Pseudo-solid-state electrolytes utilizing the ionic liquid family for rechargeable batteries

2021 ◽  
Author(s):  
Jinkwang Hwang ◽  
Kazuhiko Matsumoto ◽  
Chih-Yao Chen ◽  
Rika Hagiwara
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Solid State ◽  
Electrochemical Performance ◽  
Rechargeable Batteries ◽  
Design Strategies ◽  
Solid State Electrolytes

This review summarises the properties and electrochemical performance of pseudo-solid-state electrolytes prepared using ionic liquids, along with insights into design strategies to improve their application in various secondary batteries.

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.

Zirconia-supported solid-state electrolytes for high-safety lithium secondary batteries in a wide temperature range

2017 ◽  
Vol 5 (47) ◽  
pp. 24677-24685 ◽  
Author(s):  
Renjie Chen ◽  
Wenjie Qu ◽  
Ji Qian ◽  
Nan Chen ◽  
Yujuan Dai ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Solid State ◽  
Wide Temperature Range ◽  
Solid State Electrolyte ◽  
Lithium Secondary Batteries ◽  
Temperature Range ◽  
Solid State Electrolytes

We fabricate a high-safety solid-state electrolyte by in situ immobilizing ionic liquids within a nanoporous zirconia-supported matrix.

Polymeric ionic liquids for lithium-based rechargeable batteries

2019 ◽  
Vol 4 (2) ◽  
pp. 294-309 ◽  
Author(s):  
Gebrekidan Gebresilassie Eshetu ◽  
David Mecerreyes ◽  
Maria Forsyth ◽  
Heng Zhang ◽  
Michel Armand
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Rechargeable Batteries ◽  
Promising Alternative ◽  
Polymeric Ionic Liquids

Polymeric ionic liquids containing both ionic liquid-like moieties and polymer frameworks are promising alternative electrolytes/binders for Li-based rechargeable batteries.

The influence of ionic liquid additives on zinc half-cell electrochemical performance in zinc/bromine flow batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (33) ◽  
pp. 27788-27797 ◽  
Author(s):  
Gobinath P. Rajarathnam ◽  
Max E. Easton ◽  
Martin Schneider ◽  
Anthony F. Masters ◽  
Thomas Maschmeyer ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Electrochemical Performance ◽  
Half Cell ◽  
Redox Flow Batteries ◽  
Flow Batteries

Six ionic liquids were assessed for their suitability as alternative bromine-sequestering agents (BSAs) in zinc/bromine redox flow batteries (Zn/Br RFBs)viacomparison against conventional BSA, 1-ethyl-1-methylpyrrolidinium bromide ([C2MPyrr]Br).

scholarly journals Advances in sodium secondary batteries utilizing ionic liquid electrolytes

2019 ◽  
Vol 12 (11) ◽  
pp. 3247-3287 ◽  
Author(s):  
Kazuhiko Matsumoto ◽  
Jinkwang Hwang ◽  
Shubham Kaushik ◽  
Chih-Yao Chen ◽  
Rika Hagiwara
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Electrochemical Performance ◽  
Electrode Materials ◽  
Liquid Electrolytes

This review summarizes the use of ionic liquids in Na secondary batteries and discusses their electrochemical performance with various electrode materials.

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