EV battery technology: innovations in range, chemistry and solid-state batteries

EV battery technology refers to the different components and systems that enable a battery pack to store and deliver energy safely.

An EV battery is a collection of individual cells grouped into modules, which are assembled into a pack beneath the vehicle floor. There are different types of batteries available, but the most common, lithium-ion, has dominated the market as it delivers a strong balance of energy density, rechargeability and cost that cannot be matched at scale.

Equally important is the battery management system (BMS), the software layer that regulates temperature, monitors charge state and protects the pack from damage.

BMS improvements are one reason battery degradation rates have fallen. Geotab's 2024 analysis of nearly 5,000 EVs found an average degradation rate of just 1.8% per year, much lower than many consumers expect.

Most EVs on the road today use one of two dominant EV battery chemistries: LFP and NMC. Each has its own advantages and disadvantages.

The lithium iron phosphate (LFP) battery has quickly become one of the most widely used chemistries across the industry. Its cathode uses iron and phosphate, which are both abundant and affordable materials.

Key advantages:

• Lower cost per kWh than NMC 
• Cycle life of 3,000–5,000 full charge cycles before capacity drops to ~80% 
• Highly thermally stable, with significantly lower thermal runaway risk 

The trade-off is energy density. LFP cells store less energy per kilogram, meaning larger packs are needed for equivalent range. Cold-weather performance also drops more noticeably than NMC. Innovations like BYD's Blade Battery have narrowed the gap at pack level, but differences remain.

Nickel manganese cobalt (NMC) batteries are often the chemistry of choice for long-range and premium EVs due to the higher energy density they offer. This can provide meaningful range advantages over LFP, alongside better cold-weather performance and faster charging.

However, NMC packs cost more to produce, largely due to the cobalt used. Manufacturers such as CATL and LG are working to mitigate this by reducing cobalt content.

Neither chemistry is universally better. For fleet operators, the decision should be driven by the balance of range requirements, utilisation rate and total cost of ownership.

Electric vehicle battery range has improved substantially over the past decade, and the trend is continuing. According to SMMT data, the average real-world range of a new BEV in the UK stood at 236 miles as of 2024. That figure reflects gains across multiple areas, such as better cell chemistry, smarter pack architecture and increasingly sophisticated software.

• Energy density gains: refined cathode and anode materials store more energy in the same physical space 
• Cell-to-pack (CTP) architecture: eliminating the module layer packs more capacity into the same footprint 
• Structural battery packs: where the battery forms part of the vehicle chassis, reducing dead weight 
• Smarter BMS software: real-time optimisation of charging curves and cell balancing, with some manufacturers pushing improvements via over-the-air updates 

The solid-state EV battery could represent the most significant leap in EV battery innovation. At its core, solid-state batteries replace the liquid electrolyte in a conventional battery cell with a solid material, such as ceramic, glass or polymer. This change can present several advantages, including higher energy density, reduced fire risk, and the potential for faster charging and longer cycle life.

There has been progress in recent years. In February 2025, Mercedes-Benz became on of the first manufacturers to put a lithium-metal solid-state battery into a production vehicle for road testing. A prototype EQS equipped with the technology drove 749 miles on a single charge in a September 2025 real-world test.

Other manufacturers are also in development, with Toyota targeting mass production from 2027–2028, and Nissan and Stellantis both running prototype programmes.

The challenges are also significant. Production costs remain far above conventional lithium-ion, estimated at £300-600 per kWh compared to around £91 per kWh for lithium-ion. Manufacturing at scale requires precision engineering that existing production lines cannot easily accommodate, meaning mainstream deployment will likely fall into the 2030s.

Several other innovations are advancing alongside solid-state development.

Silicon anode technology is a major area of focus. Silicon can theoretically store around ten times more lithium than graphite, and silicon-enhanced anodes are already entering commercial use.

Sodium-ion batteries use sodium rather than lithium, which is a more abundant and significantly cheaper material. As of 2025, sodium-ion production remains low, but the direction is clear. The technology is best positioned for affordable urban and short-range EVs rather than long-range applications.

Cobalt-free formulations are also in development across the industry. Nissan's solid-state programme is targeting a sulphur-manganese cathode that would eliminate cobalt entirely. High-nickel NMC variants are already reducing cobalt dependency in current production batteries.

Together, these shifts point towards a future EV battery landscape that is cheaper to produce, less exposed to critical mineral supply risk, and capable of delivering faster charging alongside greater range.

EV battery technology is evolving faster than many in the industry expected, and the improvements are not incremental. Better chemistries, smarter management systems, falling costs and next-generation materials like solid-state and silicon anodes are collectively removing the limitations of EV batteries. For fleet operators, OEMs and the wider UK automotive sector, the direction towards electrification is clear, and the technology is increasingly ready to support this transition.

Explore further electric vehicle insights in our EV Hub.