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Stachurski CD, Davis JH, Cosby T, Crowley ME, Larm NE, Ballentine MG, O’Brien RA, Zeller M, Salter EA, Wierzbicki A, Trulove PC, Durkin DP. Physical and Electrochemical Analysis of N-Alkylpyrrolidinium-Substituted Boronium Ionic Liquids. Inorg Chem 2023; 62:18280-18289. [PMID: 37870915 PMCID: PMC10630938 DOI: 10.1021/acs.inorgchem.3c02971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Indexed: 10/24/2023]
Abstract
In this work, a series of novel boronium-bis(trifluoromethylsulfonyl)imide [TFSI-] ionic liquids (IL) are introduced and investigated. The boronium cations were designed with specific structural motifs that delivered improved electrochemical and physical properties, as evaluated through cyclic voltammetry, broadband dielectric spectroscopy, densitometry, thermogravimetric analysis, and differential scanning calorimetry. Boronium cations, which were appended with N-alkylpyrrolidinium substituents, exhibited superior physicochemical properties, including high conductivity, low viscosity, and electrochemical windows surpassing 6 V. Remarkably, the boronium ionic liquid functionalized with both an ethyl-substituted pyrrolidinium and trimethylamine, [(1-e-pyrr)N111BH2][TFSI], exhibited a 6.3 V window, surpassing previously published boronium-, pyrrolidinium-, and imidazolium-based IL electrolytes. Favorable physical properties and straightforward tunability make boronium ionic liquids promising candidates to replace conventional organic electrolytes for electrochemical applications requiring high voltages.
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Affiliation(s)
| | - James H. Davis
- Department
of Chemistry, University of South Alabama, Mobile, Alabama36688, United States
| | - Tyler Cosby
- School
of Mathematics and Sciences, University
of Tennessee Southern, Pulaski, Tennessee38478, United States
| | - Margaret E. Crowley
- Department
of Chemistry, University of South Alabama, Mobile, Alabama36688, United States
| | - Nathaniel E. Larm
- Department
of Chemistry, U.S. Naval Academy, Annapolis, Maryland21402, United States
| | - Mollie G. Ballentine
- Department
of Chemistry, University of South Alabama, Mobile, Alabama36688, United States
| | - Richard A. O’Brien
- Department
of Chemistry, University of South Alabama, Mobile, Alabama36688, United States
| | - Matthias Zeller
- Department
of Chemistry, Purdue University, West Lafayette, Indiana47907, United States
| | - E. Alan Salter
- Department
of Chemistry, University of South Alabama, Mobile, Alabama36688, United States
| | - Andrzej Wierzbicki
- Department
of Chemistry, University of South Alabama, Mobile, Alabama36688, United States
| | - Paul C. Trulove
- Department
of Chemistry, U.S. Naval Academy, Annapolis, Maryland21402, United States
| | - David P. Durkin
- Department
of Chemistry, U.S. Naval Academy, Annapolis, Maryland21402, United States
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Herbers L, Küpers V, Winter M, Bieker P. An ionic liquid- and PEO-based ternary polymer electrolyte for lithium metal batteries: an advanced processing solvent-free approach for solid electrolyte processing. RSC Adv 2023; 13:17947-17958. [PMID: 37323458 PMCID: PMC10265719 DOI: 10.1039/d3ra02488a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 05/30/2023] [Indexed: 06/17/2023] Open
Abstract
A processing solvent-free manufacturing process for cross-linked ternary solid polymer electrolytes (TSPEs) is presented. Ternary electrolytes (PEODA, Pyr14TFSI, LiTFSI) with high ionic conductivities of >1 mS cm-1 are obtained. It is shown that an increased LiTFSI content in the formulation (10 wt% to 30 wt%) decreases the risk of short-circuits by HSAL significantly. The practical areal capacity increases by more than a factor of 20 from 0.42 mA h cm-2 to 8.80 mA h cm-2 before a short-circuit occurs. With increasing Pyr14TFSI content, the temperature dependency of the ionic conductivity changes from Vogel-Fulcher-Tammann to Arrhenius behavior, leading to activation energies for the ion conduction of 0.23 eV. In addition, high Coulombic efficiencies of 93% in Cu‖Li cells and limiting current densities of 0.46 mA cm-2 in Li‖Li cells were obtained. Due to a temperature stability of >300 °C the electrolyte guarantees high safety in a broad window of conditions. In LFP‖Li cells, a high discharge capacity of 150 mA h g-1 after 100 cycles at 60 °C was achieved.
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Affiliation(s)
- Lukas Herbers
- MEET Battery Research Center, Institute of Physical Chemistry, University of Münster 48149 Münster Germany
| | - Verena Küpers
- MEET Battery Research Center, Institute of Physical Chemistry, University of Münster 48149 Münster Germany
| | - Martin Winter
- MEET Battery Research Center, Institute of Physical Chemistry, University of Münster 48149 Münster Germany
- Helmholtz-Institute Münster (HIMS) IEK-12, Forschungszentrum Jülich GmbH 48149 Münster Germany
| | - Peter Bieker
- Helmholtz-Institute Münster (HIMS) IEK-12, Forschungszentrum Jülich GmbH 48149 Münster Germany
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Marinow A, Katcharava Z, Binder WH. Self-Healing Polymer Electrolytes for Next-Generation Lithium Batteries. Polymers (Basel) 2023; 15:polym15051145. [PMID: 36904385 PMCID: PMC10007462 DOI: 10.3390/polym15051145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/16/2023] [Accepted: 02/20/2023] [Indexed: 03/02/2023] Open
Abstract
The integration of polymer materials with self-healing features into advanced lithium batteries is a promising and attractive approach to mitigate degradation and, thus, improve the performance and reliability of batteries. Polymeric materials with an ability to autonomously repair themselves after damage may compensate for the mechanical rupture of an electrolyte, prevent the cracking and pulverization of electrodes or stabilize a solid electrolyte interface (SEI), thus prolonging the cycling lifetime of a battery while simultaneously tackling financial and safety issues. This paper comprehensively reviews various categories of self-healing polymer materials for application as electrolytes and adaptive coatings for electrodes in lithium-ion (LIBs) and lithium metal batteries (LMBs). We discuss the opportunities and current challenges in the development of self-healable polymeric materials for lithium batteries in terms of their synthesis, characterization and underlying self-healing mechanism, as well as performance, validation and optimization.
