What are sodium-ion batteries and how do they differ from lithium-ion batteries?

Sodium-ion batteries use sodium ions as the charge carrier instead of lithium, making them cheaper and more abundant to source since sodium is far more plentiful than lithium. They currently offer slightly lower energy density than lithium-ion but are considered a strong alternative for stationary storage and entry-level EVs.

Which company is the leading manufacturer of sodium-ion batteries in 2026?

CATL and HiNa Battery (China) are widely regarded as the frontrunners in sodium-ion battery commercialization, with CATL having launched its first-generation sodium-ion cell and integrating it into hybrid battery packs for electric vehicles.

Are sodium-ion batteries ready for electric vehicles in 2026?

Yes, several sodium-ion batteries have reached commercial EV deployment as of 2026, particularly in lower-cost, shorter-range vehicles in China, though they remain less common than lithium-ion in long-range EVs due to their lower energy density.

What are the main advantages of investing in or watching sodium-ion battery companies?

Sodium-ion technology promises lower raw material costs, improved thermal stability, and reduced dependency on lithium, cobalt, and nickel supply chains, making it a strategically important sector for energy storage and EV markets.

What is the biggest challenge sodium-ion battery companies face in 2026?

The primary challenge is improving energy density to be more competitive with lithium-ion batteries, while simultaneously scaling up manufacturing capacity to bring costs down enough for widespread commercial adoption.

Lithium-ion battery / Wikipedia

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Top 10 Sodium-ion Battery Companies to Watch in 2026

Sodium-ion batteries trade a small energy-density disadvantage against lithium-ion for a real cost advantage, since sodium is far more abundant than lithium and the chemistry needs no cobalt. By 2026 the leading commercial cells — including CATL's Naxtra platform and BYD's blade-format cells — reach roughly 160-175 Wh/kg, within range of mainstream LFP, while several producers are demonstrating cycle lives into the tens of thousands of charges. This list ranks the ten sodium-ion companies with the most credible 2026 production scale, funding, and named commercial partnerships, from Chinese gigafactory leaders to smaller US, UK, French, Swedish, and Indian players building distinct strategic niches.

Community-RankedUpdated Sep 7, 2026

For decades, lithium-ion batteries have powered the clean energy transition — from the smartphones in our pockets to the grid-scale storage farms that buffer renewable electricity. But lithium is neither cheap nor abundant. It clusters in politically sensitive geographies, its supply chains are vulnerable to trade disruption, and its price swings have rattled the business models of EV makers and grid developers alike. Sodium-ion batteries — cells that use sodium atoms instead of lithium — have been a tantalizing alternative since the 1980s. The chemistry is elegant: sodium is the sixth most abundant element on Earth, extractable from seawater and rock salt at a fraction of lithium's cost. The raw material cost for sodium-ion cells is estimated to be 30 to 40 percent lower than lithium iron phosphate equivalents, and the technology dispenses entirely with cobalt and, in some designs, nickel. For years, the catch was energy density. Sodium atoms are larger and heavier than lithium atoms, and early sodium-ion cells struggled to pack competitive amounts of energy per kilogram. That gap is closing fast. By early 2026, leading cells hit 175 Wh/kg — within striking distance of mainstream LFP — while cycle lives of 10,000 to 20,000 cycles are being demonstrated at the lab and pre-commercial scale. The other shoe has now dropped: mass production. February 2026 marked a historic milestone when the world's first mass-production sodium-ion passenger vehicle rolled off a line jointly developed by CATL and Changan Automobile. BYD's 30 GWh sodium gigafactory in Xining, Qinghai commenced operations in July 2025. The market, valued at roughly $3.1 billion in 2026, is forecast to reach $13.1 billion by 2035 at a compound annual growth rate of nearly 20 percent. This list ranks the 10 companies most worth watching in 2026, evaluated across six dimensions: production scale and mass-manufacturing readiness, energy density and cycle life achieved at commercial cells (not just lab prototypes), total funding raised and the quality of institutional backing, depth of commercial partnerships and customer commitments, technology maturity measured by cathode chemistry and patent portfolios, and cost trajectory relative to lithium-ion incumbents. Companies are ranked on their 2026 impact, not future promises — scale today beats ambitious roadmaps. Western startups that have shut down (Natron Energy ceased operations in September 2025) or that remain purely pre-commercial are excluded. The resulting list spans four countries across three continents, reflecting the genuinely global nature of this technology race. Whether you are an investor screening battery sector exposure, an engineer evaluating next-generation grid storage chemistries, or an EV industry analyst tracking the emergence of lithium alternatives, this ranking gives you the concrete data points — founding years, energy density figures, funding totals, production capacity in gigawatt-hours, and named customer relationships — needed to assess competitive positioning in what may be the most consequential battery technology shift since LFP displaced NMC in budget EVs.

