The surge in lithium carbonate prices four years ago sparked industry-wide calls for the 'Year of Sodium-ion Batteries.' As lithium prices later retreated, so did the hype. Now, with lithium carbonate prices back at high levels, sodium-ion batteries are in focus again, but the narrative this time is different.

Recent industry insights indicate the cost gap between large-format sodium-ion battery cells and lithium iron phosphate (LFP) cells has narrowed to approximately 0.1 yuan/Wh, with parity expected by year-end. On the cathode material cost front, sodium-ion is already competitive with LFP at a lithium carbonate price of 150,000 yuan per ton, with further reductions anticipated next year.

Furthermore, unlike four years ago, the industry chain is no longer mired in conceptual or technical route debates. The focus has shifted to scheduling mass production. Sources from CATL (ASX: 03750) revealed the first batch of sodium-ion battery energy storage systems will be delivered this year, with annual shipments targeted at the GWh scale.

An industry insider drew an analogy: sodium-ion batteries are approaching their own "LFP moment." The current state of sodium-ion bears some resemblance to the eve of LFP's own market turnaround.

However, behind this "resemblance," the stories may differ. LFP's victory came from capturing an existing market share from ternary batteries. The landscape facing sodium-ion is considerably more complex.

From Hedging to Betting

The term "LFP moment" refers to the current industrial inflection point for sodium-ion, bearing some similarity to LFP's overtaking of ternary batteries around 2020.

Prior to 2020, LFP was overshadowed by ternary batteries, criticized for insufficient energy density and range, keeping it from the mainstream. Starting in 2020, LFP's safety narrative was reshaped, CTP integration boosted system energy density, Tesla's full shift to LFP provided a demand signal, and rising lithium carbonate prices amplified LFP's cost advantage.

Within less than two years, LFP's share of installations surged from under 40% to over 60%. This inflection point resulted from the convergence of multiple conditions.

Sodium-ion is now replicating a similar convergence.

The slogan "Year of Sodium-ion Batteries" has been echoed for years, most prominently in 2022 when lithium carbonate soared past 600,000 yuan per ton, creating a perceived window of opportunity. The prevailing approach then was pragmatic: modify existing lithium battery production lines to produce sodium-ion cells quickly. This was a rational choice—retrofitting required lower investment and allowed for swift switching; if sodium-ion failed, exit was easy with limited losses. Essentially, the 2022 sodium-ion fervor was a hedge.

The situation is now entirely different.

At a recent industry event, Lin Jiubiao, CTO of Domestic Energy Storage Solutions at CATL, stated that sodium-ion batteries have entered a phase of comprehensive productization.

CATL has constructed a dedicated sodium-ion mass production line in Fuding, Fujian. The first batch of energy storage systems is slated for customer delivery in September, with a full-year target of GWh-scale shipments.

Ronbay Technology is following a path of validation before scaling. Wang Zunzhi, General Manager of Ronbay's Sodium-ion Battery Division, stated plainly that while LFP production lines can be adapted, significant issues arise, including very low production efficiency and stubbornly high processing costs. Ronbay's 6,000-ton pilot line in Xiantao, Hubei, aims to solve this by validating the specific equipment needed. Following successful validation, a dedicated 300,000-ton line is expected by 2027.

Wanhua Chemical has also made a decisive move, abandoning the coconut-shell hard carbon route entirely. Global coconut shell availability can only support 50-60 GWh of sodium-ion demand, insufficient for scale, prompting Wanhua to pivot to engineered hard carbon based on coal and resin.

Four years ago, companies used retrofitted lines for low-risk experimentation, allowing easy exit. Current actions indicate these firms now view sodium-ion not as a cyclical opportunity but as a structural shift.

And the bet makes economic sense. Wang Zunzhi revealed that dedicated, integrated sodium-ion production lines could reduce processing costs by 30% to 50% compared to existing LFP lines.

In other words, once dedicated lines are built, manufacturing costs could be lower than for LFP.

Cost data from multiple levels supports this. Wang Zunzhi indicated current mass-produced cathode material costs are already competitive with LFP at 150,000 yuan/ton lithium carbonate, projected to fall next year to levels competitive with LFP at under 60,000 yuan/ton lithium carbonate.

The cost reduction on the anode side is even more dramatic. Hard carbon prices have dropped from 60,000 – 70,000 yuan/ton in 2024 to an estimated 35,000 – 40,000 yuan/ton this year, with a long-term target below 25,000 yuan/ton. At the cell level, according to Zhou Bo, General Manager of the Research Center at the China Industrial Association of Power Sources, the cost difference between large-format sodium-ion cells and LFP cells is only about 0.1 yuan/Wh, with parity expected by year-end and a long-term potential to reach 0.3 yuan/Wh. System costs have also decreased from 1.15 yuan/Wh last year to about 1 yuan/Wh this year. From materials to cells to systems, costs are converging with those of lithium batteries.

