Dual-component modulation strategy for enhancing interfacial compatibility in 4.6 V LRMO-based solid-state lithium...

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Solid-state lithium metal batteries (LMBs) are promising for next-generation energy storage.
• Li-rich manganese oxide (LRMO) cathodes in LMBs face interfacial compatibility challenges.
• These challenges limit the long-term stability and performance of LRMO-based LMBs.

Purpose of the Study:

• To improve the interfacial compatibility in solid-state LMBs utilizing LRMO cathodes.
• To enhance the stability and electrochemical performance of LRMO-based solid-state batteries.
• To investigate the effect of dual-component modulation on PVC-based gel electrolytes.

Main Methods:

• Dual-component modulation of a PVC-based gel electrolyte.
• Fabrication of solid-state Li|LRMO battery cells.
• Electrochemical characterization including cycling stability and coulombic efficiency measurements.
• Analysis of interfacial properties and interphase formation.

Main Results:

• The optimized electrolyte demonstrated high oxidation stability.
• Dual-component modulation facilitated the formation of inorganic-rich interphases.
• The optimized interface contributed to the long-term stability of the Li|LRMO cells.
• The 4.6 V Li|LRMO cells achieved stable operation for 100 cycles at 0.2C.
• An initial capacity of 215.2 mA h g^-1 and average coulombic efficiency of 99.55% were delivered.

Conclusions:

• Dual-component modulation effectively enhances interfacial compatibility in LRMO-based solid-state LMBs.
• The optimized electrolyte and interphases lead to improved cycling stability and performance.
• This approach offers a viable strategy for developing high-performance solid-state lithium metal batteries.