Metallurgical antimony applications represent a significant and enduring segment of antimony consumption, with the metal's use as a hardening agent for lead in lead-acid batteries accounting for approximately one-third of global antimony use . The battery materials market is projected to grow from USD 83.95 billion in 2025 to USD 147.93 billion by 2030, at a CAGR of 13.7%, driven by the worldwide shift toward electrification, clean energy, and digital technology . Within this expanding market, the lead-acid battery segment is estimated to hold the second-largest share, due to its widespread use in automotive, industrial backup power, and off-grid energy storage applications .

Metallurgical antimony applications extend beyond batteries to include the production of solder, sheet and pipe metal, ammunition, bearings, castings, and pewter . Antimony is rarely used in pure form due to the metal's tendency to be brittle and flaky; instead, it is most commonly used with other metals to form alloys. The addition of antimony to lead significantly increases hardness and mechanical strength, making the alloy suitable for applications requiring durability and resistance to deformation. The lead-antimony alloy used in battery grids provides the strength needed to support active materials while maintaining the electrical conductivity essential for battery performance.

The lead-acid battery industry remains a crucial market for antimony despite the growth of lithium-ion technology. Lead-acid batteries continue to be preferred for applications requiring high surge currents, low cost, and well-established recycling infrastructure . Ongoing advancements in lead-acid battery design, including improved flooded and absorbed glass mat (AGM) technologies, are driving continued market growth. The well-established recycling ecosystem for lead-acid batteries also contributes to antimony recovery, with the bulk of secondary antimony recovered at lead smelters from end-of-life batteries .

Lead-acid battery materials face evolving market dynamics as the energy storage landscape transforms. The recycling rate for antimony is estimated to account for around 18% of antimony supply in the United States, though global recycling rates vary significantly . The transition toward more sustainable energy systems is creating both challenges and opportunities for the lead-acid battery industry. While lithium-ion batteries gain market share in electric vehicles and grid storage, lead-acid batteries remain essential for applications where cost and reliability are paramount, particularly in developing regions and for industrial backup power.

Antimony features prominently on the critical minerals lists of many countries including Australia, the United States, Canada, Japan, and the European Union . This designation reflects antimony's importance to modern economies and the supply risks associated with its geographic concentration. Globally, the primary production of antimony is now isolated to a few countries and is dominated by China, making it a strategic material for modern society . The antimony market size was projected to reach USD 2.37 billion by 2023, growing at a CAGR of 6.0%, driven by increasing use in the chemical and automotive industries . As the global energy transition accelerates, metallurgical antimony applications and lead-acid battery materials will continue to be essential for powering transportation, industry, and energy storage systems worldwide.