Canada-based NEO Battery Materials has introduced NBMSiDE P-300N, a mass-producible silicon anode material optimized to enhance battery stability while delivering an average coulombic efficiency (CE) of over 99.8%.
Building on the P-300 silicon anode introduced in January, NEO refined the synthesis process and material characteristics while maintaining low costs and minimizing initial capacity loss.
“The upgraded P-300N incorporates refinements in particle size distribution, shape control and composite layer coating on the silicon particle. The composite layer coating offers enhanced protection against the direct contact of the silicon anode and electrolyte, mitigating capacity loss and improving cycling life,” the company stated. “Additionally, a reinforced polymer coating network aids in mechanical stress dissipation without compromising conductivity between silicon particle structures.”
The company said its priority is optimizing the 50-cycle average CE on the half cell using a 100% pure silicon anode. A high CE over the first 50 cycles is required for and determines high capacity retention in long battery performance tests of over 300, 500 and 1,000 cycles.
The flexibility of NEO’s synthesis method has enabled it to produce two P-300N variations to meet different industry needs. A high-capacity variant demonstrates initial capacity over 2,000 mAh/g and an average CE of over 99.5%, maintaining performance over 50 cycles. A high-stability variant provides a balance of cycle performance and capacity, delivering an average CE of over 99.8% and approximately 2,000 mAh/g in initial capacity.
P-300N is positioned as a low-cost, competitive solution for applications including EVs and energy storage that require high capacity and long-term stability, as well as electronics, power tools or drones and unmanned aerial vehicles that require high capacity with ultra-fast charging and discharging.
The P-300N is undergoing long-term, full cell tests of over 300 cycles. After completing small-scale optimization, NEO plans to manufacture near-commercial battery cells with 3 to 5 Ah capacities in partnership with global players in the battery value chain.
Source: NEO Battery Materials
