Nissan Achieves Critical Solid-State Battery Milestone as Global Race for 600-Mile Range EVs Intensifies

Nissan Motor Corporation has announced a significant breakthrough in the development of all-solid-state batteries, marking a pivotal step toward its goal of launching mass-produced electric vehicles powered by the next-generation technology by 2028. During a comprehensive technical briefing held in late April, the Japanese automaker confirmed that it has successfully produced a prototype battery pack consisting of 23 stacked layers, or cells. This specific configuration is considered a critical threshold for practical vehicle applications, as it demonstrates the scalability and stability required for the high-capacity demands of modern passenger cars.

In addition to the physical stacking milestone, Nissan engineers verified that the prototype has met rigorous performance targets for both charging and discharging cycles. This confirmation provides the technical validation necessary to move from laboratory-scale testing to the pilot production phase. The development is part of Nissan’s broader "Ambition 2030" vision, which seeks to reclaim the company’s position as a global leader in electrification—a status it first established with the launch of the Nissan LEAF in 2010 but has since faced fierce competition from both established Western manufacturers and emerging Chinese rivals.

Technical Milestones and the Path to Mass Production

The transition to all-solid-state batteries (ASSBs) is widely regarded as the "holy grail" of the automotive industry. Unlike conventional lithium-ion batteries, which utilize a liquid electrolyte to move ions between the anode and cathode, ASSBs use a solid material. This fundamental shift in chemistry offers three primary advantages: significantly higher energy density, faster charging capabilities, and enhanced safety due to the lack of flammable liquid components.

Nissan’s recent success with the 23-layer stack addresses one of the primary hurdles in ASSB development: internal resistance and physical integrity. As battery layers are stacked to increase voltage and capacity, maintaining consistent contact between solid components becomes increasingly difficult. Nissan’s ability to meet charge and discharge targets at this scale suggests that its proprietary manufacturing techniques are overcoming the interface challenges that have historically plagued solid-state research.

The company has already laid the groundwork for large-scale manufacturing. In January 2025, Nissan officially opened its all-solid-state battery production line at its Yokohama plant in Japan. This facility serves as a pilot plant where engineers are refining the assembly process before the technology is integrated into a full-scale factory. A key component of this manufacturing strategy is Nissan’s partnership with LiCAP Technologies, a U.S.-based firm specializing in electrode manufacturing.

The Role of Dry Electrode Technology in Cost Reduction

One of the most innovative aspects of Nissan’s roadmap is the integration of LiCAP’s "Activated Dry Electrode" technology. Traditional battery manufacturing relies on a "wet" process, where active materials are mixed into a slurry using toxic solvents like N-Methyl-2-pyrrolidone (NMP). This slurry is coated onto metal foils and then passed through massive, energy-intensive drying ovens that can be hundreds of feet long. The solvents must then be recovered and recycled, adding significant cost and environmental footprint to the production process.

By contrast, the dry electrode process eliminates the need for solvents and drying ovens entirely. The active materials are compressed into a film and bonded directly to the current collector. Nissan has stated that this technology offers a "significant advantage" in its quest to reduce the cost of electric vehicles. By streamlining the production line, Nissan aims to bring the cost of solid-state battery packs down to approximately $75 per kilowatt-hour (kWh) by 2028, with a long-term goal of reaching $65 per kWh. At these price points, electric vehicles would achieve price parity with internal combustion engine (ICE) vehicles, removing one of the final barriers to mass adoption.

Chronology of Nissan’s Solid-State Development

The journey toward the 2028 launch has been a multi-year endeavor characterized by steady incremental gains.

• November 2021: Nissan unveils its "Ambition 2030" long-term vision, officially announcing its intent to develop all-solid-state batteries in-house.
• April 2022: The company reveals its initial prototype production facility for solid-state cells at the Nissan Research Center in Kanagawa Prefecture.
• Summer 2023: Christop Ambland, Nissan’s Director of Product Planning in Europe, confirms to industry outlets that the first vehicle platforms designed specifically for ASSB integration are on track for a 2028 debut.
• January 2025: The Yokohama pilot production line becomes operational, shifting the focus from laboratory research to manufacturing scalability.
• April 2025: Nissan confirms the 23-layer milestone and the success of charge/discharge testing, signaling that the core chemistry is ready for vehicle integration testing.

