A room-temperature refuelable lithium, iodine and air battery

Area of Science:

• Electrochemistry
• Materials Science
• Energy Storage

Background:

• Conventional rechargeable lithium batteries face limitations in recharging speed and safety.
• Development of alternative lithium-based energy storage systems is crucial for advancing battery technology.
• Liquid electrolytes offer potential for novel battery designs and functionalities.

Purpose of the Study:

• To demonstrate a new refuelable lithium cell utilizing lithium solvated electron solution (Li-SES) and iodine.
• To investigate the electrochemical properties and safety features of the Li-SES/I2 cell.
• To explore the potential for an indirect lithium-air cell configuration.

Main Methods:

• Fabrication of a lithium cell with Li-SES as anolyte and iodine solution as catholyte.
• Measurement of open-circuit voltage (OCV) and electrochemical performance.
• Confirmation of Li-SES and iodine generation during charging using UV-VIS spectroscopy and qualitative tests.
• Proof-of-concept testing of an indirect lithium-air cell.

Main Results:

• The Li-SES/I2 cell exhibits a high open-circuit voltage (OCV) of approximately 3 V.
• The cell can be rapidly refueled within minutes by replacing spent liquid electrolytes.
• Cells can be safely prepared in a fully discharged state (~0 V OCV) for handling and storage.
• Electrochemical generation of Li-SES and iodine during charge was confirmed.

Conclusions:

• The developed refuelable lithium cell offers a promising alternative to conventional rechargeable batteries.
• Rapid refueling capability and enhanced safety through dischargeable states are key advantages.
• The Li-SES/I2 system demonstrates potential for future energy storage applications, including indirect lithium-air cells.