Sunrise New Energy Announces Hard Carbon Composite Material Patent for Solid-State and Low-Temperature Energy Storage Batteries

Sunrise New Energy (NASDAQ: EPOW) announced that its subsidiary published a patent titled “Spherical Hard Carbon Composite Material and Its Preparation Method” (CN2025106204848) on Dec 10, 2025.

Rhea-AI Summary

Sunrise New Energy (NASDAQ: EPOW) announced that its subsidiary published a patent titled “Spherical Hard Carbon Composite Material and Its Preparation Method” (CN2025106204848) on Dec 10, 2025. The patent targets hard carbon anode materials for low-temperature energy storage batteries, particularly sodium-ion batteries, and describes a spherical composite structure, optimized carbon framework, and improved conductive/ionic pathways and surface treatments.

The technology is presented as addressing low-temperature conductivity, ion diffusion, capacity retention, high-rate performance, and cycling durability. The company said it will continue engineering validation, performance testing, and industrialization efforts to accelerate commercialization of the material.

Argus Dec 10 session

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Details

News Market Reaction – EPOW

On Dec 10, the day this news came out, EPOW closed 3.81% below the previous close.

Data tracked by StockTitan Argus for the Dec 10 session.

Key Figures

Patent number: CN2025106204848

Patent number

CN2025106204848

Spherical hard carbon composite material patent for sodium-ion batteries

Historical Context

5 past events · Latest: Dec 09

5 events

1. Dec 09

   R&D grant funding

   24h Move

   +1.9%

   Guizhou silicon-carbon anode project passed mid-term review and gained $730,000.

2. Dec 08

   Patent publication

   24h Move

   -2.8%

   Publication of high-capacity alloy anode patent for lithium-ion solid-state batteries.

3. Dec 05

   Supply contract

   24h Move

   -2.8%

   5,000-ton anode material supply deal with Pylontech worth USD 15.1 million.

4. Dec 05

   Fast-charge patent

   24h Move

   -7.0%

   Patent on improving fast-charging performance of silicon-carbon composite anodes.

5. Dec 04

   Solid-state patent

   24h Move

   +6.0%

   China patent for lithium cerate–coated graphite iron oxide anode material.

24h Move is the share-price change in the day after each event; other market factors may also have contributed.

Key Terms

hard carbon composite anode materials, sodium-ion batteries, energy storage batteries, carbon framework, +4 more

8 terms

hard carbon composite anode materials technical

"The invention targets hard carbon composite anode materials used in low-temperature..."

Hard carbon composite anode materials are engineered, non‑graphite carbon mixtures used as the negative electrode in rechargeable batteries; they combine dense “hard” carbon with binders or additives to store and release lithium or sodium ions. For investors, anode quality is a key driver of battery range, charge speed, lifespan and cost—think of the anode as a sponge that determines how much, how fast and how reliably a battery can hold and deliver energy.

sodium-ion batteries technical

"...used in low-temperature energy storage batteries, particularly sodium-ion batteries..."

Rechargeable batteries that move sodium ions between two electrodes to store and release electricity; they work like lithium-ion batteries but use common sodium (found in table salt) instead of scarce lithium. Investors care because sodium is cheaper and more widely available, which could lower battery costs and supply risk for electric vehicles and grid storage, though performance and commercial maturity can differ from lithium technology.

energy storage batteries technical

"…used in low-temperature energy storage batteries, particularly sodium-ion batteries..."

Energy storage batteries are devices that store electrical power for later use, like a home pantry that holds food until you need it. They let utilities, businesses and consumers save excess electricity—often from wind or solar—and release it during peak demand or outages, improving reliability and lowering costs. For investors, battery systems can drive new revenue streams, reduce operating risks tied to energy prices, and influence capital spending and regulatory incentives across energy and manufacturing companies.

carbon framework technical

"...by designing a spherical hard carbon composite structure, optimizing the carbon framework..."

A carbon framework is a company's organized approach for measuring, managing and reporting its greenhouse gas emissions and related goals. It lays out the rules, data sources and steps the company uses to track progress—similar to a household budget that shows where carbon is 'spent' and where cuts can be made. Investors use it to judge climate risk, compliance and whether a company’s claims about reducing emissions are credible and actionable.

ion diffusion efficiency technical

"These innovations aim to enhance low-temperature conductivity, ion diffusion efficiency..."

Ion diffusion efficiency measures how quickly and smoothly charged particles (ions) move through a material such as a battery electrode, electrolyte or membrane. For investors, it matters because higher efficiency typically means faster charging, better usable capacity, lower heat and longer lifespan for devices; think of it like traffic flow on a highway—fewer bottlenecks mean better performance, lower costs and stronger market competitiveness.

structural stability technical

"...ion diffusion efficiency, and structural stability, enabling superior capacity retention..."