Cell maturity has also reached the threshold for mass production and delivery. Lin Jiubiao noted that the current generation of sodium-ion batteries achieves a cycle life of 15,000 cycles, with wide-temperature performance exceeding the applicable boundaries of lithium batteries.

Additionally, the first national standard for sodium-ion batteries in power energy storage took effect in March this year, and sodium-ion has been included in the diversified technology roadmap for new energy storage in the 15th Five-Year Plan period. In late April 2026, CATL signed a three-year, 60 GWh sodium-ion cooperation agreement with Hyperstrong, the largest sodium-ion battery order globally to date.

Cost convergence, dedicated line production, standard implementation, and anchor orders secured. This confluence of factors is why industry insiders believe sodium-ion is approaching its "LFP moment."

Multiple Fronts, Not Just One Battlefield

Another key difference from four years ago is the market discussion. The past often centered on sodium-ion "replacing" lithium batteries. Currently, it appears sodium-ion doesn't need to seize market share from lithium; it has its own demand map.

Zhou Bo explained that industrial sites with self-built grids, such as oil fields and mining areas, are directly deploying sodium-ion commercial and industrial energy storage. These locations often have extreme climates and weak grid coverage, posing challenges for lithium batteries. Energy storage demand in high-altitude and severely cold regions is also emerging. In the start-stop power source sector, companies achieved 200 MWh of sodium-ion application last year, accelerating the trend of replacing lead-acid batteries. The two-wheeler market represents another growing arena for lead-acid replacement.

Sodium-ion is primarily targeting replacements for routes like lead-acid or filling performance gaps where lithium falls short. It's not about slicing a piece of lithium's pie but opening new demand channels.

Within the energy storage sector itself, application scenarios are diversifying. Discussing long-duration energy storage, Lin Jiubiao noted that sodium-ion's low heat generation and wide-temperature performance, combined with low-rate scenarios of 4 to 8 hours, could potentially eliminate liquid cooling systems for ultra-simple integration. Liquid cooling is a complete subsystem with its own supply chain, operation and maintenance needs, and failure modes, and is one of the highest failure-rate components in current energy storage systems. Removing it reshapes not just a single cost item but the entire value chain of the energy storage system.

Wang Lei, General Manager of the Experimental Testing Center at Hyperstrong, provided supporting evidence: sodium-ion batteries can still release 90% capacity at -40°C; with 15,000 cycles and an average of two charge-discharge cycles per day, they can operate for 20 years; system conversion efficiency reaches 97%. These aren't just about being cheaper than LFP; they represent capabilities LFP cannot achieve.

As industrialization capabilities gradually catch up to lithium and application scenarios expand in multiple directions, sodium-ion is no longer facing a zero-sum game for existing market share but a map of unfolding incremental opportunities. Coupled with China's reliance on imports for 60% of its lithium ore versus its 22% global share of sodium resources, the industrial logic for sodium-ion extends beyond economics to include strategic considerations for supply chain security.

Plans are already in motion. Ronbay Technology aims to deliver 28,000 tons of capacity this year, with its dedicated 300,000-ton line operational by 2027, a domestic capacity target of 1.2 million tons before 2030, and a medium-to-long-term global plan for 3.5 million tons. Wang Zunzhi described the vision as "producing cathode material like producing cement." He set two prerequisites for overseas plant construction: a genuine explosion in the overseas energy storage market, and sodium-ion process simplification enabling localized production anywhere.

Hyperstrong initiated a dual-track strategy for lithium and sodium this year, with the first pilot projects for integrated lithium-sodium energy storage power stations to be implemented within the year. Wang Lei stated that the hardware platform for sodium-ion energy storage systems already enables lithium-sodium compatibility, and BMS and PCS software can be deployed rapidly without large-scale restructuring. This also means the switching cost for downstream integrators is lower than many assume.

An industry expert commented that looking ahead to the 15th Five-Year Plan period, the sodium-ion battery energy storage industry should leverage policy support to accelerate R&D and industrialization, focus on the quality of demonstration projects, continuously improve techno-economic performance, and actively expand application scenarios such as large-scale bases and computing-power coordination.

LFP won by capturing share on the same battlefield. Sodium-ion's opportunity lies elsewhere—in temperatures lithium cannot reach, in scenarios where lead-acid should be phased out, and in areas where energy storage systems need redesigning.

The industry chain has already scheduled its timeline out to 2028. By then, what will be tested is not only the viability of the sodium-ion path but also whether China's new energy industry can establish another pillar beyond lithium batteries.