Hydrogen Cars: Clean Technology Hindered by Storage and Cost Issues

Hydrogen Cars: Clean Technology Hindered by Storage and Cost Issues. Hydrogen-powered cars offer a driving experience with zero greenhouse gas emissions at the point of use, but their deployment remains very limited—only two main commercial models are available in limited quantities worldwide as of 2024. Hydrogen production still mostly relies on natural gas, not sustainable sources, while refueling station infrastructure and production costs remain major barriers. Comparison with battery electric vehicles reveals fundamental differences in energy logistics, not just performance.. What Is a Hydrogen Car — Not 'Burning Hydrogen', But Converting Chemistry into Electricity Hydrogen cars are not vehicles that burn hydrogen gas like a conventional petrol engine. Instead, they are electric vehicles—but with a unique energy source: a fuel cell. Inside the fuel cell, hydrogen H₂ from the tank reacts with oxygen O₂ from the air to produce electric current, water H₂O , and heat. This current then drives an electric motor that powers the wheels. This process produces no carbon dioxide or particulate matter—only water vapor comes out of the exhaust. This makes it zero-emission at point of use , a critical feature in efforts to reduce urban air pollution. However, it is important to emphasize: 'zero-emission' is only valid if the hydrogen itself is produced cleanly—a condition that has not been predominantly met globally. Two Main Global Players: Toyota Mirai and Hyundai Nexo As of 2024, only two hydrogen car models have reached full commercialization for the public market: Toyota Mirai introduced in 2014, second generation launched in 2020 and Hyundai Nexo 2018 . Both are fuel cell electric vehicles FCEVs , not hybrids or internal combustion vehicles. The second-generation Mirai offers a range of up to 650 km according to the WLTP standard, with a refueling time of only 3–5 minutes—a major advantage over battery charging which takes 30 minutes to several hours. The Nexo features an advanced air purification system capable of cleaning 2.5 million liters of air per hour while driving—an additional function rarely found in conventional vehicles. In early 2024, Honda launched the CR-V e:FCEV, but only in limited lease form in California, showing how narrow the FCEV market remains even after more than a decade of development. The Shadow of Production: 98% of Hydrogen Is Still 'Grey' A fact often hidden in the 'green' hydrogen narrative is how it is produced. According to 2019 data from the International Energy Agency IEA , 98% of global hydrogen is produced through steam methane reforming SMR —decomposing natural gas methane, CH₄ with steam at high temperatures. This process emits between 9–12 kg of CO₂ for every kilogram of hydrogen produced. This type of hydrogen is called 'grey hydrogen'. To be truly clean, hydrogen must be produced through water electrolysis using electricity from renewable sources—which currently contributes less than 1% of global hydrogen production. This electrolysis-produced hydrogen is called 'green hydrogen'. Without a major shift towards green hydrogen, the climate benefits of hydrogen cars remain limited—because actual emissions are merely shifted from the vehicle exhaust to the gas plant chimney. Infrastructure: Refueling Stations Rarer Than Petrol Stations in Sabah At the end of 2023, the total number of hydrogen refueling stations for public vehicles worldwide was still less than 1,000 units—about 0.3% of the number of petrol stations in Malaysia alone. In Japan, a pioneer FCEV country, there are about 160 stations; in Germany, around 100; in the United States, about 60—and all are concentrated in specific regions such as California. In Southeast Asia, there is not a single fully operational hydrogen refueling station for public vehicles. This comparison highlights a technical reality: hydrogen is difficult to store and transport. Its molecule is the smallest in the chemical elements, easily permeates metal and polymer materials, and requires extreme pressure 700 bar or cryogenic temperatures −253°C to be compressed—both requiring expensive and complex technology. As an illustration, one 700-bar hydrogen tank with a capacity of 5 kg requires a tank structure weight of more than 100 kg, while an equivalent energy capacity lithium-ion battery weighs only about 30–40 kg. Where Does It Fit in the Future Mobility Ecosystem? Hydrogen cars are not direct competitors to battery electric vehicles BEVs in the individual passenger segment—they are more suitable for heavy and long-range applications: city buses, long-distance delivery trucks, trains without rail electrification, and ships. In Japan, a prototype hydrogen-powered ferry is being tested; in Europe, the Coradia iLint train project has been operating since 2018 in Germany with a range of 1,000 km on a single fill. An important reflective question arises: Do we need multiple low-carbon mobility solutions—or should limited resources be focused on one more mature and efficient technology? The answer is not absolute. What is certain is that hydrogen cars are not a 'magic solution', but a specific component in the decarbonization portfolio—with great potential, yet will only shine when three pillars are simultaneously strong: cheap green hydrogen production, reliable distribution infrastructure, and economies of scale that lower fuel cell system costs. Without that, it remains an elegant technology traveling on empty roads. --- Reference: Hydrogen vehicle — Wikipedia https://en.wikipedia.org/wiki/Hydrogen vehicle