Coupled Cation–Anion Dynamics Enhances Cation Mobility in Room-Temperature Superionic Solid-State Electrolytes

2019 ◽  
Vol 141 (49) ◽  
pp. 19360-19372 ◽  
Author(s):  
Zhizhen Zhang ◽  
Pierre-Nicholas Roy ◽  
Hui Li ◽  
Maxim Avdeev ◽  
Linda F Nazar
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Cation Mobility ◽  
Solid State Electrolytes

scholarly journals Modification of Lithium Metal Anode and Solid-State Electrolyte Interface with a Gel Electrolyte

2020 ◽  
Author(s):  
Lawrence Renna ◽  
Francois-Guillame Blanc ◽  
Vincent Giordani
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Gel Polymer Electrolyte ◽  
High Energy ◽  
Gel Electrolyte ◽  
High Energy Density ◽  
Interfacial Resistance ◽  
Metal Anode ◽  
Solid State Electrolytes ◽  
Metal Anodes

Solid-state electrolytes are continually being explored for Li-ion batteries due to their enhanced safety and their enabling of high energy density active materials, particularly Li metal anodes. However, the interface between solid-state electrolytes and Li metal anodes are prone to high impedance due to poor contact, limiting their applicability. Introducing a thin gel polymer electrolyte interlayer to conformally coat solid electrolytes can improve the interfacial contact of Li metal anode and thus reduce the interfacial resistance. Here we used a plasticized poly(ethylene oxide)-based electrolyte with high concentrations of bis(trifluoromethane)sulfonamide lithium (LiTFSI) that show 100% amorphous character. These electrolytes show Li+ conductivity as high as σ = 2.9×10-4 S/cm at room temperature. We discovered by thermogravimetric analysis (TGA) with off-gas analysis in conjunction with nuclear magnetic resonance (NMR) spectroscopy that the electrolyte films had absorbed N-methyl-2-pyrrolidone (NMP) vapors to form a gel electrolyte. We incorporated the gel electrolyte as an interfacial modification layer between LLZO and Li metal electrodes and found a 58 times reduction in the area specific resistance (ASR) at room temperature.

Synthesis and properties of poly(1,3-dioxolane) in-situ quasi-solid-state electrolytes via rare-earth triflate catalyst

2021 ◽  
Author(s):  
Guuanming Yang ◽  
Yanfang Zhai ◽  
Jianyao Yao ◽  
Shufeng Song ◽  
Liyang Lin ◽  
...  
Keyword(s):  
Rare Earth ◽  
Solid State ◽  
Ionic Conductivity ◽  
Ring Opening ◽  
Room Temperature ◽  
Ring Opening Polymerization ◽  
Solid State Electrolytes

We report rare-earth triflate catalyst Sc(OTf)3 for ring-opening polymerization of 1,3-dioxolane in-situ producing quasi-solid-state poly(1,3-dioxolane) electrolyte, which not only demonstrates superior ionic conductivity of 1.07 mS cm-1 at room temperature,...

Investigation of an Ionic Liquid As a High-Temperature Electrolyte for Silicon-Lithium Systems

2020 ◽  
Author(s):  
Christopher Rudolf ◽  
Corey Love ◽  
Marriner Merrill
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Solid State ◽  
High Temperatures ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Lithium Ion ◽  
Constant Current ◽  
Wide Range ◽  
Solid State Electrolytes

Abstract Electrolytes for lithium ion batteries which work over a wide range of temperatures are of interest in both research and applications. Unfortunately, most traditional electrolytes are unstable at high temperatures. As an alternative, solid state electrolytes are sometimes used. These are inherently safer because they have no flammable vapors, and solid state electrolytes can operate at high temperatures, but they typically suffer from very low conductivity at room temperatures. Therefore, they have had limited use. Another option which has been previously explored is the use of ionic liquids. Ionic liquids are liquid salts, with nominally zero vapor pressure. Many are liquid over the temperature of interest (20–200°C). And, there is a tremendous range of available chemistries that can be incorporated into ionic liquids. So, ionic liquids with chemistries that are compatible with lithium ion systems have been developed and demonstrated experimentally at room temperature. In this study, we examined a silicon-lithium battery cycling at room temperature and over 150°C. Using half-cell vial and split-cell structures, we examined a standard electrolyte (LiPF6) at room temperature, and an ionic liquid electrolyte (1-ethyl-3-methylimidazolium bis(trifluorosulfonyl)imide) at room temperature and up to ∼150°C. The ionic liquid used was a nominally high purity product purchased from Sigma Aldrich. It was selected based on results reported in the open literature. The anode used was a wafer of silicon, and the cathode used was an alumina-coated lithium chip. The cells were cycled either 1 or 5 times (charge/discharge) in an argon environment at constant current of 50 μA between 1.5 and 0.05 volts. The results for the study showed that at room temperature, we could successfully cycle with both the standard electrolyte and the lithium ion electrolyte. As expected, there was large-scale fracture of the silicon wafer with the extent of cracking having some correlation with first cycle time. We were unable to identify any electrolyte-specific change in the electrochemical behavior between the standard electrolyte and the ionic liquid at room temperature. Although the ionic liquid was successfully used at room temperature, when the temperature was increased, it behaved very differently and no cells were able to successfully cycle. Video observations during cycling (∼1 day) showed that flocs or debris were forming in the ionic liquid and collecting on the electrode surface. The ionic liquid also discolored during the test. Various mechanisms were considered for this behavior, and preliminary tests will be presented. All materials were stable at room temperature, and the degradation appeared to be linked to the electrochemical process. As a conclusion, our working hypothesis is that, particularly at elevated temperatures, ionic liquid cleanliness and purity can be far more important than at room temperature, and small impurities can cause significant hurdles. This creates an important barrier to research efforts, because the “same” ionic liquids could cause failure in one situation and not in another due to impurities.

