Sodium-ion battery energy storage is transitioning from demonstration and verification to the fast lane of scaled application.
In the past, sodium-ion batteries were viewed as "spare tires" or "supplements", but at the June Ministry of Industry and Information Technology (MIIT) "Sodium-ion Battery Energy Storage Industry Technology and Application Survey Exchange Activity" meeting, representatives from all links of the industry chain, from material innovation to system integration and further to downstream applications, gave completely different judgments.
Synchronized maturity at the material, manufacturing, system, and application ends.
The era of sodium batteries has truly arrived.
The most solid advantage of sodium-ion batteries is not technology, but the geopolitical immunity of resource endowments.
Lithium resources are extremely unevenly distributed globally, and China's dependence on external lithium raw materials has long exceeded 60%. Cobalt and nickel resources are also highly concentrated in countries such as the Democratic Republic of Congo and Indonesia.
This concentration of resources exposes the lithium battery industry chain to continuous geopolitical risks and price volatility risks.
Sodium resources are completely different, with a crustal abundance of about 2.3%, over 1,000 times that of lithium; reserves in seawater and salt lakes are almost infinite; China is the world's largest producer of crude salt, with crude salt production exceeding 100 million tons in 2025.
This means the raw material supply for sodium battery cathode materials is completely free from international resource political constraints.
Breakthrough at the Material End
Recreating the LFP Miracle
Whether sodium-ion batteries can be applied on a large scale depends on materials and costs.
"Sodium-ion batteries are recreating the Lithium Iron Phosphate path of 2020." Wang Zunzhi, General Manager of the Sodium Battery Division of Ronbay Technology, judged.
He provided specific data support:
Currently, the pressed density of sodium battery cathode sheets has increased to 2.5g/cm³, the cycle life of composite sodium ferrous phosphate (NFPP) exceeds 15,000 times, and production stability is constantly being verified.
As the leader in cathode materials, Ronbay Technology is vigorously promoting the polyanion route centered on NFPP.
Wang Zunzhi revealed that the company, through its pioneering adaptation of sodium battery processes and equipment, innovatively reduced the processing cost of polyanion sodium battery materials by 30%-50%, which is undoubtedly a key move to accelerate sodium battery mass production.
In terms of capacity layout, Ronbay has landed 6,000 tons of polyanion cathode material capacity in Xiantao, Hubei, which will expand to 28,000 tons in 2026. By 2027, it plans to build a 300,000-ton sodium battery production line according to market demand.
There is also good news for anode materials.
The cost reduction rate of hard carbon anodes has exceeded market expectations, and is expected to drop from 60,000 to 70,000 Yuan per ton in 2024 to 35,000 to 40,000 Yuan in 2026, with a long-term goal aimed below 25,000 Yuan/ton.
Wei Dong, General Manager of the Marketing Center of Wanhua Chemical Battery Industry Company, stated that opening up two engineering hard carbon technology routes based on coal and resin fundamentally solves the supply limitations and performance fluctuations caused by early reliance on natural biomass raw materials.
The coal-based route has prominent cost advantages, suitable for price-sensitive scenarios, while the resin-based route performs better in product consistency and comprehensive performance.
Specifically, the NFPP (composite sodium ferrous phosphate) route promoted by Ronbay Technology has sodium phosphate and ferrous sulfate as its core raw materials, which are bulk chemical products with extremely mature supply chains.
The coal/resin-based hard carbon route opened by Wanhua Chemical, the raw materials come from coal chemical by-products and petrochemical products, both of which have sufficient domestic supply in China.
Cathode cost halved, anode cost halved, the cost reduction curve at the material end is clear.
Sodium-ion Battery
Has Welcomed Full Productization
The maturity of the material end has provided battery and system integrators with the possibility of stepping onto the stage.
Lin Jiubiao, CTO of CATL's domestic energy storage solutions, stated: "Sodium-ion batteries have ushered in the era of full productization."
CATL has made rapid progress in sodium-ion batteries.
Sodium-ion battery characteristics reconstruct electrochemical models, tackling mass production difficulties such as hard carbon electrode moisture control and gas production, and the products have wide temperature ranges and 15,000 times ultra-long cycle life.
Lin Jiubiao introduced that CATL adopts a "One Shell, Two Cores" platform solution, maintaining the same dimensions as lithium battery systems and achieving convenient switching.
A complete energy storage unit composed of a 3MWh DC cabin and a 3MW step-up converter integrated machine has been launched, with a system lifespan of 20 years.
Lin Jiubiao also revealed the mass production and delivery schedule.
