Co-solvent strategy for rechargeable post-lithium metal batteries

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Lithium-ion batteries face cost challenges due to limited lithium supply.
• Developing rechargeable batteries with abundant post-lithium charge carriers is crucial.
• High reversibility and kinetics in post-lithium metal anodes remain significant hurdles.

Purpose of the Study:

• To review the progress of the co-solvent strategy in post-lithium metal batteries.
• To explore the application of co-solvents for sodium, potassium, magnesium, calcium, zinc, and aluminum batteries.
• To highlight the role of co-solvent coordination in enhancing metal anode performance.

Main Methods:

• Literature review of co-solvent strategies in post-lithium battery electrolytes.
• Analysis of co-solvent coordination with post-lithium charge carriers.
• Discussion of factors influencing electrochemical performance, including solvation and interphase formation.

Main Results:

• Co-solvent addition is a promising strategy to address challenges in post-lithium metal anodes.
• Co-solvent coordination ability correlates with improved solvation structure, de-solvation, and solid electrolyte interphase (SEI) formation.
• The strategy shows potential for various post-lithium systems, including sodium, potassium, magnesium, calcium, zinc, and aluminum.

Conclusions:

• The co-solvent strategy offers a viable pathway for developing high-performance post-lithium metal batteries.
• Understanding co-solvent coordination is key to designing effective electrolytes for sustainable energy storage.
• Further research into effects beyond the solvation sheath is essential for advancing battery technology.