Mass transport properties in quasi-solidified lithium-ion conducting ionic liquids at oxide particle surfaces

2012 ◽  
Vol 225 ◽  
pp. 416-419 ◽  
Author(s):  
Atsushi Unemoto ◽  
Yoshiki Iwai ◽  
Satoshi Mitani ◽  
Seung-Wook Baek ◽  
Seitaro Ito ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Mass Transport ◽  
Transport Properties ◽  
Oxide Particle ◽  
Lithium Ion ◽  
Ion Conducting

Effect of solvated ionic liquids on the ion conducting property of composite membranes for lithium ion batteries

2018 ◽  
Vol 44 (10) ◽  
pp. 6039-6051 ◽  
Author(s):  
Jae-Yeong Park ◽  
Jun-Woo Park ◽  
Chil-Hoon Doh ◽  
Yoon-Cheol Ha ◽  
Sang-Min Lee ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Composite Membranes ◽  
Conducting Property ◽  
Ion Conducting

Electrical conductivity and dynamics of quasi-solidified lithium-ion conducting ionic liquid at oxide particle surfaces

2011 ◽  
Vol 201 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Atsushi Unemoto ◽  
Yoshiki Iwai ◽  
Satoshi Mitani ◽  
Seung-Wook Baek ◽  
Seitaro Ito ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Ionic Liquid ◽  
Oxide Particle ◽  
Lithium Ion ◽  
Ion Conducting

scholarly journals Structure–Property Relationship of Polymerized Ionic Liquids for Solid-State Electrolyte Membranes

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 792
Author(s):  
Robert Löwe ◽  
Thomas Hanemann ◽  
Tatiana Zinkevich ◽  
Andreas Hofmann
Keyword(s):  
Ionic Liquids ◽  
Glass Transition ◽  
Ionic Conductivity ◽  
Salt Content ◽  
Lithium Ion ◽  
Transition Temperatures ◽  
Structure Property ◽  
Glass Transition Temperatures ◽  
Conducting Salt ◽  
Ion Conducting

Eight new polymerized ammonium-based ionic liquids were prepared as thin membrane films and evaluated within the scope of their usage in lithium-ion batteries. The focus of this work is to get a better understanding of the influence of structural modifications of the monomers on the polymerized materials. Further, different concentrations of a lithium-ion conducting salt were applied in order to receive an optimized combination of monomer structure and lithium salt concentration. It was found that an increased side chain length of the studied ammonium-based polymerized ionic liquids leads to a reduction in glass transition temperatures and increased ionic conductivity values. As a result of the addition of conducting salt to the PIL membranes, the glass transition temperatures and the ionic conductivity values decreases. Nevertheless, PFG-NMR reveals a higher lithium-ion mobility for a sample with higher conducting salt content.

scholarly journals Impedance, circuit simulation, transport properties and energy storage behavior of plasticized lithium ion conducting chitosan based polymer electrolytes

2021 ◽  
pp. 107286
Author(s):  
Shujahadeen B. Aziz ◽  
Ahmad S.F.M. Asnawi ◽  
Pshko A. Mohammed ◽  
Rebar T. Abdulwahid ◽  
Yuhanees M. Yusof ◽  
...  
Keyword(s):  
Energy Storage ◽  
Transport Properties ◽  
Polymer Electrolytes ◽  
Circuit Simulation ◽  
Lithium Ion ◽  
Storage Behavior ◽  
Ion Conducting

scholarly journals The Formation of the Solid-/Liquid Electrolyte Interphase (SLEI) on NASICON-Type Glass Ceramics and LiPON

2020 ◽  
Author(s):  
Martin R. Busche ◽  
Thomas Leichtweiss ◽  
Carsten Fiedler ◽  
Thomas Drossel ◽  
Matthias Geiss ◽  
...  
Keyword(s):  
Mass Transport ◽  
Photoelectron Spectroscopy ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Liquid Electrolyte ◽  
Lithium Aluminum ◽  
Ion Conductor ◽  
Nasicon Type ◽  
Ion Conducting ◽  
Solid Liquid

Most electrochemical energy storages (battery cells) consist of solid electrodes separated by a liquid electrolyte (LE). If electrode materials are – at least partially – soluble in the electrolyte, detrimental mass transport between both electrodes (electrode cross-talk) occurs. The shuttle mechanism in lithium-sulfur batteries or leaching of Mn in high voltage cathode materials are important examples. Implementing a solid electrolyte (SE) membrane between the electrodes is a comprehensible approach to suppress undesired mass transport but additional resistances arise due to charge transport across the SE and charge transfer through the solid/liquid electrolyte interfaces. The latter contribution is often overlooked as its determination is challenging, however, these interface properties are crucial for practical application. In previous work a resistive solid-/liquid-electrolyte interphase “SLEI” was found at the interface between the SE lithium aluminum germanium phosphate (LAGP) in contact with a liquid ether-based electrolyte. Here we aim for deeper insight into this interphase formation, referring to a lithium ion conducting glass ceramic (NASICON-type) and the commonly used thin film ion conductor “LiPON” (lithium phosphorous oxide nitride). The growth of the SLEI is monitored by a combination of electrochemical characterization, XPS (x-ray photoelectron spectroscopy) and time-of flight secondary ion mass spectrometry (ToF-SIMS).

