Publications

Publications by the working group led by Prof. Dr. Andrea Balducci since the beginning of their work at the Friedrich Schiller University Jena.

63 Publikationen filtern

Die Publikationen filtern

Highlighted authors are members of the University of Jena.

  1. A-Site Vacancy Engineering in KNbO₃ Perovskite for Enhanced Lithium Storage

    Year of publicationPublished in:Chemistry of materials : a publication of the American Chemical Society A. Khan, E. Quarez, N. Dupré, E. Gautron, A. Balducci, O. Crosnier, T. Brousse
    University Bibliography Jena:
    fsu_mods_00024160External link

  2. Dilithium squarate: A game-changing sacrificial salt for pre-lithiation and interphase stabilization in non-SEI forming electrolytes

    Year of publicationPublished in:Chemical Engineering Journal M. Granados-Moreno, R. Cid, M. Arnaiz, J. Gómez-Urbano, A. Balducci, E. Goikolea, J. Ajuria
    University Bibliography Jena:
    fsu_mods_00023540External link

  3. Electrochemical performance of electrochemical double layer capacitors containing pyrrolidinium and ammonium fluorosulfonyl imide in acetonitrile-based electrolytes

    Year of publicationPublished in:Electrochimica acta: the journal of the International Society of Electrochemistry I. Patil, T. Burton, A. Ladam, S. Fantini, A. Balducci
    In this study, we conducted a comprehensive analysis of the chemical-physical properties of electrolytes containing the ionic liquids N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide [Pyr₁₃FSI] and N-trimethyl-N-propylammonium bis (fluorosulfonyl)imide [N₁₁₁₃FSI] dissolved in acetonitrile (ACN). We showed that these innovative electrolytes display favourable transport and thermal properties. When used as electrolytes in electrical double layer capacitors (EDLCs), they allow the realization of devices with excellent energy and power density values, which can be maintained over a wide temperature range. When charge-discharge cycles are carried out, the stability of EDLCs containing these alternative electrolytes is comparable to that of devices containing conventional electrolytes. However, during float tests, their stability is affected by the occurrence of anodic dissolution of the Al current collectors.
    University Bibliography Jena:
    fsu_mods_00023462External link

  4. Sodium and Potassium Storage Behaviour in AgNbO₃ Perovskite

    Year of publicationPublished in:Batteries and Supercaps M. Orbay, A. Khan, O. Crosnier, T. Brousse, A. Balducci
    In this work, we report on the investigation the perovskite-type AgNbO₃ as a model negative electrode for sodium and potassium systems. We demonstrated that during the initial discharge, regardless of the inserted cation, the material undergoes an activation mechanism that induces a crystalline-to-amorphous transition. This transition, in turn, leads to an enhancement of the electrode capacity. At 5 A g−¹ sodium-ion AgNbO₃ and Potassium-ion AgNbO₃ display capacities of 81 mAh g−¹ and 60 mAh g−¹, respectively. Furthermore, both electrodes display good cycling stability and efficiency over 350 cycles at 1 A g−¹.
    University Bibliography Jena:
    fsu_mods_00018108External link

  5. Simulations of γ-Valerolactone Solvents and Electrolytes for Lithium Batteries Using Polarizable Molecular Dynamics

    Year of publicationPublished in:Molecules: a journal of synthetic chemistry and natural product chemistry A. Pierini, V. Migliorati, J. Gómez-Urbano, A. Balducci, S. Brutti, E. Bodo
    In this paper, we present a molecular dynamics study of the structural and dynamical properties of γ-valerolactone (GVL) both as a standalone solvent and in electrolyte formulations for electrochemistry applications. This study involves developing a new parameterization of a polarizable forcefield and applying it to simulate pure GVL and selected salt solutions. The forcefield was validated with experimental bulk data and quantum mechanical calculations, with excellent agreement obtained in both cases. Specifically, two 1M electrolyte solutions of lithium bis(fluorosulfonyl)imide and lithium bis(oxalate)borate in GVL were simulated, focusing on their ionic transport and highlighting ion solvation structure. Ion pairing in the electrolytes was also investigated through enhanced sampling molecular dynamics, obtaining a detailed picture of the ion dynamics in the GVL solution.
    University Bibliography Jena:
    fsu_mods_00019633External link

  6. Unravelling the mechanism of potassium-ion storage into graphite through electrolyte engineering

    Year of publicationPublished in:Energy Storage Materials L. Meyer, A. Thiagarajan, A. Koposov, A. Balducci
    Graphite is one of the most widely used anode materials in potassium-ion batteries (PIBs). However, the exact mechanism of K⁺ions intercalation into graphite has not yet been fully understood. In addition, the intercalation process strongly depends on the selection of the electrolyte system. In this work, we evaluated the use of an electrolyte containing 1.5 M potassium bis(fluorosulfonyl)imide (KFSI) dissolved in a mixture of propylene carbonate (PC)/ 1,1,2,2-tetraethoxyethane (TEG)/ vinyl ethylene carbonate (VEC) (62:36:2 vol.%). Using such an electrolyte system it was possible to obtain experimental evidence for the formation of KC₁₆ during the potassium intercalation and deintercalation using in situ Raman spectroscopy and operando X-ray diffraction (XRD). The results are supported by the visual observation of a color change of the graphite electrode surface during the intercalation of K⁺ ions into the graphite lattice. In addition, it has been demonstrated that the selected electrolyte system eliminates the co-intercalation of the solvent into the graphite structure.
    University Bibliography Jena:
    fsu_mods_00019256External link

  7. Glyoxal-based electrolytes for high-power potassium-based systems

    Year of publication L. Meyer
    University Bibliography Jena:
    fsu_mods_00025710External link

