Lithium is used in batteries, medicine, aerospace manufacturing, air purification systems, industrial lubricants, nuclear energy, and ceramics. Batteries dominate global lithium consumption at 87%, according to the U.S. Geological Survey, with all other uses sharing the remaining 13%. The element’s unique properties, including its extreme lightness and high electrochemical potential, make it valuable across a surprisingly wide range of industries.
Batteries and Electric Vehicles
The overwhelming majority of lithium produced today goes into rechargeable batteries. Lithium-ion batteries power cellphones, laptops, tablets, and nearly every portable electronic device on the market. The same technology scales up to power electric vehicles like the Tesla Model S, plug-in hybrids like the Chevrolet Volt, and industrial energy storage systems.
Inside a lithium-ion battery, lithium atoms shuttle between two electrodes as the battery charges and discharges. The negative electrode is typically made of graphite, while the positive electrode uses one of several lithium-containing compounds. Different formulations offer different tradeoffs. Cobalt-based designs deliver high energy density for small electronics. Iron phosphate versions are safer and more stable, making them popular in larger applications like vehicles and grid storage. Manganese-based designs offer strong performance with fewer environmental concerns. The rapid growth of electric vehicles and renewable energy storage is driving lithium demand to historic levels, which is why lithium is sometimes called “white gold.”
Mental Health Treatment
Lithium carbonate is the first-choice medication for preventing mood episodes in bipolar disorder, recommended by every major clinical guideline. It has strong effectiveness against mania and moderate effectiveness against depressive episodes. Doctors have prescribed lithium for mood disorders since the mid-20th century, making it one of the oldest psychiatric medications still in frontline use.
Beyond bipolar disorder, lithium is used as an add-on treatment when antidepressants alone aren’t working for major depression. After two antidepressants have failed, guidelines recommend adding lithium or another augmentation strategy. A large meta-analysis of 12 clinical trials found that adding lithium roughly doubled the odds of responding to treatment compared to placebo. In patients with treatment-resistant depression specifically, the odds were about three times higher. People with more severe symptoms, a family history of mood disorders, or high suicide risk tend to benefit most from lithium augmentation.
Lithium has an unusually narrow window between a helpful dose and a harmful one. The therapeutic range in blood is 0.5 to 1.2 mmol/L, and levels above 1.6 mmol/L are considered critical. This means anyone taking lithium needs regular blood draws to make sure levels stay in the safe zone, typically checked 8 to 12 hours after the last dose. Before starting lithium, patients undergo thyroid, kidney, and calcium testing, since the drug can affect all three over time.
Aerospace and Lightweight Alloys
Lithium is the lightest metal on the periodic table, and when alloyed with aluminum, it produces materials that are significantly lighter than traditional aluminum-copper alloys while maintaining structural strength. NASA has developed techniques to use these aluminum-lithium alloys for large aerospace structures like rocket fuel tank domes. The weight savings translate directly into fuel savings and increased payload capacity, which matters enormously when every kilogram launched into orbit costs thousands of dollars. These alloys are also used in commercial aircraft frames where reducing weight improves fuel efficiency.
Air Purification in Space and Submarines
Lithium hydroxide absorbs carbon dioxide from enclosed air, which makes it essential for life support in spacecraft and submarines. On the International Space Station, a device called the Contaminant Control Cartridge contains lithium hydroxide that reacts with carbon dioxide to produce lithium carbonate and water. The reaction is reliable, generates only a small amount of heat, and lithium hydroxide can absorb a large amount of CO2 relative to its weight. That high absorption-to-weight ratio is exactly what you need when every gram of cargo matters. This same chemistry has been used in submarines, space capsules, and emergency breathing systems for decades.
Industrial Lubricants
About 2% of global lithium goes into lubricating greases. Lithium-based greases, made with a compound called lithium stearate, are the most widely used multipurpose greases in the world. They work across a broad temperature range, resist water washout, and maintain stability under heavy mechanical loads. You’ll find them in automotive wheel bearings, marine equipment, industrial machinery, and aerospace components. Their combination of water resistance and thermal stability makes them particularly valuable in humid or high-moisture environments where other greases would break down.
Nuclear Energy and Fusion Research
Lithium plays a specialized but important role in nuclear technology. The isotope lithium-6 reacts with neutrons to produce tritium, a form of hydrogen used in nuclear weapons and, more recently, in fusion energy research. Interest in this reaction dates back to the Manhattan Project in the 1940s, when scientists first discovered how to enhance tritium production using lithium-6.
Today, lithium is a key material in experimental fusion reactor designs. In a working fusion reactor, a lithium blanket surrounding the reactor core would absorb neutrons and breed tritium continuously, creating a self-sustaining fuel cycle. Both lithium-6 and the more common lithium-7 isotope are useful, though lithium-6 is more efficient for tritium production and more expensive to isolate.
Ceramics, Glass, and Other Uses
Ceramics and glass manufacturing account for about 4% of global lithium consumption. Adding lithium compounds to glass and ceramic formulas lowers melting temperatures, reduces energy costs, and improves the thermal resistance of the finished product. Lithium-enhanced glass appears in heat-resistant cookware, glass-ceramic cooktops, and specialty industrial glass. The remaining 4% of lithium use spans continuous casting in steel production, polymer manufacturing, and various chemical processes where lithium compounds serve as catalysts or reagents.