Cell Design and Materials: Li-Ion

Lithium Metal Anode Basic Technology and Information LI METAL - SWOT ANALYSIS

Strengths

Weaknesses

Opportunities

Threats

Demand for high energy density batteries

Competition from other technologies (NMC/silicon batteries) and next gen chemistries such as metal-air or lithium sulfur

High energy density

Limited cycle life

Lightweight

Low Coulombic efficiency

Aerospace

Difficulty fast-charging

High-end automotive

Large volume changes

Defense-related applications (drones)

Enables other advanced battery chemistries, such as solid-state and lithium-sulfur

Manufacturability of lithium metal Safety (dendrite formation and high reactivity)

Source: L. Yang et al., J Electrochem Soc, 2024., K. Hatzell et al., Joule, 2024.

Advancements in solid-state technology

Safety regulations Increasing lithium costs and supply chain concerns

Lithium metal anodes offer extremely high energy density due to lithium's low weight and high theoretical capacity. However lithium metal technology faces major challenges, primarily related to safety, cycle life, and manufacturability. Lithium metal anodes are prone to dendrite formation during charging, which can cause short circuits, thermal runaway, and fires. Additionally, lithium’s high reactivity with electrolytes can reduce cycle life and efficiency. Compared to traditional graphite anodes, lithium metal anodes can theoretically delivery much higher capacity but are significantly less stable and more challenging to commercialize. Compared to silicon anodes, lithium metal offers higher capacity but lags in safety and durability. In contrast to lithium-sulfur batteries, which may use lithium metal anodes, lithium metal batteries share similar safety concerns but can provide lower production costs and weight advantages. Many companies are working to mitigate the safety challenges inherent to lithium metal anodes, using techniques such as solid state electrolytes, high-concentration liquid electrolytes, protective coatings, and separator designs that suppress dendrites.

Extracted from the PDF; charts and images may read imperfectly.