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法国巴黎西岱大学招收csc博士（水系电池）
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巴黎西岱大学（原名巴黎大学，CWUR世界大学排名39 ）Veronique Balland教授现准备招收2025年CSC-University Paris City合作项目博士生一名。 课题主要由Veronique Balland教授负责，课题方向为高浓度水系电解液。导师人很好，认真负责，不push，最近几年发表的论文包括1篇JACS和3篇AEM。巴黎西岱大学位于巴黎市区，交通便利。 联系方法：veronique.balland@u-paris.fr Project： The main objectives of the PhD project are twofold. Firstly, to study and understand the evolution of electrode potentials as a function of the chemical composition of the electrolyte, drawing on plausible proposals for single- or multi-step cation insertion mechanisms to take into account the reversible and complex processes of ion desolvation/solvation at the electrode/solution interface. Beyond the effect of single salt concentration, we will also investigate the influence of the chemicalnature of the anion, as well as the influence of inert salts allowing to independently vary the concentration in the cation of interest and the activity of water. We will focus specifically on two types of electrode materials: firstly, TiO₂ (anatase), which enables the reversible and selective insertion of lithium ions at low potential, and secondly, Prussian blue, which enables the reversible and selective insertion of potassium ions at high potentials. Their electrochemical behavior will be systematically analyzed using three-electrode setups, incorporating a reference electrode for precise electrode potential measurements while varying the chemical composition of the electrolyte. This approach will allow the establishment of a database, which will then be used to test multi-step insertion mechanisms. In the second phase, the knowledge gained will be applied to design a dual-cation Li+/K+ electrolyte that enables independent modulation of the anode and cathode potentials in a battery-type assembly. In this configuration, TiO₂ (or its analogues) will be used as the anode material, while Prussian blue (or its derivatives) will serve as the cathode material. By properly adjusting the ionic strength and the Li+/K+ ratio, we will provide proof-of-concept that this approach maximizes the potential difference between the anode and cathode, contributing to a significant increase in energy density and overall battery performance, while simultaneously mitigating parasitic reactions associated with hydrogen or oxygen evolution by decreasing water activity. Team & Laboratory： The PhD student will join the TERE (Electron Transfer and Electrochemical Reactivity) team of the ITODYS laboratory, to which the current Laboratory of Molecular Electrochemistry will be merged from 1 January 2025. The PhD student will be under the direct supervision of Pr. Véronique Balland, full Professor at University Paris Cité. Pr. Balland has an internationally recognized expertise in electrochemistry of molecules and materials and has made several important fundamental contributions since 2017 in the field of rechargeable aqueous batteries, notably by providing new insights in the charge storage mechanisms of different metal oxide electrode materials (TiO₂, MnO₂, WO3).4–6 Among our most significant findings is on the role that multivalent metal cations can play as proton donors in the charge storage mechanism of a wide range of electrode materials in aqueous electrolytes.7 This better fundamental understanding of charge storage mechanisms and the role played by the electrolyte constituents has enabled us to propose technological advances, especially in the development of energy storage smart windows.8 Looking for a scientifically curious and highly motivated student with skills in electrochemistry, energy storage and/or conversion, aqueous electrolytes (including water-in-salt electrolytes), material characterization. Please send CV and motivation letter to veronique.balland@u-paris.fr. References (1) Xu, K.; Wang, C. Batteries: Widening Voltage Windows. Nat. Energy 2016, 1 (10), 16161. https://doi.org/10.1038/nenergy.2016.161. (2) Martins, V. L.; Torresi, R. M. Water-in-Salt Electrolytes for High Voltage Aqueous Electrochemical Energy Storage Devices. Curr. Opin. Electrochem. 2020, 21, 62–68. https://doi.org/10.1016/j.coelec.2020.01.006. (3) Takenaka, N.; Ko, S.; Kitada, A.; Yamada, A. Liquid Madelung Energy Accounts for the Huge Potential Shift in Electrochemical Systems. Nat. Commun. 2024, 15 (1), 1319. https://doi.org/10.1038/s41467-023-44582-4. (4) Makivić, N.; Cho, J.-Y.; Harris, K. D.; Tarascon, J.-M.; Limoges, B.; Balland, V. Evidence of Bulk Proton Insertion in Nanostructured Anatase and Amorphous TiO2 Electrodes. Chem. Mater. 2021, 33 (9), 3436–3448. https://doi.org/10.1021/acs.chemmater.1c00840. (5) Mateos, M.; Makivic, N.; Kim, Y.; Limoges, B.; Balland, V. Accessing the Two‐Electron Charge Storage Capacity of MnO2 in Mild Aqueous Electrolytes. Adv. Energy Mater. 2020, 10 (23), 2000332. https://doi.org/10.1002/aenm.202000332. (6) Makivić, N.; Harris, K. D.; Tarascon, J.; Limoges, B.; Balland, V. Impact of Reversible Proton Insertion on the Electrochemistry of Electrode Materials Operating in Mild Aqueous Electrolytes: A Case Study with TiO2. Adv. Energy Mater. 2023, 13 (3), 2203122. https://doi.org/10.1002/aenm.202203122. (7) Kim, Y.-S.; Harris, K. D.; Limoges, B.; Balland, V. On the Unsuspected Role of Multivalent Metal Ions on the Charge Storage of a Metal Oxide Electrode in Mild Aqueous Electrolytes. Chem. Sci. 2019, 10 (38), 8752–8763. https://doi.org/10.1039/C9SC02397F. (8) Palamadathil Kannattil, H.; Martinez Soria Gallo, L.; Harris, K. D.; Limoges, B.; Balland, V. Innovative Energy Storage Smart Windows Relying on Mild Aqueous Zn/MnO 2 Battery Chemistry. Adv. Sci. 2024, 2402369. https://doi.org/10.1002/advs.202402369. |
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