scholarly journals The Formation of the Solid-/Liquid Electrolyte Interphase (SLEI) on NASICON-Type Glass Ceramics and LiPON

2020 ◽  
Author(s):  
Martin R. Busche ◽  
Thomas Leichtweiss ◽  
Carsten Fiedler ◽  
Thomas Drossel ◽  
Matthias Geiss ◽  
...  
Keyword(s):  
Mass Transport ◽  
Photoelectron Spectroscopy ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Liquid Electrolyte ◽  
Lithium Aluminum ◽  
Ion Conductor ◽  
Nasicon Type ◽  
Ion Conducting ◽  
Solid Liquid

Most electrochemical energy storages (battery cells) consist of solid electrodes separated by a liquid electrolyte (LE). If electrode materials are – at least partially – soluble in the electrolyte, detrimental mass transport between both electrodes (electrode cross-talk) occurs. The shuttle mechanism in lithium-sulfur batteries or leaching of Mn in high voltage cathode materials are important examples. Implementing a solid electrolyte (SE) membrane between the electrodes is a comprehensible approach to suppress undesired mass transport but additional resistances arise due to charge transport across the SE and charge transfer through the solid/liquid electrolyte interfaces. The latter contribution is often overlooked as its determination is challenging, however, these interface properties are crucial for practical application. In previous work a resistive solid-/liquid-electrolyte interphase “SLEI” was found at the interface between the SE lithium aluminum germanium phosphate (LAGP) in contact with a liquid ether-based electrolyte. Here we aim for deeper insight into this interphase formation, referring to a lithium ion conducting glass ceramic (NASICON-type) and the commonly used thin film ion conductor “LiPON” (lithium phosphorous oxide nitride). The growth of the SLEI is monitored by a combination of electrochemical characterization, XPS (x-ray photoelectron spectroscopy) and time-of flight secondary ion mass spectrometry (ToF-SIMS).

Atomic Layer Deposition of LiF and Lithium Ion Conducting (AlF3)(LiF)x Alloys Using Trimethylaluminum, Lithium Hexamethyldisilazide and Hydrogen Fluoride

2017 ◽  
Author(s):  
Younghee Lee ◽  
Daniela M. Piper ◽  
Andrew S. Cavanagh ◽  
Matthias J. Young ◽  
Se-Hee Lee ◽  
...  
Keyword(s):  
Lithium Ion ◽  
Atomic Layer ◽  
Mass Gain ◽  
Alloy Film ◽  
Ex Situ ◽  
X Ray ◽  
Layer Deposition ◽  
Ion Conducting ◽  
Good Agreement

<div>Atomic layer deposition (ALD) of LiF and lithium ion conducting (AlF<sub>3</sub>)(LiF)<sub>x</sub> alloys was developed using trimethylaluminum, lithium hexamethyldisilazide (LiHMDS) and hydrogen fluoride derived from HF-pyridine solution. ALD of LiF was studied using in situ quartz crystal microbalance (QCM) and in situ quadrupole mass spectrometer (QMS) at reaction temperatures between 125°C and 250°C. A mass gain per cycle of 12 ng/(cm<sup>2</sup> cycle) was obtained from QCM measurements at 150°C and decreased at higher temperatures. QMS detected FSi(CH<sub>3</sub>)<sub>3</sub> as a reaction byproduct instead of HMDS at 150°C. LiF ALD showed self-limiting behavior. Ex situ measurements using X-ray reflectivity (XRR) and spectroscopic ellipsometry (SE) showed a growth rate of 0.5-0.6 Å/cycle, in good agreement with the in situ QCM measurements.</div><div>ALD of lithium ion conducting (AlF3)(LiF)x alloys was also demonstrated using in situ QCM and in situ QMS at reaction temperatures at 150°C A mass gain per sequence of 22 ng/(cm<sup>2</sup> cycle) was obtained from QCM measurements at 150°C. Ex situ measurements using XRR and SE showed a linear growth rate of 0.9 Å/sequence, in good agreement with the in situ QCM measurements. Stoichiometry between AlF<sub>3</sub> and LiF by QCM experiment was calculated to 1:2.8. XPS showed LiF film consist of lithium and fluorine. XPS also showed (AlF<sub>3</sub>)(LiF)x alloy consists of aluminum, lithium and fluorine. Carbon, oxygen, and nitrogen impurities were both below the detection limit of XPS. Grazing incidence X-ray diffraction (GIXRD) observed that LiF and (AlF<sub>3</sub>)(LiF)<sub>x</sub> alloy film have crystalline structures. Inductively coupled plasma mass spectrometry (ICP-MS) and ionic chromatography revealed atomic ratio of Li:F=1:1.1 and Al:Li:F=1:2.7: 5.4 for (AlF<sub>3</sub>)(LiF)<sub>x</sub> alloy film. These atomic ratios were consistent with the calculation from QCM experiments. Finally, lithium ion conductivity (AlF<sub>3</sub>)(LiF)<sub>x</sub> alloy film was measured as σ = 7.5 × 10<sup>-6</sup> S/cm.</div>

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