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Schleker PPM, Grosu C, Paulus M, Jakes P, Schlögl R, Eichel RA, Scheurer C, Granwehr J. Electrolyte contact changes nano-Li 4Ti 5O 12 bulk properties via surface polarons. Commun Chem 2023; 6:113. [PMID: 37286703 DOI: 10.1038/s42004-023-00913-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 05/30/2023] [Indexed: 06/09/2023] Open
Abstract
It is of general interest to combine the faradaic processes based high energy density of a battery with the non-faradaic processes based high power density of a capacitor in one cell. Surface area and functional groups of electrode materials strongly affect these properties. For the anode material Li4Ti5O12 (LTO), we suggest a polaron based mechanism that influences Li ion uptake and mobility. Here we show electrolytes containing a lithium salt induce an observable change in the bulk NMR relaxation properties of LTO nano particles. The longitudinal 7Li NMR relaxation time of bulk LTO can change by almost an order of magnitude and, therefore, reacts very sensitively to the cation and its concentration in the surrounding electrolyte. The reversible effect is largely independent of the used anions and of potential anion decomposition products. It is concluded that lithium salt containing electrolytes increase the mobility of surface polarons. These polarons and additional lithium cations from the electrolyte can now diffuse through the bulk, induce the observed enhanced relaxation rate and enable the non-faradaic process. This picture of a Li+ ion equilibrium between electrolyte and solid may help with improving the charging properties of electrode materials.
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Affiliation(s)
- P Philipp M Schleker
- Institut für Grundlagen der Elektrochemie IEK-9, Forschungszentrum Jülich, Wilhelm-Johnen Straße, 52425, Jülich, Germany.
| | - Cristina Grosu
- Institut für Grundlagen der Elektrochemie IEK-9, Forschungszentrum Jülich, Wilhelm-Johnen Straße, 52425, Jülich, Germany
- Institut für Chemie, Technische Universität München, 85748, Garching b, München, Germany
| | - Marc Paulus
- Institut für Grundlagen der Elektrochemie IEK-9, Forschungszentrum Jülich, Wilhelm-Johnen Straße, 52425, Jülich, Germany
- Institut für Physikalische Chemie (IPC), RWTH Aachen University, D-52074, Aachen, Germany
| | - Peter Jakes
- Institut für Grundlagen der Elektrochemie IEK-9, Forschungszentrum Jülich, Wilhelm-Johnen Straße, 52425, Jülich, Germany
- Institut für Physikalische Chemie (IPC), RWTH Aachen University, D-52074, Aachen, Germany
| | - Robert Schlögl
- Fritz-Haber-Institut der Max-Planck-Gesellschaft Faradayweg 4-6, 14195, Berlin, Germany
| | - Rüdiger-A Eichel
- Institut für Grundlagen der Elektrochemie IEK-9, Forschungszentrum Jülich, Wilhelm-Johnen Straße, 52425, Jülich, Germany
- Institut für Physikalische Chemie (IPC), RWTH Aachen University, D-52074, Aachen, Germany
| | - Christoph Scheurer
- Institut für Grundlagen der Elektrochemie IEK-9, Forschungszentrum Jülich, Wilhelm-Johnen Straße, 52425, Jülich, Germany
- Fritz-Haber-Institut der Max-Planck-Gesellschaft Faradayweg 4-6, 14195, Berlin, Germany
| | - Josef Granwehr
- Institut für Grundlagen der Elektrochemie IEK-9, Forschungszentrum Jülich, Wilhelm-Johnen Straße, 52425, Jülich, Germany
- Institut für Technische und Makromolekulare Chemie (ITMC), RWTH Aachen University, D-52074, Aachen, Germany
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Paulus MC, Paulus A, Eichel RA, Granwehr J. Independent component analysis combined with Laplace inversion of spectrally resolved spin-alignment echo/T
1 3D 7Li NMR of superionic Li10GeP2S12. Z PHYS CHEM 2021. [DOI: 10.1515/zpch-2021-3136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Abstract
The use of independent component analysis (ICA) for the analysis of two-dimensional (2D) spin-alignment echo–T