891 viewsJul 15, 2026 Updated Sep 7, 2026

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Wh/kg performance of commercial cells relative to peers — higher is better for EV range and volumetric efficiency

Rank	Item	Score	Notes
#1	CATL	10.0	CATL's Naxtra at 175 Wh/kg leads all sodium-ion producers in EV-grade energy density, matching mainstream LFP and enabling 500+ km range.
#2	BYD	8.0	BYD's blade sodium cell at ~160 Wh/kg is competitive for budget EVs and grid storage but trails CATL's Naxtra by 15 Wh/kg.
#3	Faradion (Reliance New Energy)	8.0	Faradion's 160 Wh/kg pouch cell is competitive with LFP; next-gen target of 190+ Wh/kg would lead Western producers if achieved.
#4	Altris AB	8.0	Altris Prussian White cells achieve 160 Wh/kg matching LFP, delivered without lithium, cobalt, nickel, or manganese.
#5	HiNa Battery Technology	7.0	HiNa's HE240 at >150 Wh/kg is production-proven for storage applications; NE170 at >100 Wh/kg is storage-only territory.
#6	Envision Energy	6.0	Envision's 180 Ah cell energy density is undisclosed in Wh/kg; 20,000 cycle life suggests a cycle-first design like Hithium's.
#7	Peak Energy	5.0	Peak Energy's NFPP chemistry is optimized for cycle stability and safety, not energy density — grid-specific positioning limits score.
#8	Altris AB x Tiamat Comparison: Sodion Energy	5.0	Sodion's 120-140 Wh/kg at pack level (not cell level) is the lowest on this list — adequate for urban two-wheelers, not competitive for EVs.
#9	Hithium	4.0	Hithium's N162Ah at 95 Wh/kg gravimetric sacrifices weight efficiency for extraordinary cycle life — purpose-built for stationary storage, not vehicles.
#10	Tiamat Energy	3.0	Tiamat's Gen1 at 90-110 Wh/kg is the lowest energy density on this list — Gen2's 140-160 Wh/kg target is not yet in production.

