Antimony-based liquid metal batteries the future of energy storage?
The widespread implementation of batteries featuring molten metal electrodes and salt solution electrolyte is anticipated to commence next year. The pioneering technology originates from the startup Ambri, which plans to introduce a system with a capacity of 300 kWh in Aurora, Colorado. This innovation holds the potential to revolutionize energy storage solutions.
The emerging technology offers distinct advantages over traditional lithium-ion batteries. Notably, it presents a more cost-effective solution. Furthermore, the startup’s innovation is characterized by its straightforward construction and remarkable durability, with the ability to maintain 95% of its capacity over a span of two decades.
The role of antimony in the production of new batteries
Antimony is an elemental substance represented by the symbol Sb and has an atomic number of 51. Its distinctive shiny appearance is complemented by its primary occurrence in nature as a sulfide mineral referred to as stibnite (Sb2S3).
China holds a significant position in antimony production, largely due to the extensive Xikuangshan mine situated in Hunan. From an industrial perspective, antimony assumes a crucial role in enhancing the characteristics of lead-tin alloys. These improved properties find applications in diverse fields, including the production of items like bullets and bearings.
Furthermore, antimony serves to reinforce the lead alloy plates within lead-acid batteries and is a fundamental component of flame retardants, enhancing their fire-resistant properties. Additionally, this element has gained significance as a vital component in liquid metal batteries, contributing to their functionality and performance.
Nonetheless, concerns are rising regarding the availability of antimony. The ambitious endeavors of companies like Ambri could potentially face obstacles due to inadequate supplies of this element. Adding to the complexity, antimony finds itself among a list of fourteen minerals labeled as “critical” by governments in the US, Canada, Australia, UK, and Europe. This recognition underscores the urgent need to address potential shortages and ensure a sustainable supply of this essential mineral.
Big potential
A group of researchers at MIT has emphasized the crucial role of cost in effectively storing renewable energy. Their analysis underscores that in order to fully unlock the capabilities of wind and solar energy, the expenses associated with energy storage must decrease substantially to reach a target of $20 per kilowatt hour. This cost reduction is seen as pivotal for enabling widespread adoption of renewable energy sources and achieving their maximum potential.
Presently, the cost of the Ambri product significantly exceeds the mentioned targets, spanning from USD 180/kWh to USD 250/kWh. However, the technology’s developers express a strong belief that this cost is poised to decline remarkably, potentially reaching approximately $21/kWh by the year 2030. This projection suggests a substantial reduction, making the technology considerably more accessible and aligned with the aspirations for efficient energy storage.