How is lithium used in lightweight batteries and metal alloys?

Lithium is highly valued in technology and industry due to its light weight and large negative electrochemical potential.1

Lithium in Batteries

Lithium metal serves as the anode in many nonrechargeable primary batteries. Because of its high chemical activity, these batteries utilize nonaqueous electrolytes to achieve high energy and power density.12

• Rechargeable Systems: Since the early 1990s, research has focused on high-power rechargeable lithium batteries for electric vehicles and power storage, often using cathodes like ${\text{LiCoO}}_2$. Smaller versions are widely used in devices such as cell phones and cameras.12
• Specialized Applications: Various lithium-based systems, such as lithium-thionyl chloride and lithium-sulfur dioxide batteries, are employed in aerospace, military equipment, and emergency power units due to their ability to function in extreme temperatures.2

Metal Alloys

In metallurgy, lithium is used to create lightweight and durable structural materials.1
* Lithium-Magnesium Alloys: These are prized for their light weight in aerospace and other industrial applications.1
* Lithium-Aluminum Alloys: These are tougher and harder than aluminum alone, making them suitable for demanding structural uses.1