Structural stability is the degree to which a company’s underlying framework—its business model, capital setup, operations and governance—can absorb shocks and continue functioning without major change. For investors, it’s like a building’s foundation: a more stable structure means lower risk that unexpected events will force costly repairs, interruptions or a complete redesign, making future cash flows and valuations more predictable.

capacity retention technical

"...enabling superior capacity retention, high-rate performance, and cycling durability..."

Capacity retention measures how much of a rechargeable battery’s original energy-holding ability remains after use or over time, expressed as a percentage of its initial capacity. For investors, it signals product durability and long-term performance—like how much charge a phone battery still holds after many charges—and affects customer satisfaction, replacement costs and the competitiveness of a company’s energy products.

cycling durability technical

"...capacity retention, high-rate performance, and cycling durability in sodium-ion..."

Cycling durability measures how well a rechargeable battery or similar energy storage device holds up to repeated charging and discharging before its performance noticeably worsens. Think of it like the lifespan of a running shoe: the more miles before the sole wears out, the better the value. For investors it signals product reliability, replacement costs and long-term warranty exposure, which affect revenue, margins and customer trust.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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DOVER, USA, Dec. 10, 2025 (GLOBE NEWSWIRE) -- 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.

“This technology will further enhance our portfolio of advanced energy storage materials and strengthen the Company’s competitiveness in the global energy storage market, while also expanding into low-temperature sodium-ion storage solutions,” said Haiping Hu, Founder and CEO of Sunrise. “We will continue to advance engineering validation, performance testing, and industrialization efforts for this patented technology, with the objective of accelerating the commercialization of high-performance battery materials.”

About Sunrise New Energy Co., Ltd

Headquartered in Zibo, Shandong Province, China, Sunrise New Energy Co., Ltd., through its joint venture, is engaged in the manufacturing and sale of graphite anode material for lithium-ion batteries. The Company's joint venture has completed the construction of a manufacturing facility with a production capacity of 50,000 tons in Guizhou Province, China. The plant runs on inexpensive electricity from renewable sources, which helps to make Sunrise New Energy a low-cost and low–environmental-impact producer of graphite anode material. Mr. Haiping Hu, the founder and CEO of the Company, is a major pioneer for the graphite anode industry in China starting from 1999. The Company’s management team is also composed of experts with years of experiences and strong track-records of success in the graphite anode industry. In addition, the Company also operates a knowledge sharing platform in China. For further information, please visit the Company’s website at www.sunrisenewenergy.com.

Forward-looking statement

Certain statements in this press release regarding the Company's future expectations, plans and prospects constitute forward-looking statements as defined by Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements about plans, goals, objectives, strategies, future events, expected results, assumptions and any other factual statements that have not occurred. Any words that refer to "may", "will", "want", "should", "believe", "expect", "expect", "estimate", "estimate" or similar non-factual words, shall be regarded as forward-looking statements. Due to various factors, the actual results may differ materially from the historical results or the contents expressed in these forward-looking statements. These factors include, but are not limited to, the company's strategic objectives, the company's future plans, market demand and user acceptance of the company's products or services, technological updates, economic trends, the company's reputation and brand, the impact of industry competition and bidding, relevant policies and regulations, the ups and downs of China's macroeconomic conditions, the relevant international market conditions, and other related risks and assumptions disclosed in the Company’s Annual Report on Form 20-F published on the SEC’s website. In view of the above and other related reasons, we urge investors to visit the SEC’s website and consider other factors that may affect the Company's future operating results. The Company is under no obligation to make public amendments to changes in these forward-looking statements unless required by law.

For more information, please contact:

The Company:
IR Department
Email: IR@sunrisenewenergy.com
Phone: +86 4009919228

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What is the patent Sunrise New Energy filed for CN2025106204848 and when was it published?

The patent is titled “Spherical Hard Carbon Composite Material and Its Preparation Method” and was published on Dec 10, 2025.

How does Sunrise say the CN2025106204848 patent affects sodium-ion batteries (EPOW)?

The company says the patent targets hard carbon anodes to improve low-temperature conductivity, ion diffusion, capacity retention, and cycling durability in sodium-ion batteries.

Which Sunrise subsidiary published the hard carbon composite patent (EPOW)?

The patent was published by Sunrise (Guizhou) New Energy Materials Co., Ltd., a subsidiary of Sunrise New Energy.

Will Sunrise commercialize the patented spherical hard carbon composite (EPOW)?

The company said it will continue engineering validation, performance testing, and industrialization efforts with the objective of accelerating commercialization.

What battery applications does Sunrise target with patent CN2025106204848 (EPOW)?

The patent targets low-temperature energy storage applications, including large-scale energy storage systems and commuter and remote-area power infrastructure, focusing on sodium-ion batteries.

Does the patent description explain how performance is improved at low temperatures (EPOW)?

Yes; it describes a spherical hard carbon composite structure, optimized carbon framework, improved conductive/ionic pathways, and enhanced surface and interfacial treatments to address low-temperature performance challenges.