β All-Solid-State Battery Value Chain
EcoPro BM (KOSDAQ: 247540): Solid Electrolyte & Cathode Materials
EcoPro BM is a South Korean solid electrolyte company and cathode materials maker that built its name on high-nickel EV cathodes β and is now developing the sulfide electrolyte and matched cathode pair it thinks will win the solid-state battery supply chain.
Who they are
EcoPro BM was spun out of the EcoPro Group in May 2016 and grew fast β it became the first company in the world to commercialize a high-nickel (80%+ nickel) cathode material for EV batteries, back in 2018. Ten years into its life as of 2026, it now runs cathode plants in Cheongju and Pohang, plus a Hungarian plant in Debrecen serving European battery makers. It swung to a loss in 2024 during the broader EV "chasm" slowdown, then returned to profit in 2025.
What they do
The core business is cathode materials β the powder that makes up the positive electrode in a lithium-ion battery β sold mainly to Korea's big three battery makers and their EV customers. On the solid-state side, EcoPro BM isn't just chasing a sulfide electrolyte on its own: it's developing the electrolyte and a matched cathode material together, engineered so the two interfaces are chemically compatible from the start, rather than bolting a generic cathode onto someone else's electrolyte later.
How they make money
Cathode material sales, priced largely off nickel and other raw material costs passed through to battery-maker customers β a business that's sensitive to EV demand cycles and metal prices, which is exactly what drove the 2024 loss and 2025 recovery. The solid-state electrolyte and matched-cathode business is still pre-revenue: EcoPro BM says it's in sample-qualification talks with battery customers now, with 2027 as its earliest realistic mass-production window.
Where it sits in the value chain
EcoPro BM sits in Stage 1 β Solid Electrolyte Materials. It's been developing a sulfide-based solid electrolyte process for about four years and currently runs a 40 t/yr pilot plant, alongside R&D on a cobalt-free manganese-rich (LMR) cathode, a sodium-ion cathode, and a high-capacity silicon anode β though none of those three are named, contracted products yet.
The bigger trend
EcoPro BM's pitch is that it isn't just another electrolyte startup β it can offer battery makers a matched electrolyte-plus-cathode "package," built on the same high-nickel cathode expertise it already sells at commercial scale. The company says its powder-control and quality-control technology in sulfide electrolyte is now ahead of Japanese rivals, which β if it holds up under independent scrutiny β would be a notable reversal in a field Japan has historically led on materials chemistry.
What to watch
- Whether "in talks with leading customers" on sample production actually converts into a named supply contract before 2027.
- Whether the silicon anode R&D EcoPro BM has mentioned ever becomes a distinct, revenue-generating product β that would make it one of the first named companies in this chain's Stage 2 (Anode Materials), which currently has none.
- How the core cathode business (nickel-price-sensitive, EV-demand-sensitive) performs alongside the pre-revenue solid-state bet β the two have very different risk profiles.
Related companies
FAQ
Is EcoPro BM mainly a solid-state battery company?
No β its core, revenue-generating business is high-nickel cathode materials for conventional lithium-ion EV batteries. Solid electrolyte and matched cathode development for all-solid-state batteries is a newer, still pre-revenue growth bet on top of that core business.
What makes EcoPro BM's approach to solid electrolytes different?
Rather than developing a solid electrolyte alone, EcoPro BM develops the electrolyte and a cathode material optimized for that specific electrolyte's interface at the same time β aiming to solve the cathode-electrolyte interface resistance problem that's one of the harder technical barriers in sulfide-based solid-state cells.
When does EcoPro BM expect to mass-produce solid electrolyte materials?
The company has pointed to 2027 as its earliest realistic mass-production window, contingent on completing sample qualification with battery-maker customers. It says its production line design is already finished so it can begin construction as soon as customer demand is confirmed.