A battery storing about 3,505 watt-hours per kilogram would, on paper, carry an electric car 2,000 km, or 1,243 miles, on one charge. That is the arithmetic circulating after reports that CATL, the world’s largest EV battery maker, is looking at lithium-air chemistry. No cell has delivered anything close to it, and CATL itself has not promised it.
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Lithium-air cells breathe oxygen from the surrounding air, so the positive electrode does not have to carry its reactants inside the pack. The pitch is pure lithium metal on one side and the atmosphere on the other, with no nickel, cobalt or manganese cathode host. For scale, the Environmental Protection Agency reported average new-EV range of 292 miles in 2024, so the on-paper figure is more than four times that.
Wu Kai’s remarks at the Equipment Power Forum
CATL’s role is narrower than the range figure suggests. Charged EVs reported in June that Wu Kai, CATL’s chief scientist, named lithium-air as the primary focus of the company’s long-term battery research at the 2026 Equipment Power Forum. Nothing in that coverage gives a commercialization date, and the same report says CATL has already put sodium-ion packs into EVs from GAC and Changan, which shows where the company’s production effort currently sits.
The 2,000 km number arrived later. CarNewsChina’s Adrian Leung wrote on Nov. 7 that both the 2,000 km claim and a “five times solid-state” energy-density claim trace to a report from the Chinese outlet IT Home, and that CATL has not announced a 2,000 km production-car target or a launch schedule. Autoblog’s Rex Sanchez repeated the range on Nov. 8 and labeled it theoretical, not demonstrated or officially confirmed.
3,505 versus 12,000 watt-hours per kilogram
Two different theoretical numbers float around the topic. According to CarNewsChina, 3,505 Wh/kg is the figure for the lithium-peroxide reaction when the mass of oxygen is counted, while roughly 12,000 Wh/kg results when oxygen mass is left out. Interesting Engineering presents the 12,000 figure as matching gasoline and sets it beside about 250 to 270 Wh/kg for current lithium-ion and about 500 Wh/kg expected from solid-state cells. Charged EVs gives the same comparison in joules: about 40 MJ/kg for a non-aqueous lithium-air cell against about 47 MJ/kg for gasoline, with a cell-level laboratory demonstration at 6.12 MJ/kg.
Laboratory results so far sit far below the paper figures. CarNewsChina lists a Jilin University and Chinese Academy of Sciences pouch cell from 2024 at 757.5 Wh/kg that lasted 241 cycles. A solid-electrolyte design from Illinois Institute of Technology and Argonne National Laboratory, described by Charged EVs in 2025, was recharged for at least 1,000 cycles at room temperature and could reach a specific energy of 1,200 Wh/kg with further development, a projection rather than a result.
The history is sobering too. IBM set a Battery 500 goal in 2009 of 805 km, or 500 miles, and the program never produced a commercial battery. Lithium-air range projections of this size have circulated for well over a decade, and the distance between the chemistry’s theoretical limit and anything a customer can buy has not closed.
So could a battery really go 1,243 miles? The sources read for this article say the number describes chemistry on a spreadsheet, not a cell on a bench. Even the strongest laboratory design they mention, the 1,000-cycle Illinois Institute of Technology and Argonne cell, projects 1,200 Wh/kg, about a third of the 3,505 Wh/kg theoretical figure, and that projection depends on further development.
Moisture, carbon dioxide and the cycle-life wall
The obstacles are chemical. Open-cell designs that pull in ambient air degrade quickly when exposed to moisture and carbon dioxide, catalysts behave unpredictably, and cycle life is short. Earlier chemistries formed lithium superoxide or lithium peroxide, which cut efficiency. Autoblog adds that recharging may demand substantial energy and that the air-handling and cooling hardware adds complexity and weight. CarNewsChina cites a 2023 study in the Journal of Energy Storage in which supporting equipment would consume 5.4% of battery power in a vehicle.
Autoblog sets the claim against what is on sale: the Lucid Air Grand Touring has the longest range of any American EV at up to 512 miles per the EPA and starts at $114,900, while the Chevrolet Silverado EV offers more than 400 miles, with the 2027 LT Extended Range starting at $72,695. CATL also has a technology-licensing partnership with Ford to make LFP batteries in the United States, a reminder that its commercial work today is in proven chemistries.
CATL’s nearer-term bets look different. Interesting Engineering notes sodium-ion packs already ride in the GAC Aion UT and Changan Oshan 520, and the stated lithium-air targets are heavy-duty transport and stabilizing solar and wind grids rather than passenger cars. That ordering matters for readers weighing the 1,243-mile figure: the company’s own stated priorities put sodium-ion and all-solid-state cells closer to mass production than any air-breathing cell.
The gap between 241 cycles in a 2024 pouch cell and a commercial vehicle pack is the open question. None of the sources read for this article gives a date for closing it.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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