Functional polyethylene glycol based solid electrolytes with enhanced interfacial compatibility for room-temperature lithium metal batteries

2021 ◽  
Author(s):  
Yuhang Zhang ◽  
Shimou Chen ◽  
Yong Chen ◽  
Lingdong Li
Keyword(s):  
Polyethylene Glycol ◽  
Solid State ◽  
Solid Electrolytes ◽  
Room Temperature ◽  
In Situ Polymerization ◽  
Lithium Metal ◽  
Lithium Metal Batteries ◽  
Interfacial Compatibility ◽  
Solid State Electrolytes

The interface issues of electrodes/solid-state electrolytes have been limiting the application for room-temperature lithium metal batteries. In-situ polymerization technology achieved the establishment of solid-solid ultra-conformal interface contacts. However, few considerations...

scholarly journals Recent progress and future prospects of atomic layer deposition to prepare/modify solid-state electrolytes and interfaces between electrodes for next-generation lithium batteries

2021 ◽  
Author(s):  
Lu Han ◽  
Chien-Te Hsieh ◽  
Bikash Chandra Mallick ◽  
Jianlin Li ◽  
Yasser Ashraf Gandomi
Keyword(s):  
Solid State ◽  
Atomic Layer Deposition ◽  
Lithium Batteries ◽  
Room Temperature ◽  
Recent Progress ◽  
Lithium Ion ◽  
Atomic Layer ◽  
Future Prospects ◽  
Layer Deposition ◽  
Solid State Electrolytes

Comparison of ionic conductivity (at room temperature) of different solid-state electrolytes (SSEs) prepared by the atomic layer deposition (ALD) for lithium-ion batteries (LIBs).

scholarly journals Carbon nanohorn-based electrolyte for dye-sensitized solar cells

2015 ◽  
Vol 8 (1) ◽  
pp. 241-246 ◽  
Author(s):  
Fabian Lodermeyer ◽  
Rubén D. Costa ◽  
Rubén Casillas ◽  
Florian T. U. Kohler ◽  
Peter Wasserscheid ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solid State ◽  
Room Temperature ◽  
Dye Sensitized Solar Cells ◽  
Carbon Nanohorns ◽  
Dye Sensitized ◽  
Highly Efficient ◽  
Solid State Electrolytes ◽  
First Time ◽  
Sensitized Solar Cells

For the first time, carbon nanohorns were implemented into solid-state and quasi-solid-state electrolytes for highly efficient DSSCs yielding efficiencies of up to 7.84% at room temperature.

Improved Sol-Gel Materials for Efficient Solid State Dye Lasers

1993 ◽  
Vol 329 ◽  
Author(s):  
Michael Canva ◽  
Patrick Georges ◽  
Jean-Fran^ois Perelgritz ◽  
Alain Brun ◽  
Fréddric Chaput ◽  
...  
Keyword(s):  
Solid State ◽  
Physical Properties ◽  
Room Temperature ◽  
Sol Gel ◽  
Tunable Lasers ◽  
Optical Quality ◽  
Dye Lasers ◽  
Laser Dyes ◽  
Host Matrix ◽  
Host Matrices

AbstractPhotoresistant laser dyes were trapped in silica based xerogel host matrices to obtain solid state tunable lasers. For this purpose very dense xerogel samples with improved chemical and physical properties were prepared at room temperature by the sol-gel technology. The as-prepared materials were polished to obtain optical quality surfaces and were used as new lasing media.Lasing action of such different dyes as rhodamine, perylene and pyrromethene doping dense sol-gel matrices was demonstrated. Efficiencies of 30 % or lifetimes of more than 100,000 shots were achieved with different new ≤dye dopant/host matrix≥ couples. Their different performances are reviewed and discussed.

Imidazole Promoted Efficient Anomerization of β-D-Glucose Pentaacetate in Organic Solutions and Solid State

2019 ◽  
Author(s):  
Meifeng Wang ◽  
Liyin Zhang ◽  
Yiqun Li ◽  
Liuqun Gu
Keyword(s):  
Solid State ◽  
Organic Solvents ◽  
Room Temperature ◽  
Materials Design ◽  
The Future ◽  
Organic Solutions ◽  
Glucose Pentaacetate

<p></p>Anomerization of glycosides were rarely performed under basic condition due to lack of efficiency. Here an imidazole promoted anomerization of β-D-glucose pentaacetate was developed; and reaction could proceed in both organic solvents and solid state at room temperature. Although mechanism is not yet clear, this unprecedent mild anomerization in solid state may open a new promising way for stereoseletive anomerization of broad glucosides and materials design in the future..

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