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7Li NMR correlation data with transient echo detection as a third dimension is demonstrated for the superionic conductor Li10GeP2S12 (LGPS). ICA was combined with Laplace inversion, or discrete inverse Laplace transform (ILT), to obtain spectrally resolved 2D correlation maps. Robust results were obtained with the spectra as well as the vectorized correlation maps as independent components. It was also shown that the order of ICA and ILT steps can be swapped. While performing the ILT step before ICA provided better contrast, a substantial data compression can be achieved if ICA is executed first. Thereby the overall computation time could be reduced by one to two orders of magnitude, since the number of computationally expensive ILT steps is limited to the number of retained independent components. For LGPS, it was demonstrated that physically meaningful independent components and mixing matrices are obtained, which could be correlated with previously investigated material properties yet provided a clearer, better separation of features in the data. LGPS from two different batches was investigated, which showed substantial differences in their spectral and relaxation behavior. While in both cases this could be attributed to ionic mobility, the presented analysis may also clear the way for a more in-depth theoretical analysis based on numerical simulations. The presented method appears to be particularly suitable for samples with at least partially resolved static quadrupolar spectra, such as alkali metal ions in superionic conductors. The good stability of the ICA analysis makes this a prospect algorithm for preprocessing of data for a subsequent automatized analysis using machine learning concepts.
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Affiliation(s)
- Marc Christoffer Paulus
- Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH , 52425 Jülich , Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University , 52056 Aachen , Germany
| | - Anja Paulus
- Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH , 52425 Jülich , Germany
- Institute of Physical Chemistry, RWTH Aachen University , 52056 Aachen , Germany
| | - Rüdiger-Albert Eichel
- Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH , 52425 Jülich , Germany
- Institute of Physical Chemistry, RWTH Aachen University , 52056 Aachen , Germany
| | - Josef Granwehr
- Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH , 52425 Jülich , Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University , 52056 Aachen , Germany
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Reddy MV, Julien CM, Mauger A, Zaghib K. Sulfide and Oxide Inorganic Solid Electrolytes for All-Solid-State Li Batteries: A Review. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1606. [PMID: 32824170 PMCID: PMC7466729 DOI: 10.3390/nano10081606] [Citation(s) in RCA: 98] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 08/08/2020] [Accepted: 08/11/2020] [Indexed: 12/23/2022]
Abstract
Energy storage materials are finding increasing applications in our daily lives, for devices such as mobile phones and electric vehicles. Current commercial batteries use flammable liquid electrolytes, which are unsafe, toxic, and environmentally unfriendly with low chemical stability. Recently, solid electrolytes have been extensively studied as alternative electrolytes to address these shortcomings. Herein, we report the early history, synthesis and characterization, mechanical properties, and Li+ ion transport mechanisms of inorganic sulfide and oxide electrolytes. Furthermore, we highlight the importance of the fabrication technology and experimental conditions, such as the effects of pressure and operating parameters, on the electrochemical performance of all-solid-state Li batteries. In particular, we emphasize promising electrolyte systems based on sulfides and argyrodites, such as LiPS5Cl and β-Li3PS4, oxide electrolytes, bare and doped Li7La3Zr2O12 garnet, NASICON-type structures, and perovskite electrolyte materials. Moreover, we discuss the present and future challenges that all-solid-state batteries face for large-scale industrial applications.
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Affiliation(s)
- Mogalahalli V. Reddy
- Centre of Excellence in Transportation Electrification and Energy Storage (CETEES), Institute of Research Hydro-Québec, 1806, Lionel-Boulet Blvd., Varennes, QC J3X 1S1, Canada;
| | - Christian M. Julien
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, UMR-CNRS 7590, 4 place Jussieu, 75252 Paris, France;
| | - Alain Mauger
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, UMR-CNRS 7590, 4 place Jussieu, 75252 Paris, France;
| | - Karim Zaghib
- Department of Mining and Materials Engineering, McGill University, Wong Building, 3610 University Street, Montreal, QC H3A OC5, Canada
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