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Batteries & EVs: Chemistry, Costs and Carmaker Plans

Battery chemistry explained, from solid-state and sodium-ion to LFP and silicon anodes, plus sourced coverage of EV prices, charging and carmaker strategy.

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This section starts with the battery. Its chemistry shapes what an electric vehicle costs, how far it drives and how well it copes with cold. Coverage begins with the lithium iron phosphate (LFP) and nickel-based cells in today's cars. It runs on to the sodium-ion packs now being scaled up in China and to silicon anodes. It also takes in the solid-state designs that companies have been promising for years. From there it follows the EV market itself: prices, charging and carmaker strategy.

The International Energy Agency (IEA) says electric car sales passed 20 million in 2025, a quarter of all new cars sold. It expects about 23 million in 2026. Both figures come from its Global EV Outlook 2026, published in May 2026. The agency said high oil prices at the time were drawing consumers' attention to the lower running costs of EVs. Batteries have been getting cheaper too. Average lithium-ion pack prices fell 8% in 2025 to a record low of $108 per kilowatt-hour, BloombergNEF's annual price survey found in December 2025. The research firm credited manufacturing overcapacity, competition and a shift to low-cost LFP. The IEA says LFP made up more than 55% of EV batteries deployed that year.

Supply is concentrated. China accounted for over 80% of battery cell production in 2025, the IEA says, and leading producers CATL and BYD are scaling up sodium-ion. Toyota, Samsung, BYD and U.S. developers such as QuantumScape are working toward solid-state cells. In May 2026 the IEA still classed the fully solid designs as prototypes, though semi-solid versions were already commercial. Battery announcements often run ahead of factories. So articles here separate lab results, pilot lines and mass production. They attribute launch dates to the companies that set them.

Batteries & EVs reference

Batteries & EVs: common questions

Are solid-state batteries available yet?
Not the fully solid kind. In its May 2026 Global EV Outlook, the International Energy Agency said all-solid-state cells were still prototypes, made at small scale for testing. It said semi-solid-state versions were already commercial. Toyota says it is aiming for a first launch in 2027-28. The agency says BYD plans a first model from 2027 and mass production from 2030. The agency expects the technology to stay in premium segments until the first half of the 2030s.
How long do EV batteries last?
Often longer than the warranty, modeling suggests. The U.S. Department of Energy cites predictive modeling by the National Laboratory of the Rockies. The department says today's EV batteries may last 12 to 15 years in moderate climates and 8 to 12 years in extreme ones. Several manufacturers offer battery warranties of 8 years or 100,000 miles. Climate, driving and charging patterns, cell chemistry and thermal management all affect lifespan.
Are EVs cheaper than gas cars?
It depends on the market. The International Energy Agency found that nearly 70% of battery electric cars sold in China in 2025 were cheaper than their combustion equivalents, even before incentives. In Germany the average price premium was around 20%. In the United States battery electric SUVs cost under 25% more than combustion SUVs. The agency says electric cars usually cost less to run, mainly because they use energy more efficiently.
Are EVs actually better for the environment?
On greenhouse gas emissions, life-cycle analysis indicates yes, at least in Europe. A July 2025 study by the International Council on Clean Transportation looked at medium-segment battery electric cars sold in the European Union in 2025. It estimated they will emit 73% less over their lifetime than gasoline cars, counting vehicle and battery production. Building an EV produces about 40% more emissions, which the study says is offset after roughly 17,000 kilometers of driving.

Sources