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Synopsis: The solid-state battery race has left the laboratory and entered the factory floor. As of 2026, the global solid-state battery market is valued at an estimated $2.3 billion and growing fast. A handful of companies — carmakers, battery giants, and determined startups — are placing bets worth billions on this next-generation technology. This article profiles the top 10 companies leading in solid state battery development, what each has actually done, and what they are building toward.
A battery, at its most basic, is an argument between chemistry and physics. The question is always the same: how much energy can you pack into how little space, how safely, and how cheaply? For three decades, the lithium-ion battery won that argument by a comfortable margin. Then the world changed. Electric vehicles needed more range. Smartphones needed slimmer profiles and longer days. Defense contractors needed power sources that wouldn’t catch fire in a combat zone. And grid operators needed storage that could run for years without degrading.
Solid-state batteries answer each of those demands by replacing the liquid electrolyte inside a conventional cell with a solid material — ceramic, polymer, or sulfide. The result is a battery that is denser, safer, and longer-lived. The engineering challenge is making it affordable and manufacturable at scale. That is precisely what the ten companies in this article are attempting — at considerable financial risk, and with considerable reward waiting on the other side.
By 2026, the global EV solid-state battery market is estimated at $372 million, projected to reach $2.23 billion by 2031 at a CAGR of 43.11%. The companies profiled here are the ones the rest of the industry watches. They represent the deepest pockets, the boldest timelines, and in several cases, the results that are beginning to show.
Table of Contents
1. Toyota
There is a reason Toyota comes first in nearly every analysis of the solid-state battery race. The Japanese automaker has been building its solid-state program since before most competitors recognized the technology as commercially relevant. Toyota currently holds over 1,000 solid-state battery patents globally, a figure that places it among the world’s undisputed leaders and creates a technological barrier that would take rivals years to replicate even if they started today.
The numbers behind Toyota’s ambition are striking. Its first solid-state battery, planned for mass production in 2027–2028 in collaboration with partners including Idemitsu Kosan and Sumitomo Metal Mining, is designed to deliver around 1,000 km of driving range with a charge time of just 10 minutes from 10% to 80%. A higher-level specification currently in parallel development targets 50% more range still. In October 2025, Toyota’s solid-state battery officially received production approval in Japan, with plans to first equip it in Lexus flagship models in 2027.
The partnership structure Toyota has assembled is equally impressive. Idemitsu Kosan broke ground in early 2026 on a new lithium sulfide plant — backed by Japan’s Ministry of Economy, Trade and Industry — with Toyota as its first customer. Sumitomo Metal Mining signed a joint development agreement with Toyota in October 2025 specifically for mass-producing cathode materials. Through patent leadership, government backing, and a disciplined supply chain strategy, Toyota has positioned itself to be the first carmaker to put solid-state batteries into a production vehicle.
- Key technology: Sulfide electrolyte route, 450–500 Wh/kg energy density
- Key milestone: Production approval received in Japan, October 2025
- Target: Mass production 2027–2028; Lexus flagship integration by 2027
- Key partners: Idemitsu Kosan, Sumitomo Metal Mining
2. QuantumScape
QuantumScape occupies a distinctive position in the solid-state battery world: it is not a car company, not a traditional battery manufacturer, and it does not plan to build gigafactories itself. Its strategy is to develop and license its proprietary solid-state lithium-metal battery technology — specifically its ceramic separator and anode-free architecture — to manufacturing partners who do the heavy lifting of production. That approach is either very clever or very precarious, depending on how the next few years unfold.
The evidence from 2025 and early 2026 suggests it is working. QuantumScape’s flagship QSE-5 cell — produced using its breakthrough Cobra separator process, which is roughly 25 times faster than the previous system — was delivered as B1 samples to customers in Q3 2025. The cells achieved an energy density of 844 Wh/L and demonstrated fast-charging from 10% to 80% in just over 12 minutes. The Ducati V21L electric race motorcycle powered by QSE-5 cells made its world debut at IAA Mobility in Munich in September 2025, marking the technology’s first real-world vehicle demonstration.
On the commercial side, QuantumScape posted $19.5 million in customer billings in 2025, primarily from Volkswagen’s PowerCo subsidiary, which has committed up to $261 million in total to support joint development and holds the right to license up to 85 GWh of annual production capacity. In December 2025, the company signed a Joint Development Agreement with a new Top-10 global automaker, and in February 2026 it inaugurated its Eagle Line pilot production facility in San Jose — described as the blueprint for future gigawatt-hour-scale production by its licensing partners.
