Anode-Free Li Metal Batteries: Feasibility Analysis and Practical Strategy

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Anode-free lithium metal batteries (AFLMBs) offer theoretical maximum energy density.
• Current AFLMBs suffer from low plating-stripping efficiency, volume changes, and lithium dendrite growth, impacting lifespan and safety.

Purpose of the Study:

• To provide a comprehensive overview and analysis of recent advancements in AFLMBs.
• To critically evaluate the feasibility and practical application value of AFLMBs.
• To present strategies for overcoming key challenges in AFLMBs.

Main Methods:

• Categorization of lithium deposition into heterogeneous and homogeneous interface stages.
• Discussion of key test models, evaluation parameters, and advanced characterization techniques.
• Analysis of practical strategies for battery components (current collector, electrolytes, cathode, etc.).

Main Results:

• Lithium deposition behavior is understood in two distinct stages.
• Various strategies are presented to address challenges like lithium loss, crosstalk, and volume changes.
• Progress in electrode structure, characterization, and performance is reviewed.

Conclusions:

• AFLMBs hold significant potential for high-performance energy storage.
• Overcoming current limitations through component optimization and cycling protocols is crucial.
• Further research is needed to unlock the full application prospects of AFLMBs.