  8. Protic and Aprotic Acetate-Based Ionic Liquids as Electrolytes for Electrical Double Layer Capacitors

    Year of publicationPublished in:ChemElectroChem Z. Zheng, S. Liu, A. Balducci
    This work presents the synthesis, characterization, and application of a series of aprotic and protic acetate-based ionic liquids (AcILs). These cost-effective ILs can be obtained through a simple synthesis and display good transport and thermal properties. When used as electrolytes in electrical double-layer capacitors (EDLC) they enable the fabrication of devices with an operating voltage as high as 1.8 V, which display very good cycling and float stability. The performance of these devices can be tuned by adjusting the water content of the ILs. Notably, EDLCs containing AcILs can also be realized using aluminum current collectors.
    University Bibliography Jena:
    fsu_mods_00023528External link

  9. On the improvement of electrochemical capacitors: development of novel electrolytes and advanced characterization techniquel

    Year of publication F. Kreth
    University Bibliography Jena:
    fsu_mods_00023381External link

  10. Glyoxal-based electrolytes in potassium-ion capacitors

    Year of publicationPublished in:Journal of power sources: the international journal on the science and technology of battery, fuel cell and other electrochemical systems L. Meyer, D. Leistenschneider, A. Balducci
    Potassium-based energy storage systems demonstrate promising potential for use in high-power applications, such as potassium-ion capacitors (PICs). In this study, we present the use of an electrolyte containing 1,1,2,2-tetraethoxyethane (TEG) in combination with propylene carbonate (PC) and potassium bis(fluorosulfonyl)imide (KFSI) as electrolyte for PICs. We have shown that using this electrolyte and applying a designed test protocol, it is possible to realize PICs with good capacity and cycling stability. The high performance is possible due to the high-rate capability of the graphite electrodes in the proposed electrolyte. Subsequent analysis of the electrodes reveals both structural changes of the graphite electrode and changes in the chemical composition of the AC and graphite electrode surfaces.
    University Bibliography Jena:
    fsu_mods_00018364External link

  11. A lactic acid dioxolane as a bio-based solvent for lithium-ion batteries: physicochemical and electrochemical investigations of lithium imide-based electrolytes

    Year of publicationPublished in:Green chemistry : GC ; an international journal and green chemistry resource M. Melchiorre, K. Teoh, J. Gómez Urbano, F. Ruffo, A. Balducci
    In this study we report for the first time the application of an emerging bio-based solvent derived from lactic acid, namely 5-methyl-1,3-dioxolane-4-one (LA-H,H), as an electrolyte component for lithium-ion batteries (LIBs). Electrolyte formulations consisting of this novel bio-solvent and imide conducting salts (i.e. lithium bis(trifluoromethanesulfonyl)imide, LiTFSI, and lithium bis(fluorosulfonyl)imide, LiFSI) and the additive vinylene carbonate (VC) are prepared and thoroughly evaluated. Resulting formulations demonstrate suitable transport properties (e.g., conductivity, viscosity) and considerably low flammability compared to standard electrolyte formulations. The compatibility of the novel imide-based electrolytes with benchmark active materials such as graphite (GR) and lithium iron phosphate (LFP) are explored. The results indicate that the use of LA-H,H-LiTFSI 1 M 5 wt% VC allows high electrochemical performance in terms of rate-capability and cycling stability for both the graphite (339 mA h g−¹ at 1C) and the LFP (100 mA h g−¹ at 1C) electrodes. The suitability of this novel electrolyte configuration was further demonstrated through the assembly of a lab-scale full-cell LIB showing remarkable rate capability and cycling stability. These results indicate that LA-H,H can be used as an electrolyte component for LIBs, and pave the way for its use as bio-based solvent in energy storage systems.
    University Bibliography Jena:
    fsu_mods_00019505External link

  12. Safe electrolytes based on Glyoxylic-Acetals for Lithium- and Sodium-ion batteries

    Year of publication C. Leibing
    Within this thesis, the glyoxylic-acetals 1,1,2,2-tetramethoxyethane (TMG) and 1,1,2,2-tetraethoxyethane (TEG) have been investigated as electrolyte solvents for lithium-ion and sodium-ion batteries. TMG and TEG provide higher flash and boiling points compared to linear organic carbonates while simultaneously offering low melting points. Moreover, these solvents are available on a large scale, as they are industrially used as solubilizing agents. In the first part of this thesis, TMG and TEG are investigated as solvent components for lithium-ion battery electrolytes. Mixtures of TMG or respectively TEG with organic carbonate solvents are analyzed towards their physicochemical and electrochemical properties. Moreover, the effects of glyoxylic-acetals on the solid-electrolyte-interphase (SEI) formation on silicon-graphite composite electrodes are analyzed by electrochemical and spectroscopical means. The second part of the thesis concentrates on transferring the subject of glyoxylic-acetal-based electrolytes from lithium-ion to sodium-ion batteries (SIBs). Electrolytes containing these solvents are analyzed towards their viscosity, flash point, ionic conductivity and thermal stability, as well as tested in lab-scale SIBs. Furthermore the synthesis of a novel hard carbon material from brewer's spent grain is presented and the material is applied in combination with TEG containing electrolytes in lithium-, sodium- and potassium-ion battery half cells. The third part of this work is dedicated to the characterization of glyoxylic acetals as solvents in gel-polymer electrolytes. The objective of this approach is to combine the favorable thermal properties provided by TEG with the advantage of a leakage-safe electrolyte system.
    University Bibliography Jena:
    fsu_mods_00025527External link
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