- Technology: Ceramic separator, anode-free lithium-metal, QSE-5 cells at 844 Wh/L
- Key milestone: Eagle Line pilot facility inaugurated February 2026
- Key partners: Volkswagen PowerCo, Murata Manufacturing, Corning, Ducati/Audi
- Business model: Asset-light licensing to automotive and battery partners
3. CATL
Contemporary Amperex Technology Co., Limited — known universally as CATL — is the world’s largest lithium-ion battery manufacturer, holding a commanding 36.8% of the global EV battery market. A company in that position does not need solid-state batteries to stay profitable this year. What it needs is to ensure that solid-state batteries, when they arrive, do not make everything it has built obsolete. That existential logic explains why CATL has over 1,000 researchers dedicated to the technology and has been investing in it for nearly a decade.
CATL’s approach is characteristically methodical. Rather than racing to claim a solid-state launch date it cannot meet, the company has built a dual-track strategy: semi-solid-state “condensed matter” batteries that are already in production and generating real revenue, while full all-solid-state technology progresses toward small-scale production in 2027. Its condensed matter battery — which uses a gel-like electrolyte bridging liquid and solid chemistries — has reached 500 Wh/kg in a 20Ah prototype and is already powering the NIO ET7’s 150 kWh pack, achieving over 1,000 km of tested range. CATL has also applied condensed batteries in the EHang EH216 manned eVTOL aircraft.
The company is pursuing a sulfide electrolyte route for its all-solid-state product, has entered trial production of 20Ah samples, and aims to progress to 60Ah automotive-grade prototypes. At its April 2026 Technology Day, CATL unveiled its Qilin Condensed Battery with a gravimetric energy density of 350 Wh/kg and volumetric density of 760 Wh/L, capable of powering executive sedans to 1,500 km range. The company’s timeline is deliberate: small-scale all-solid-state production by 2027, large-scale application before 2030.
- Technology: Dual-track: condensed matter (semi-solid) + sulfide all-solid-state
- Key milestone: Condensed battery in production; 20Ah all-SSB samples in trial production
- Target: Small-scale all-SSB production 2027; mass application pre-2030
- Advantage: Largest existing manufacturing base and supply chain of any player
4. Panasonic
Panasonic does not generate the same volume of solid-state headlines as Toyota or QuantumScape, but it belongs in this conversation for a straightforward reason: it is one of the most experienced large-scale battery manufacturers on Earth, and it is moving its considerable resources toward next-generation technology. Panasonic’s existing relationship with Tesla — supplying cylindrical lithium-ion cells from its Nevada gigafactory and the new Kansas facility, which began production in July 2025 with an annual capacity of 32 GWh — gives it a manufacturing depth that most solid-state startups can only aspire to.
Panasonic’s solid-state strategy leans heavily on its long-standing partnership with Toyota. The two companies have collaborated on battery development for years, and Toyota’s push toward solid-state commercialization in 2027–2028 directly implicates Panasonic’s manufacturing capabilities. Panasonic has publicly stated targets for solid-state battery commercial readiness between 2027 and 2030, consistent with the broader Japanese automotive-industrial timeline. The company’s advantage is not a single dramatic breakthrough but rather the accumulated process knowledge of decades making battery cells at automotive scale.
In the near term, Panasonic’s $4 billion, 4.7 million-square-foot Kansas gigafactory — one of the largest battery investments in the company’s 107-year history — demonstrates the kind of manufacturing ambition that will eventually serve its solid-state ambitions. A company that can build and operate facilities of that scale has the institutional muscle to transition production lines when the chemistry is ready.
- Key relationship: Long-term partner of Toyota; established supplier to Tesla
- Kansas facility: 32 GWh annual capacity, production began July 2025
- SSB target: Commercial readiness targeted between 2027 and 2030
- Advantage: Decades of automotive-scale battery manufacturing experience
5. Solid Power
Solid Power is a Louisville, Colorado-based company that has staked its future on a specific bet: that sulfide-based solid electrolytes offer the best combination of conductivity and manufacturability of any solid-state chemistry, and that this chemistry can be integrated into existing lithium-ion production infrastructure. That last point is what makes Solid Power commercially interesting to automakers — it is not asking BMW or Ford to rebuild their factories from scratch.