Performance Expectations: 600 Miles and Beyond

While Nissan has been cautious about releasing specific technical specifications for its 2028 models, industry analysts and internal reports suggest a transformative leap in performance. Current high-end lithium-ion batteries typically offer an energy density of around 250 to 300 Wh/kg. Nissan’s ASSB technology is expected to nearly double this figure, potentially reaching 450 to 500 Wh/kg.

This increase in energy density translates directly to driving range. Projections indicate that Nissan’s solid-state EVs could achieve a range of over 1,000 kilometers (approximately 620 miles) on the Worldwide Harmonized Light Vehicles Test Procedure (WLTP) cycle. Even under the more stringent U.S. EPA rating system, a range exceeding 600 miles appears feasible. Furthermore, the solid electrolyte allows for much higher thermal stability, which facilitates ultra-fast charging. It is estimated that solid-state batteries could charge from 10% to 80% in one-third of the time required by current liquid-electrolyte batteries, potentially bringing "refueling" times down to under 15 minutes.

The Global Competitive Landscape

Nissan is far from alone in its pursuit of solid-state technology. The race has become a geopolitical and corporate battleground, with Japanese, Chinese, and Western firms competing for dominance.

In China, manufacturers such as Nio and IM Motors have already begun deploying "semi-solid-state" batteries. These hybrid designs use a solid electrolyte but retain a small amount of liquid or gel to improve ion conductivity. Nio’s 150 kWh semi-solid-state pack recently enabled a prototype to travel over 1,000 kilometers on a single charge in a real-world test. However, these batteries remain expensive and are currently produced in limited volumes.

Meanwhile, in the United States, Factorial Energy is working closely with Mercedes-Benz, Stellantis, and Hyundai. In September 2024, Mercedes-Benz showcased a modified EQS sedan that utilized Factorial’s "Solstice" solid-state cells, achieving a range of over 745 miles. Factorial’s CEO, Siyu Huang, has suggested that their technology could see commercial application as early as 2027, potentially beating Nissan to market by a year.

Toyota, Nissan’s primary domestic rival, has also been vocal about its solid-state ambitions. Toyota holds the largest number of solid-state battery patents globally and has partnered with energy giant Idemitsu Kosan to commercialize the technology by 2027 or 2028. The intense competition underscores the high stakes; the first company to successfully mass-produce affordable, durable solid-state batteries will likely dictate the standards for the next decade of automotive engineering.

Broader Implications for the Automotive Industry

The successful deployment of solid-state batteries by Nissan and its peers would have profound implications for the global economy and the environment. Beyond the immediate benefits of range and charging speed, the shift toward ASSBs could fundamentally alter the battery supply chain.

Many solid-state designs aim to reduce or eliminate the use of cobalt, a mineral associated with significant ethical and environmental concerns in mining regions like the Democratic Republic of Congo. Furthermore, the increased safety profile of solid-state batteries reduces the need for complex and heavy liquid cooling systems within the vehicle, allowing for lighter car designs and more interior space for passengers.

However, challenges remain. The transition to mass production requires entirely new factory layouts and specialized equipment. There are also concerns regarding the long-term durability of solid-state cells, particularly their tendency to form "dendrites"—microscopic, needle-like structures that can grow through the solid electrolyte and cause short circuits. Nissan’s 23-layer milestone is a sign that these issues are being managed, but only years of real-world driving will prove if the technology can survive the decade-long life cycle expected of a modern automobile.

As Nissan prepares for the 2028 launch, the automotive world is watching closely. The company that once pioneered the mass-market EV with the LEAF is now betting its future on a technology that could finally make range anxiety a thing of the past. If Nissan can deliver on its promise of a 600-mile, fast-charging, and affordable electric vehicle, it may not only secure its own future but also accelerate the global transition away from fossil fuels more rapidly than previously thought possible.