Lithium Uses: Batteries, Medicine, Industry & Future Energy

Lithium (Li, atomic number 3) is the lightest metal and a critical element for modern technology and medicine.

1. Batteries (Dominant Use)

Lithium-ion batteries power smartphones, laptops, EVs, grid storage, power tools, medical devices. High energy density, low self-discharge, long cycle life. LiFePO₄ (LFP) for safety/longevity; NMC/NCA for energy density.

2. Medicine

• Lithium carbonate/citrate: Gold-standard mood stabilizer for bipolar disorder (mania prophylaxis, depression adjunct). Narrow therapeutic index (0.6–1.0 mmol/L); requires monitoring (renal, thyroid, electrolytes).
• Investigational: Neuroprotection in ALS, Alzheimer's, TBI; antiviral.

3. Glass & Ceramics

Lithium carbonate lowers melting point, reduces thermal expansion (Pyroceram, CorningWare), improves glaze durability and brilliance.

4. Lubricants

Lithium stearate/greases: high-temperature, water-resistant, mechanical stability. Automotive, industrial, aerospace.

5. Polymer Production

Organolithium compounds (n-BuLi) initiate anionic polymerization → synthetic rubbers (SBR, polybutadiene), block copolymers (SBS), plastics.

6. Nuclear Fusion (Future)

Lithium-6 breeds tritium (³H) via neutron capture: ⁶Li + n → ⁴He + ³H. Tritium + deuterium = fusion fuel. Also liquid lithium as plasma-facing component/coolant in tokamaks.

7. Other

Air purification (CO₂ scrubbers in submarines/spacecraft), aluminum smelting (flux), pyrotechnics, hydrogen storage.

Supply note: "White gold" demand soaring with EV transition. Brine (S. America) and hard-rock (Australia) mining; recycling and direct lithium extraction (DLE) scaling.