In May 2025, Solid Power and BMW reached a milestone by integrating large-format all-solid-state cells into a BMW i7 test vehicle, the first real-world automotive integration of the technology. Later in 2025, Solid Power announced a Joint Evaluation Agreement with both Samsung SDI and BMW to progress all-solid-state battery development — a trilateral partnership that validates the company’s electrolyte technology from multiple angles simultaneously. On the manufacturing side, the company completed factory acceptance testing on its pilot cell line at SK On’s facility and is on track to install a continuous electrolyte production pilot line by end of 2026. Solid Power delivered $21.7 million in revenue in 2025.
Solid Power’s technology roadmap targets cell costs of US$85 per kWh using silicon-anode and lithium-metal designs — a figure that would make solid-state batteries economically viable for mass-market EVs. Its current pilot electrolyte manufacturing capacity stands at 30 metric tons per year, with plans to grow to 75 metric tons by end of 2026. For an industry still debating whether solid-state manufacturing is even possible at scale, those concrete tonnage targets carry real weight.
- Technology: Sulfide-based solid electrolytes; compatible with existing Li-ion manufacturing
- Key milestone: BMW i7 test vehicle integration, May 2025; Joint Evaluation Agreement with BMW & Samsung SDI
- 2025 Revenue: $21.7 million, primarily from SK On line installation agreement
- Partners: BMW, Ford, Samsung SDI, SK On
6. Samsung SDI
Samsung SDI is the battery-making arm of the Samsung Group, and it operates with the kind of financial firepower that allows it to make long-range bets without flinching. The company began solid-state research nearly a decade ago, long before most competitors recognized its commercial potential. Its Samsung Advanced Institute of Technology announced a major prototype breakthrough in 2020 capable of powering an EV for 500 miles and surviving over 1,000 charge cycles. The silver-carbon composite layer it developed at that stage allowed for a lithium anode just half the thickness of conventional designs, dramatically improving energy density.
By 2024, Samsung SDI had a concrete public roadmap: a target energy density of 900 Wh/L with its all-solid-state battery, representing a 40% improvement over its current P5 lithium-ion cells. The company’s S-Line pilot production facility at its R&D center in Suwon, South Korea, is producing samples and supplying them to global automakers. Mass production is targeted for 2027. Samsung SDI has invested 354.1 billion won toward its domestic all-solid-state battery line through 2026. In late 2025, it joined the trilateral Joint Evaluation Agreement with Solid Power and BMW, and separately has plans to supply solid-state cells for its Galaxy Ring wearable and other compact electronics in 2026.
The charging performance Samsung SDI is targeting is equally ambitious: from 8% to 80% state of charge in just nine minutes. If that figure holds through to production — a significant if — it would represent a genuine step-change in consumer experience for both EVs and portable electronics. A company of Samsung SDI’s scale that achieves that target at commercial volumes will have changed the rules of the battery market for a generation.
- Technology: Anode-less architecture; proprietary solid electrolyte; target 900 Wh/L
- Key milestone: S-Line pilot production underway; samples delivered to automakers
- Target: Mass production 2027; Phase 1 small-scale in wearables and halo vehicles 2026
- Investment: 354.1 billion KRW committed to domestic SSB line through 2026
7. ProLogium
ProLogium Technology holds a distinction that most of the companies on this list can only aspire to: it was the first company in the world to successfully develop, mass-produce, and sell solid-state lithium ceramic batteries commercially. Based in Taiwan, ProLogium has been in the business for two decades and holds over 650 patents covering its oxide-based solid electrolyte approach. While its competitors are still debating whether solid-state manufacturing is possible at scale, ProLogium operates the world’s first gigafactory for solid-state lithium ceramic batteries in Taoyuan, Taiwan.
That facility, which began supplying automakers in 2024, incorporates continuous wet coating for solid electrolytes and has achieved a production efficiency 2.6 times greater than ProLogium’s earlier facilities, with doubled assembly speed and reduced costs. At CES 2026, the company celebrated its 20th anniversary by unveiling its “Superfluidized All-Inorganic Solid-State Lithium Ceramic Battery” platform and simultaneously announced a partnership with Darfon Energy Tech to introduce solid-state battery solutions for electric bicycles and light electric vehicles — expanding beyond its automotive focus. In May 2025, ProLogium also partnered with Japan’s Kyushu Electric Power to co-develop a 24V lithium ceramic battery module for construction machinery.
ProLogium’s product range spans smart cards, IoT devices, wearables, and EVs — a breadth that gives it revenue streams and production experience that pure EV-focused players lack. Its batteries carry no toxic liquid electrolyte, no leak risk, and no fire risk from thermal runaway. For an industry trying to convince consumers and regulators that next-generation batteries are genuinely safer, ProLogium has the commercial track record to make that argument credibly.