Current Rankings

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#1
CATL
No company in sodium-ion has more weight to throw around than CATL, and it shows: holding roughly 37% of the global lithium-ion market gave it the manufacturing infrastructure to out-produce every rival, BYD included. The April 2025 Naxtra family already delivers 175 Wh/kg — enough for 500+ km EV ranges and genuinely competitive with mainstream LFP — while the April 2026 BESS cell pushes further still, at 300+ Ah, 160 Wh/kg, 15,000 cycles to 80% retention, and 97% efficiency from -40°C to 70°C. Backing all of it is nearly 10 billion yuan (~$1.45 billion) in sodium-ion R&D and manufacturing partnerships with Changan, GAC, and JD.com. CATL itself is projecting 30-40% of the global battery market will run on sodium-ion — a bet only a company this size could make.
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#2
BYD
If CATL is betting on scale, BYD is betting on manufacturing speed — it broke ground on a 30 GWh sodium-ion gigafactory in Xining in early 2024 and had it running by July 2025, with a second 30 GWh facility following in Xuzhou. The chemistry behind it, an NFPP cathode, trades a little energy density for real thermal safety and cycle stability: the third-generation platform announced February 2026 surpasses 10,000 cycles to 80% retention at -40°C, more than triple what standard LFP manages, while cells in blade format still hit roughly 160 Wh/kg. The MC Cube-SIB extends that into utility storage, targeting 2-8 hour discharge windows at 1,200V.
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#3
HiNa Battery Technology
HiNa carries more institutional pedigree than most of the field — spun off from the Chinese Academy of Sciences in 2017 on top of three decades of academic research, and in 2022 it stood up the world's first 1,000-ton-scale sodium-ion cathode line. That head start shows in the grid-storage numbers: the HE240 cell runs 240 Ah at 150+ Wh/kg for 8,000 cycles at 0.5C across -40°C to 60°C, among the most cycle-stable products in this field, and the NE170 pushes to 10,000 cycles at 1C. HiNa also holds a genuinely unusual credential for heavy commercial vehicles — a fast-charging cell that fills in 20 minutes — and built both the world's first 100 MWh sodium-ion storage project and a 50 MW station in Hubei in July 2024. Production currently sits at 1 GWh against a 5 GWh roadmap, backed by Kecheng Capital and others at a 2022 valuation of $786 million.
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#4
Hithium
Hithium, founded in 2019, is the highest-valuation pure-play energy storage battery maker in sodium-ion, with a $4.2 billion valuation after Series C. Its N162Ah BESS cell uses a NaxFePO4 cathode, delivering 95 Wh/kg (lowest among the top four) but an unmatched cycle life exceeding 20,000 cycles—the highest for mass-produced sodium-ion cells. It earned UN38.3 certification in October 2024, with GWh-scale production in Q4 2025. Hithium's Infinity Power Solutions, launched December 2025, is the world's first lithium-sodium hybrid for AI data centers, combining an 8-hour lithium cell with a 1-hour sodium cell in a 6.9 MW/55.2 MWh system. A global agreement with Samsung C&T in August 2025 and a Texas facility (10 GWh) give Hithium a US footprint.
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#5
Faradion (Reliance New Energy)
Faradion has the oldest claim on this list, and it matters: founded in Sheffield in 2011, it pioneered the layered nickel-manganese-magnesium-titanium oxide cathode paired with hard carbon anodes that much of the industry now builds on, and its commercial cells still deliver a solid 160 Wh/kg at 32 Ah with 4,000 cycles to 80% retention. What changed its trajectory was Reliance Industries buying it for $136 million in 2022 and committing another $34 million for growth — Reliance now plans a sodium-ion gigafactory in Jamnagar to cut India's reliance on Chinese imports, and Faradion's technology-licensing role gives it a supply-chain position that no other Western sodium-ion startup currently occupies.
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#6
Peak Energy
Peak Energy is the one to know if you're tracking sodium-ion in the US specifically — it operates the country's first large-scale sodium-ion system, running on an NFPP polyanion cathode that eliminates thermal runaway outright and removes 85% of the causes behind battery failures generally. The GS-1.1 product backs that up with 3.1 MWh of storage at 95% DC round-trip efficiency across a -40°C to 55°C range, and in March 2026 a deployment with RWE went live on the MISO grid. The roadmap is aggressive: 5 GWh of production by 2028, 50 GWh by 2032, with a gigafactory already starting operations this year.
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#7
Tiamat Energy
Tiamat Energy’s NASICON cathode cells achieve 30C continuous and 100C pulse discharge, making them the fastest-charging sodium-ion option for power tools, UPS, and data centers. Gen1 cells provide 90 to 110 Wh/kg with over 5,000 cycles, while Gen2 targets 140 to 160 Wh/kg. Founded in 2017 in Amiens as a CNRS spin-off, the company secured $30 million in January 2024 from investors including Stellantis and Arkema. A 5 GWh gigafactory planned for 2029 will produce 500,000 cells daily, with 1.5 GW power output targeted for mid-2027. First 700 MWh/year phase shifted to 2026.
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#8
Altris AB
Altris makes its case on raw material simplicity: the Prussian White cathode is built from iron, salt, wood carbon, and air alone — no cobalt, nickel, or manganese — while still matching LFP at 160 Wh/kg. Founded in Uppsala in 2017 as a spin-off from the Angstrom Advanced Battery Centre, the company has raised $77.1 million total, including a Series B1 led by Clarios and the Volvo Cars Tech Fund, and its Sandviken factory turns out 2,000 tons of cathode a year, roughly 3 GWh equivalent. A partnership with Ligna Energy produced the world's first ultrathin sodium-ion battery for wireless electronics, a niche nobody else here is chasing. Northvolt had integrated Altris's technology before its 2024 restructuring.
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#9
Envision Energy
Envision is playing a different game than the pure-play startups on this list — it has the balance sheet to match its ambition. Its 180 Ah sodium-ion cell began rolling off production lines in March 2026, backed by a $500 million finance deal that closed the same month, and that financial weight lets it move into AI data center backup power — a market projected to exceed 300 GWh this decade — faster than capital-constrained rivals like Sodion Energy. The cell's 20,000-cycle life and -40°C to 70°C operating range hold up in the extreme environments where lithium degrades fastest, and Envision pairs it with a 12.5 MWh AI energy storage system running adaptive power conversion — a software layer none of the pure battery makers here can replicate.
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#10
Altris AB x Tiamat Comparison: Sodion Energy
Sodion's target market is unglamorous but enormous: India's two-wheeler segment sells 20 million units a year at prices under $2,000, and Sodion has built specifically for it. Its oxide-based cells deliver 120 to 140 Wh/kg at the pack level and outperform the average lithium-ion pack on thermal tolerance in tropical heat, while a cell-to-pack design that eliminates modules entirely undercuts even Altris's modular approach on cost for urban ranges of 80 to 150 km. Piloted at 100 MWh in Bengaluru and backed by India's PLI incentives plus agreements with three OEMs, Sodion has a home-market advantage that Tiamat's European focus can't reach.
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What actually separates a leader from a promising also-ran

Lab-stage specifications are the easiest thing for a battery company to claim and the hardest thing for a buyer to verify. The more reliable signals are certification (a cell cannot ship to a serious customer without passing safety and performance certification such as UL or UN38.3), named commercial contracts with real delivery dates, and production lines actually running at declared capacity rather than planned for a future year. Natron Energy is the cautionary case: it reached commercial-scale US production and had booked orders, but shut down in September 2025 because it could not get the certification its customers required in time to convert those orders into revenue. Technical achievement did not guarantee commercial survival. When comparing the companies below, weight certification and named customers at least as heavily as the headline Wh/kg number.

Energy density is not the only number that matters

A raw Wh/kg comparison across these companies is misleading without matching it to use case, because grid-storage cells and EV cells are optimized for different things. A stationary storage cell trades energy density for cycle life and wide operating-temperature tolerance, since it sits in a fixed location for a decade and never needs to be light. An EV cell optimizes the opposite way, accepting a shorter cycle life in exchange for maximizing range per kilogram. A company whose cell looks weaker on energy density alone may simply be building for grid storage rather than losing a fair fight on the same spec.