Sunrise New Energy Subsidiary Publishes Patent Titled "Spherical Hard Carbon Composite Material and Its Preparation Method"

Sunrise New Energy Co., Ltd. ("Sunrise", the "Company", "we" or "our") (NASDAQ:EPOW) today announced that its subsidiary, Sunrise (Guizhou) New Energy Materials Co., Ltd., has published a patent titled "Spherical Hard Carbon Composite Material and Its Preparation Method", with the patent number CN2025106204848. The invention targets hard carbon composite anode materials used in low-temperature energy storage batteries, particularly sodium-ion batteries, and is expected to provide more efficient and reliable material solutions for large-scale energy storage systems as well as commuter and remote-area power infrastructure.

The technology addresses common challenges of traditional hard carbon anode materials—such as reduced efficiency, limited cycle life, and capacity degradation under low-temperature and high-rate charge/discharge conditions—by designing a spherical hard carbon composite structure, optimizing the carbon framework and conductive/ionic pathways, and improving surface and interfacial treatments. These innovations aim to enhance low-temperature conductivity, ion diffusion efficiency, and structural stability, enabling superior capacity retention, high-rate performance, and cycling durability in sodium-ion and broader energy storage battery applications.