation for the rational design and utilization of TM ion intercalants to tailor the properties of MXenes for various electrochemical systems and beyond. ; ISSN:2573-2293

وصف الملف: application/application/pdf

العلاقة: http://hdl.handle.net/20.500.11850/653583Test

الإتاحة: https://doi.org/20.500.11850/653583Test
https://doi.org/10.3929/ethz-b-000653583Test
https://doi.org/10.26434/chemrxiv-2023-84f91Test
https://hdl.handle.net/20.500.11850/653583Test

المؤلفون: Lian, Xiliang, Wee, Shianlin, Vorobyeva, Evgeniya, Tayal, Akhil, Roddatis, Vladimir, La Mattina, Fabio, Gomez Vazquez, Dario, Shpigel, Netanel, Salanne, Mathieu, Lukatskaya, Maria R.

مصطلحات موضوعية: 2D materials, in situ X-ray absorption spectroscopy, ab initio molecular dynamics, MXenes, pseudocapacitance, transition metal intercalation, charge storage mechanism

الوصف: MXenes are 2D transition metal carbides, nitrides, and/or carbonitrides that can be intercalated with cations through chemical or electrochemical pathways. While the insertion of alkali and alkaline earth cations into Ti 3 C 2 T x MXenes is well studied, understanding of the intercalation of redox-active transition metal ions into MXenes and its impact on their electronic and electrochemical properties is lacking. In this work, we investigate the intercalation of Cu ions into Ti 3 C 2 T x MXene and its effect on its electronic and electrochemical properties. Using X-ray absorption spectroscopy (XAS) and ab initio molecular dynamics (AIMD), we observe an unusual phenomenon whereby Cu 2+ ions undergo partial reduction upon intercalation from the solution into the MXene. Furthermore, using in situ XAS, we reveal changes in the oxidation states of intercalated Cu ions and Ti atoms during charging. We show that the pseudocapacitive response of Cu-MXene originates from the redox of both the Cu intercalant and Ti 3 C 2 T x host. Despite highly reducing potentials, Cu ions inside the MXene show an excellent stability against full reduction upon charging. Our findings demonstrate how electronic coupling between Cu ions and Ti 3 C 2 T x modifies electrochemical and electronic properties of the latter, providing the framework for the rational design and utilization of transition metal intercalants for tuning the properties of MXenes for various electrochemical systems.

العلاقة: ACS Nano--ACS Nano--journals:8--1936-0851--1936-086X; empa:37558; scopus: 2-s2.0-85188536757; pmid: 38511608; journal id: journals:8; e-issn: 1936-086X; ut: 001189807800001

الإتاحة: https://doi.org/10.1021/acsnano.3c12989Test

المؤلفون: Tubul, Nophar, Levi, Noam, Bergman, Gil, Nimkar, Amey, Sonoo, Masato, Lulu-Bitton, Noa, Haroush, Shlomo, Gelbstein, Yaniv, Sharon, Daniel, Shpigel, Netanel, Aurbach, Doron

المصدر: ACS Sustainable Chemistry & Engineering ; volume 12, issue 14, page 5468-5474 ; ISSN 2168-0485 2168-0485

مصطلحات موضوعية: Renewable Energy, Sustainability and the Environment, General Chemical Engineering, Environmental Chemistry, General Chemistry

الإتاحة: https://doi.org/10.1021/acssuschemeng.3c07689Test

المؤلفون: Malchik, Fyodor, Maldybayev, Kairgali, Kan, Tatyana, Kokhmetova, Saule, Kurbatov, Andrey, Galeyeva, Alina, Kaupbay, Olzhas, Kiyatova, Marzhan, Shpigel, Netanel

مصطلحات موضوعية: Type of access: Embargo, MXene, energy storage applications

الوصف: The use of Ti3C2Tx (MXene) electrodes for energy storage applications is gaining momentum in recent years. The ability of the MXene to host a large variety of mono and multivalent ions regardless of their charge or ionic radius makes it an attractive anode for aqueous and non-aqueous batteries and supercapacitor devices.

العلاقة: Malchik, F. Maldybayev, K. Kan, T. Kokhmetova, S. Kurbatov, A. Galeyeva, A. Kaupbay, O. Kiyatova, M. Shpigel, N. Boosting MXene capacity by self-oxidation in air atmosphere for water-in-salt electrolyte-based supercapaci. National Laboratory Astana; http://nur.nu.edu.kz/handle/123456789/6620Test

الإتاحة: http://nur.nu.edu.kz/handle/123456789/6620Test