NEO Battery Materials, a developer of silicon anode materials for lithium-ion batteries, announced that its latest prototype, P-300N, has exceeded initial performance targets during long-term capacity testing. The company also shared updates on leadership and large-scale development plans.
NEO’s P-300N High-Stability Variant, introduced in early 2025, demonstrated more than 90% capacity retention after 300 charge-discharge cycles in coin full-cell format.
The company had initially been targeting 80% retention at that cycle count. The material uses metallurgical-grade silicon (MG-Si), a low-cost silicon input that is increasingly explored for lithium-ion battery applications.
The performance results support continued development for larger battery formats commonly used in electric vehicles (EVs) and energy storage systems.
Next-phase development
To lead testing and production scale-up, Dr. Jun Sik Jeoung has joined NEO full-time as senior VP of Commercialization & Cell Development. Jeoung has over 17 years of battery experience, including prior roles at Samsung SDI and in the automotive sector, where he worked on silicon anode materials for large-format EV batteries.
The engineering team has initiated the design of single-layer pouch cells and plans to conduct performance testing beyond 500 cycles. These cells will help evaluate interactions between the P-300N material, graphite blends, and various cathode chemistries relevant to EV and mobility battery configurations.
NEO is in discussions with battery prototyping firms and manufacturers in South Korea, the US, and Germany to support multi-layer pouch cell development. Due to specialized equipment requirements, some aspects of manufacturing will be outsourced.
At its R&D Scale-Up Centre, the company has completed installation of post-treatment equipment and is adding new machinery to increase process control and throughput.
These upgrades are intended to improve the quality and consistency of MG-Si processing in anticipation of growing evaluation requests from downstream partners in the EV battery supply chain.
Filed Under: Batteries, Technology News