Ionic Liquid Electrolytes for Electrochemical Energy Storage Devices

Area of Science:

• Electrochemistry and Materials Science

Background:

• Electrochemical energy storage device development relies on advancements in electrolytes and electrodes.
• The interface between electrodes and electrolytes is critical for device performance and safety.
• Ion and electron arrangements at this interface dictate energy storage capacity and stability.

Purpose of the Study:

• To review the physicochemical and electrochemical properties of lithium-ion batteries and supercapacitors utilizing ionic liquids (ILs) as electrolytes.
• To introduce novel energy storage devices developed with ILs over the past decade.

Main Methods:

• Literature review of scientific publications on ionic liquids in energy storage.
• Analysis of physicochemical properties of ILs relevant to electrochemical applications.
• Evaluation of electrochemical performance data for IL-based batteries and supercapacitors.

Main Results:

• Ionic liquids offer tunable properties beneficial for electrode-electrolyte interfaces.
• ILs can improve the safety and energy density of lithium-ion batteries and supercapacitors.
• Recent developments showcase diverse IL-based electrolytes tailored for specific energy storage applications.

Conclusions:

• The synergistic development of electrodes and electrolytes, particularly with ILs, is key to advancing energy storage technology.
• Ionic liquids represent a promising class of electrolytes for next-generation high-performance and safe electrochemical energy storage devices.
• Continued research into ILs will likely lead to further innovations in batteries and supercapacitors.