Sodium-ion Battery hard carbon is at the center of E-Power Inc.’s latest patent milestone. On May 8, 2026, E-Power Inc. (NASDAQ: EPOW) announced the grant and registration of its patent for “A Phosphorus-Silver-Silicon Co-Doped Hard Carbon Composite Material and Its Preparation Method,” Patent No. CN2023105784527. This patent strengthens the company’s position in advanced battery materials. It also supports faster commercialization of sodium-ion battery technologies.
E-Power develops AI data center microgrid solutions and advanced battery materials. With this new patent, the company adds an important asset to its energy storage portfolio. More importantly, the patented material targets better battery performance through a carefully engineered hard carbon composite.
Sodium-Ion Battery Hard Carbon Patent Supports Commercial Growth
Hard carbon remains a leading anode material for sodium-ion batteries. It offers a structure that suits sodium-ion storage well. Unlike graphite, hard carbon has a lower degree of structural order. In addition, it has larger interlayer spacing. As a result, it can host sodium ions more effectively in commercial battery designs.
E-Power’s patented P-Ag-Si/HC material builds on these strengths. The company combines phosphorus, silver, and silicon with hard carbon. Therefore, the composite aims to improve capacity, conductivity, and cycle life in one material platform. This design gives E-Power a strong foundation for future product development in sodium-ion battery applications.
How E-Power Designed Its Sodium-Ion Battery Hard Carbon Material
The patented material uses a multi-element co-doping approach. E-Power integrates Silicon (Si), Silver (Ag), and Phosphorus (P) into the Hard Carbon (HC) matrix. Each element serves a specific purpose. Together, they create a more capable anode material.
Silicon and Silver Improve Performance
Silicon adds high-capacity potential to the composite. Because of this, the material can support higher specific capacity. Silver, on the other hand, improves conductivity. As a result, the anode can deliver more efficient charge and discharge performance over time.
Phosphorus Tunes the Interface
Phosphorus helps regulate the electrochemical interface. In turn, this supports a more stable operating environment inside the battery. It also helps manage the structural changes that can occur during sodium storage. Therefore, the full composite can maintain strong cycling performance while preserving conductivity.
Hard Carbon Keeps Its Core Advantages
E-Power states that the composite keeps the core benefits of hard carbon. These benefits include low cost, fast charge-discharge capability, and solid low-temperature performance. Consequently, the patented material aligns well with large-scale energy storage needs and broader commercial use.
Why This Sodium-Ion Battery Hard Carbon Patent Matters
This patent marks an important step for E-Power’s battery materials strategy. It shows that the company is moving beyond standard anode manufacturing and into higher-value material innovation. Moreover, it supports the industrialization of hard carbon composite technologies through proprietary intellectual property.
The patent also arrives at a time when the energy storage market seeks cost-effective battery options. Sodium-ion batteries continue to attract attention for grid storage and other large-scale uses. Therefore, anode materials that improve performance can play a major role in future deployment.
Mr. Haiping Hu, Chairman of E-Power, said the patent reflects the company’s commitment to material innovation. He added that the P-Ag-Si/HC technology addresses stability and conductivity needs in sodium-ion batteries. As a result, E-Power aims to strengthen its role in the commercialization of next-generation energy storage materials.
E-Power Expands Its Advanced Battery Materials Portfolio
E-Power already operates in the battery anode materials sector through its joint venture. The company manufactures and sells graphite anode material for Lithium-ion batteries. In addition, the joint venture has completed a manufacturing facility with annual production capacity of 50,000 tons.
The plant uses low-cost electricity from renewable sources. Therefore, E-Power can support production efficiency while lowering environmental impact. This existing manufacturing base gives the company useful experience in scaling advanced anode materials. It also provides operational support for broader growth in battery materials.
Mr. Haiping Hu, the company’s founder and CEO, has worked in the graphite anode industry since 1999. Furthermore, E-Power states that its management team includes experts with years of experience and strong industry records. That background adds credibility to the company’s long-term push into high-performance battery material technologies.
Outlook for Sodium-Ion Battery Hard Carbon at E-Power
E-Power’s patent adds momentum to its energy storage strategy. The company now holds protected technology for a multi-element doped hard carbon composite. Because of this, it can deepen its role in sodium-ion battery development and related commercial applications.
Overall, the new patent highlights E-Power’s focus on practical battery innovation. It combines material science, process development, and commercial scale. In addition, it connects directly to demand for reliable and cost-conscious energy storage solutions. With Patent No. CN2023105784527, E-Power has taken a clear step toward expanding its influence in advanced sodium-ion battery hard carbon materials.
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