- Technology: Oxide-based (ceramic) solid electrolyte; first-mover in commercial production
- Key milestone: World’s first SSB gigafactory operating in Taoyuan, Taiwan since 2024
- CES 2026: Unveiled 4th-generation Superfluidized All-Inorganic SSB platform
- Partners: Kyushu Electric Power, Darfon Energy Tech; supplying multiple automakers
8. LG Energy Solution
LG Energy Solution is one of the largest battery manufacturers in the world, supplying cells to General Motors, Hyundai, Stellantis, and others from facilities across Asia, North America, and Europe. Its approach to solid-state batteries reflects the calculated caution of a company with an enormous and profitable lithium-ion business to protect. Rather than racing to an early solid-state launch, LG Energy Solution is investing in R&D and pilot production while maintaining its dominant position in the current market.
The company has made no secret of its solid-state ambitions. LG Energy Solution and LG Chem — its parent company’s chemicals arm — are collaborating with the South Korean national consortium that includes Samsung SDI and SK Innovation on next-generation battery research. LG Energy Solution is exploring both semi-solid and fully solid-state electrolyte technologies, building toward a production timeline consistent with the 2027–2030 window that most Korean battery makers are targeting for commercial solid-state EV cells. The company is focusing on semi-solid solutions as a near-term bridge while full solid-state technology matures.
What LG Energy Solution brings to the solid-state race is not the boldest technology claim or the earliest timeline. It brings manufacturing scale, a global customer base, and the financial resources of one of South Korea’s largest conglomerates. In a technology transition that will ultimately be won or lost in the factory rather than the laboratory, those assets are not to be underestimated. The EV solid-state battery market is projected to grow at a 43.11% CAGR through 2031, and LG Energy Solution intends to claim its share.
- Technology: Semi-solid bridge technology + longer-term all-SSB development
- Consortium: Part of South Korean national SSB R&D collaboration with Samsung SDI, SK Innovation
- Target: Commercial SSB production aligned with 2027–2030 Korean industry timeline
- Advantage: Global manufacturing scale; existing relationships with major OEMs
9. Ganfeng Lithium
Ganfeng Lithium occupies a unique position in the solid-state battery ecosystem. Most companies in this space are battery cell manufacturers that must source their lithium and electrolyte materials from outside suppliers. Ganfeng is one of the world’s largest lithium companies, which means it sits upstream in the supply chain of every competitor on this list. Its decision to move into solid-state battery cell production is therefore not just a technology bet — it is a vertical integration strategy that could give it structural cost advantages that pure-play cell manufacturers cannot match.
Ganfeng has made significant investments in solid-state R&D and production infrastructure. The company has been developing solid-state batteries across multiple electrolyte chemistries, including both sulfide and oxide routes. Its flight-series power supply for the low-altitude economy — targeting drones and eVTOL applications — achieves energy densities ranging from 320 Wh/kg to 550 Wh/kg, with a maximum cycle life of 1,000 times. Ganfeng had plans to deliver 500 Wh/kg solid-state battery samples for eVTOL applications in 2025. The company has a complete upstream-to-downstream integrated layout of solid-state batteries, including capabilities in sulfide electrolytes, oxide electrolytes, metal lithium anodes, battery cells, and battery systems.
One important caveat worth noting: some reports of Ganfeng’s “mass production” of solid-state batteries have referred to semi-solid-state products rather than fully all-solid-state cells. The distinction matters technically, though the company’s trajectory toward full solid-state commercialization is clear. Its cooperation with NIO and its EV market applications underline that Ganfeng is not content to remain a raw material supplier — it intends to be a cell company too.
- Technology: Sulfide and oxide electrolytes; full upstream-to-cell vertical integration
- Application: eVTOL and drone power supply: 320–550 Wh/kg, up to 1,000 cycle life
- Advantage: Controls lithium supply chain; structural cost edge over pure-play cell makers
- Key partner: Cooperating with NIO on EV solid-state battery applications
10. Weilan New Energy
Weilan New Energy is the least globally recognized name on this list, and perhaps the most interesting for that reason. A China-based company specializing in solid-state batteries, Weilan has built a strategic partnership with NIO — one of China’s most prominent electric vehicle manufacturers — that positions it as a key supplier for NIO’s next-generation battery ambitions. In a country where the government has made solid-state battery commercialization a national strategic priority, being the preferred battery partner of a major domestic EV maker is a position of considerable commercial leverage.