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Molodkina EB, Ehrenburg MR, Rudnev AV. Electrochemical Codeposition of Sm and Co in a Dicyanamide Ionic Liquid. RUSS J ELECTROCHEM+ 2022. [DOI: 10.1134/s1023193522120059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Ionic Liquid Confined in MOF/Polymerized Ionic Network Core-Shell Host as a Solid Electrolyte for Lithium Batteries. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.118271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Molodkina EB, Ehrenburg MR, Rudnev AV. Accelerating effect of water on electroreduction of lanthanide ions in a dicyanamide ionic liquid: A generic phenomenon. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Qiu C, Li Z, Pan J, Hong Y, Li J, Lin Y, Shi K, Liu Q. Designing Stable Electrode Interfaces from a Pyrrolidine-Based Electrolyte for Improving LiNi 0.8Co 0.1Mn 0.1O 2 Batteries. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chao Qiu
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhiqiang Li
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Jiajie Pan
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Yun Hong
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
- Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Rongjiang Laboratory), Jieyang 515200, China
| | - Junhao Li
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Yongxian Lin
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Kaixiang Shi
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
- Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Rongjiang Laboratory), Jieyang 515200, China
| | - Quanbing Liu
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
- Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Rongjiang Laboratory), Jieyang 515200, China
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García-Garabal S, Domínguez-Pérez M, Portela D, Varela L, Cabeza O. PRELIMINARY STUDY OF NEW ELECTROLYTES BASED ON [MPPyr][TFSI] FOR LITHIUM ION BATTERIES. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Kim J, Zhao F, Zhou S, Panse KS, Zhang Y. Spectroscopic Investigation of the Structure of a Pyrrolidinium-Based Ionic Liquid at Electrified Interfaces. J Chem Phys 2022; 156:114701. [DOI: 10.1063/5.0080051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The molecular structure of electric double layers (EDLs) at electrode-electrolyte interfaces is crucial for all types of electrochemical processes. Here we probe the EDL structure of an ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPy-TFSI), using electrochemical shell-isolated nanoparticle-enhanced Raman spectroscopy (EC-SHINERS). We extract the position and intensity of individual peaks corresponding to either intra- or inter-molecular vibrational modes, and examine their dependence on the electrode potential. The observed trends suggest that the molecular reconfiguration mechanism is distinct between cations and anions. BMPy+ is found to always adsorb on the Au electrode surface via the pyrrolidinium ring while the alkyl chains strongly change their orientation at different potentials. In contrast, TFSI- is observed to have pronounced position shifts but negligible orientation changes as we sweep the electrode potential. Despite their distinct reconfiguration mechanisms, BMPy+ and TFSI- in the EDL are likely paired together through strong intermolecular interaction.
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Affiliation(s)
- Jaehyeon Kim
- University of Illinois at Urbana-Champaign, United States of America
| | - Fujia Zhao
- University of Illinois at Urbana-Champaign, United States of America
| | - Shan Zhou
- University of Illinois at Urbana-Champaign, United States of America
| | - Kaustubh S. Panse
- University of Illinois at Urbana-Champaign, United States of America
| | - Yingjie Zhang
- Materials Science and Engineering, University of Illinois at Urbana-Champaign, United States of America
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Molodkina EB, Ehrenburg MR, Arkhipushkin IA, Rudnev AV. Interfacial effects in the electro(co)deposition of Nd, Fe, and Nd-Fe from an ionic liquid with controlled amount of water. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139342] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Philippi F, Welton T. Targeted modifications in ionic liquids - from understanding to design. Phys Chem Chem Phys 2021; 23:6993-7021. [PMID: 33876073 DOI: 10.1039/d1cp00216c] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Ionic liquids are extremely versatile and continue to find new applications in academia as well as industry. This versatility is rooted in the manifold of possible ion types, ion combinations, and ion variations. However, to fully exploit this versatility, it is imperative to understand how the properties of ionic liquids arise from their constituents. In this work, we discuss targeted modifications as a powerful tool to provide understanding and to enable design. A 'targeted modification' is a deliberate change in the structure of an ionic liquid. This includes chemical changes in an experiment as well as changes to the parameterisation in a computer simulation. In any case, such a change must be purposeful to isolate what is of interest, studying, as far as is possible, only one concept at a time. The concepts can then be used as design elements. However, it is often found that several design elements interact with each other - sometimes synergistically, and other times antagonistically. Targeted modifications are a systematic way of navigating these overlaps. We hope this paper shows that understanding ionic liquids requires experimentalists and theoreticians to join forces and provides a tool to tackle the difficult transition from understanding to design.
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Affiliation(s)
- Frederik Philippi
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, London W12 0BZ, UK.
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