Structural Design and Advanced Diagnostics of Lithium Metal Anodes for High-Energy-Density Batteries

Area of Science:

• Materials Science
• Electrochemistry
• Battery Technology

Background:

• Lithium metal anodes (LMAs) are critical for high-energy-density batteries.
• Their widespread adoption is hindered by lithium dendrite growth and interfacial instability.
• Existing research often focuses on electrolytes and interfaces, necessitating a review of anode-centric strategies.

Purpose of the Study:

• To provide a focused review on structural design and advanced diagnostics for lithium metal anodes.
• To explore strategies for uniform lithium plating, volume change mitigation, and mechanism deciphering.
• To outline challenges and propose an integrated pathway for practical high-energy lithium metal batteries.

Main Methods:

• Review of rational structural design strategies for LMAs, including 3D lithiophilic hosts, gradient current collectors, and composite alloys.
• Analysis of advanced diagnostic techniques, such as multi-scale operando characterization and computational simulations.
• Synthesis of insights from structural innovations and diagnostic applications.

Main Results:

• Structural designs like 3D hosts and gradient collectors guide uniform plating and mitigate volume changes.
• Advanced diagnostics reveal underlying mechanisms of lithium deposition and failure.
• Synergistic integration of structural design and diagnostics is crucial for LMA performance.

Conclusions:

• Rational structural design and advanced diagnostics are indispensable for unlocking the potential of LMAs.
• Addressing challenges like balancing areal capacity with cyclability is vital for practical applications.
• An integrated approach combining structural innovation and multiscale diagnostics offers a pathway to high-energy lithium metal batteries.