Weilan’s mass production facility for high-performance solid-state lithium-ion batteries completed the capping of its steel structure main body in 2025 and is expected to begin trial production in 2026. The company has a complete upstream-to-downstream integrated layout covering sulfide electrolytes, oxide electrolytes, metal lithium anodes, battery cells, and full battery systems — a breadth of capability that reflects serious long-term investment rather than a speculative startup posture. Weilan has also launched a flight-series power supply targeting the low-altitude economy, with energy densities from 320 Wh/kg to 550 Wh/kg and a maximum cycle life of 1,000 times.
China’s solid-state battery ecosystem is moving fast. The Chinese government announced that it will publish its first national technical standard for solid-state batteries in 2026, a development that signals the regulatory infrastructure for commercial deployment is being built in parallel with the technology. Weilan New Energy, positioned as a first-mover in domestic Chinese production and embedded in NIO’s supply chain, is structured to benefit directly when that infrastructure locks in.
- Technology: Full SSB stack: sulfide and oxide electrolytes, metal lithium anodes, cells, systems
- Key milestone: Mass production facility steel structure capped 2025; trial production expected 2026
- Key partner: Strategic cooperation with NIO for EV solid-state battery supply
- Market context: China’s first national SSB technical standard expected 2026
What These Ten Companies Have in Common — and What Comes Next
The ten companies profiled here are not simply betting on a technology. They are betting on a timeline — the belief that the engineering, manufacturing, and cost challenges of solid-state batteries can be solved within a window of five to ten years. Each has chosen a different chemistry, a different partner structure, and a different commercial strategy. Toyota is going through Lexus. QuantumScape is licensing its ceramic separator. CATL is straddling the transition with a condensed battery bridge. ProLogium already crossed the bridge.
The global EV solid-state battery market is growing at 43.11% annually through 2031, from $372 million in 2026 to a projected $2.23 billion. The broader solid-state battery market, including consumer electronics, medical, aerospace, and grid storage applications, is estimated at $2.3 billion in 2026 overall. The companies that secure the best manufacturing processes, the most reliable supply chains, and the earliest commercial relationships with major automakers will not just profit from that growth — they will define the energy architecture of the next half-century.
The house bets have been placed. The factory floors are being built. The race — quiet, expensive, and consequential — is already well underway.
FAQs
Toyota holds the largest patent portfolio by far — over 1,000 solid-state battery patents globally — and received production approval in Japan in October 2025 for a 2027 Lexus launch. However, ProLogium is the only company operating a commercial solid-state battery gigafactory, supplying products today. QuantumScape leads in terms of Western investor attention and advanced cell performance metrics. The honest answer is that the race has different leaders in different dimensions: patents, production, and cell performance are three separate contests.
The clearest timeline as of 2026: Toyota targets Lexus integration in 2027, with broader mass production in 2027–2028. Samsung SDI and CATL both target small-scale all-solid-state production for 2027, with mass production and broader application from 2028 to 2030. QuantumScape’s Eagle Line is supporting customer vehicle launches targeted for 2026 in low-volume demonstration programs. Cost parity with lithium-ion — the point at which mass-market adoption accelerates — is expected around 2028–2030.
Toyota began its solid-state battery research program in 2010 — roughly five to seven years before most competitors treated it as a serious commercial priority. The company also benefits from Japan’s collaborative research culture, where automakers, materials companies, and government agencies co-develop and co-patent technology. Toyota’s 2011 breakthrough in partnership with the Tokyo Institute of Technology, developing a lithium superionic conductor, gave it an early technical lead that it has compounded through sustained investment. Over the past three years alone, Toyota registered over 8,000 new solid-state battery patents.
Manufacturing at scale and at competitive cost. Sulfide solid-state cells currently cost three to five times more per kWh than conventional lithium-ion cells. The precision required in assembly — controlling moisture, contamination, and pressure during lamination — makes yield rates on early production lines imperfect. Lithium dendrite formation, where thin lithium filaments can pierce a solid electrolyte and cause short circuits, remains an active engineering challenge. Every company on this list is working on those problems, but none has fully resolved them at gigawatt-hour production scale.
Japan leads in patent depth and has the most organized corporate-government-academic collaboration, anchored by Toyota, Panasonic, and the national Libtec consortium. China leads in manufacturing speed and scale ambition, with CATL, Ganfeng, and Weilan all building production capacity aggressively, backed by government industrial policy. China’s first national technical standard for solid-state batteries is expected in 2026, which will accelerate domestic deployment timelines. Asia as a whole leads approximately 70% of global solid-state battery R&D, with the US and Europe investing heavily to close the gap.
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