Posco Future M nears silicon anode mass production

May 20, 2026, 08:59 am

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Silicon anode material demo plant. /Posco Future M

Posco Future M has secured mass production technology for silicon anode materials, positioning itself to enter the next-generation battery materials market by 2028. Silicon anodes can store more than four times the energy of conventional graphite-based anodes and offer faster charging speeds, making them a key material for high-performance batteries used in electric vehicles (EVs), robotics, and other advanced mobility sectors.

The company announced on May 20 that it had developed a silicon anode capable of storing more than four times the energy of graphite anodes. Silicon anodes are typically mixed with graphite anodes in batteries, but Posco Future M said its product maintained more than 80% of its initial capacity after 1,000 charge-discharge cycles even when the silicon mixing ratio exceeded 20%.

According to the company, this marks a significant improvement over existing batteries, where the silicon content generally remained in the single-digit percentage range, demonstrating not only higher capacity but also long-term performance stability.

Despite their high energy density, silicon anodes have faced commercialization challenges because silicon expands significantly during charging and discharging. Posco Future M’s research institute said it overcame the issue by applying proprietary silicon nano-processing and carbon composite technologies, substantially reducing expansion and securing commercialization capabilities.

“Silicon anodes are a next-generation core material that will determine battery performance,” said Hong Young-jun, head of the company’s research institute. “Based on our accumulated materials technology and mass production experience, we will provide the best solutions to customers while continuously expanding our global competitiveness.”

The company said it secured mass production technology through product testing and quality verification with major domestic and overseas clients. It plans to begin mass production around 2028 after considering market demand and industry conditions.

Posco Future M expects demand to rise sharply in the premium EV market, where longer driving range and shorter charging times are increasingly important. The company also sees growth potential in emerging sectors such as humanoid robots and urban air mobility (UAM).

The company added that it will continue improving related technologies through cooperation with Factorial, particularly in both cathode and silicon anode materials.

Posco Future M said it plans to strengthen competitiveness and establish a stable supply system through advanced process technologies and productivity improvements in order to capture rapidly growing demand for silicon anode materials.

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