CATL is promoting cost reduction in two aspects: product design and manufacturing production, and a dedicated sodium-ion battery production line has been built and put into production. At the same time, since sodium battery materials do not contain lithium, cobalt, or nickel, it does not need to bear the premium of these strategic metals.
In September this year, the company will deliver the first batch of sodium-ion battery energy storage systems to customers, achieving GWh-level shipments for the full year. This marks that sodium battery energy storage has truly entered the commercial delivery stage.
GWh-level shipments mean that sodium-ion battery energy storage is no longer megawatt-level demonstration, but has truly entered the track of scaled commercial delivery.
Large Orders Locked
Wang Lei, General Manager of HiTHiSTOR Experimental Test Center, gave a clear application scenario:
Sodium-ion battery energy storage has significant differentiation advantages in large-scale independent energy storage power stations, computing-power synergy and other new high-energy-consuming scenarios, 4-6 hours and above long-duration energy storage, high-cycle frequency energy storage projects, and projects with operational cycles of more than 15 years.
At a large wind-solar base in Northwest China, a lithium-sodium fusion energy storage power station was built supporting it. During the day, solar power generates, and the lithium battery system is responsible for high-frequency frequency regulation response; at night, when 4-6 hours of stable power support is needed, sodium batteries with cost advantages and long cycle life begin to play a role.
This "Lithium-Sodium Fusion" mode not only exerts the high energy density and fast response advantages of lithium batteries, but also utilizes the economy and long-duration energy storage capabilities of sodium batteries, achieving the maximization of overall system benefits.
In addition, with the development of AI large models, "computing-power synergy" has become a highly promising scenario.
Data center power demand surges and requires uninterrupted, high-quality power supply. The excellent wide temperature range performance and inherent safety of sodium-ion batteries make it an ideal choice for data center backup power and peak-valley arbitrage.
Seeing the potential demand, the market has voted with its feet. HiTHiSTOR will promote the scaled application of sodium-ion battery energy storage and build a lithium-sodium fusion energy storage power station demonstration project, with the first batch of projects to be implemented and landed within 2026.
CATL and HiTHiSTOR have signed a 3-year sodium-ion battery energy storage order with a scale of 60GWh. This super-large order has injected strong confidence into the entire sodium battery industry chain.
Future
Industry confidence also comes from the support of top-level design.
Liu Yafang, adjunct professor at Zhejiang University and chief expert at China Energy Society, pointed out that looking forward to the "15th Five-Year Plan", the sodium-ion battery energy storage industry should take advantage of policy tailwinds to accelerate R&D and industrialization landing, and actively expand large base, computing-power synergy and other application scenarios.
Of course, challenges still exist.
Zhou Bo, General Manager of the Research Center of the Power Battery Application Branch of China Association for Chemical and Physics Power Sources, suggested that the industry needs to quickly promote the establishment of standards and certification systems for the full lifecycle and accelerate the industrialization process.
Ronbay Technology's 300,000-ton capacity plan, Wanhua Chemical hard carbon anode cost moving towards 25,000 Yuan/ton, CATL's GWh-level shipment and "One Shell, Two Cores" platform design, HiTHiSTOR's 60GWh order lock.
15,000 times cycle life technology verification, 20-year system life commercial commitment, sodium-ion battery energy storage industry is completing the key leap from "technically feasible" to "commercially feasible".
From cost reduction breakthroughs at the material end, to GWh-level delivery at the system end, to the 60GWh large order lock at the application end, sodium-ion battery energy storage is no longer a "concept" or "alternative".
The key point is that HiTHiSTOR proposed "building a lithium-sodium fusion energy storage power station demonstration project", and CATL adopted the "One Shell, Two Cores" scheme to achieve lithium-sodium same dimension switching.
The true advantage of sodium-ion battery energy storage is not to replace lithium iron phosphate, but to form a complementary combination with lithium batteries in a large-scale energy storage system:
Lithium batteries undertake the main role of high energy density and high power density.
Sodium batteries undertake the auxiliary role of long-duration energy storage, high cycle frequency, and low-temperature environments.
Through unified platform design (same dimensions, same interface), reduce the complexity of system integration and switching costs.
This "Lithium-Sodium Fusion" architecture can optimize the asset portfolio of the entire energy storage system:
Use sodium batteries to cover operating conditions that lithium batteries are not good at or uneconomical, thereby improving the full lifecycle returns of the entire power plant. Under this framework, the advantages of sodium batteries are not absolute, but relatively complementary.
Cars in winter, that's the guarantee~
