A New Challenger to Lithium-Ion? TaiSan Secures £4.7M Funding to Scale Sodium Batteries

Lithium-ion batteries have powered everything from smartphones to electric vehicles for years, but one UK startup believes there's a better alternative waiting in the wings. TaiSan, a battery technology startup, has raised £4.65 million in funding co-led by Eos Advisory  and the Midlands Engine Investment Fund II through Mercia Ventures  to accelerate the development of its solid-state sodium-ion batteries. I've always found battery technology fascinating because it's one of those innovations that quietly shapes our everyday lives, even if we rarely think about it.

What really caught my attention is TaiSan's focus on sodium instead of lithium. Since sodium is far more abundant, it has the potential to reduce costs while easing some of the supply chain pressures that have affected battery manufacturers in recent years. If the company can deliver on its claims, it could make advanced batteries more accessible and not just for large manufacturers, but also for startups building the next generation of electric products. Sometimes the biggest innovations aren't entirely new; they're about improving the technology we've relied on for years.

TaiSan says its batteries are lighter, more compact, and safer than today's sodium-ion and lithium-ion alternatives. By replacing the flammable liquid electrolyte used in conventional batteries with a proprietary solid-state version, the company aims to improve both safety and battery life. Those are the kinds of improvements that could make sodium-ion a much more practical option for everyday applications.

The funding round also attracted support from AFI Ventures, EverQuest Capital Partners, Adeline Arts & Science, Techmind, angel investor François Badelon, existing investors, and £700,000 in grant funding from Innovate UK. Founder Sanzhar Taizhan, formerly a research electrochemist at Jaguar Land Rover and The Faraday Institution, plans to expand the company's Cambridge laboratory, establish manufacturing operations in Coventry, and begin pilot testing with leading manufacturers.

One thing I keep wondering, though, is whether sodium-ion batteries can match lithium-ion once they're produced at scale. Promising lab results is one thing, but convincing manufacturers to change technologies is a completely different challenge. If TaiSan can prove that its batteries deliver the performance, reliability, and cost savings it's aiming for, this funding round could mark the beginning of a much bigger shift in the battery industry.

💬 Join Our Startup WhatsApp Community

Don't build your business alone. Join thousands of founders, entrepreneurs, and startup professionals sharing funding opportunities, industry news, events, partnerships, and practical advice every day.

👉 Join the community today and stay connected with the startup ecosystem.

If sodium-ion batteries deliver on their promise, which industry do you think will be disrupted first and why?