Controlling Cell Components to Design High-Voltage All-Solid-State Lithium-Ion Batteries

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• All-solid-state batteries (ASSBs) offer enhanced safety and energy density compared to conventional lithium-ion batteries.
• The use of solid ionic conductors between solid electrode films in ASSBs eliminates dead space, enabling higher voltage packs.
• High-voltage cathode materials are crucial for achieving superior energy storage performance.

Purpose of the Study:

• This review focuses on high-voltage cathode materials with redox peaks beyond 4.7 V.
• It examines solid electrolytes compatible with these high-voltage cathodes, including halide- and sulfide-based systems.
• The review discusses strategies to optimize cell components for improved performance and safety.

Main Methods:

• Review of current literature on high-voltage cathode materials, particularly Li-Ni-Mn-O systems.
• Analysis of compatible solid electrolytes (halide- and sulfide-based) for high-voltage applications.
• Discussion of electrode-electrolyte compatibility at extended potentials and anode thickness control.

Main Results:

• Li-Ni-Mn-O systems show promise as cathode materials for high-voltage cells.
• Compatibility challenges between electrodes and electrolytes at high potentials are identified.
• Anode thickness control is critical for mitigating solid-electrolyte interphase formation and dendrite growth.

Conclusions:

• Optimizing cell components is essential to minimize electrode-electrolyte impedance and enhance ion transport.
• Further research into high-voltage cathode materials and compatible solid electrolytes is needed.
• Advancements in ASSBs are key to developing next-generation energy storage solutions.