Regan Brown
Hydrogen fuel cell cars are vehicles that use hydrogen and oxygen to generate electricity and power their electric motors. They are considered zero-emission vehicles as they emit only water vapour and no harmful exhaust. Hydrogen fuel cell cars have been available since 2014, with the Hyundai ix35 FCEV being the first mass-produced model. As of 2021, there were only two models of hydrogen fuel cell cars publicly available: the Toyota Mirai and the Hyundai Nexo. However, the Honda CR-V e:FCEV became available for lease in limited quantities in 2024. Hydrogen fuel cell cars offer several advantages, such as reduced emissions, higher energy efficiency than combustion engines, and shorter refuelling times compared to electric vehicles. However, they also face challenges, including the limited hydrogen fuelling infrastructure and the higher cost compared to other zero-emission technologies.
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What You'll Learn
- Hydrogen fuel-cell vehicles are zero-emission vehicles
- Hydrogen cars are eligible for a rebate from California's Clean Vehicle Rebate Project
- Hydrogen fuel cells can be used to provide auxiliary power for aircraft
- Hydrogen fuel-cell vehicles are more expensive than comparable e-cars
- Hydrogen fuel-cell vehicles are safe, smooth, quiet, and peaceful to drive
Hydrogen fuel-cell vehicles are zero-emission vehicles
Hydrogen fuel-cell vehicles (HFCVs) are indeed zero-emission vehicles. They emit only water vapour and heat as byproducts, with no harmful exhaust from their tailpipes. This makes them similar to electric vehicles (EVs) in terms of their environmental impact. However, unlike EVs, HFCVs do not suffer from long charging times, taking just five minutes to refuel for another 300-400 miles of driving.
HFCVs have some of the same positive features as EVs. They are smooth, quiet, and peaceful to drive. They also have regenerative braking to recapture wasted energy as the car slows down. However, they are not as powerful as some EVs, with the best-selling hydrogen car in the US, the Toyota Mirai, rated at 90 kW (120 horsepower). This is not enough to accelerate onto a fast-moving highway, so Toyota adds a high-voltage, low-capacity battery to the car, similar to those in EVs.
HFCVs are widely considered as safe as any other car. The high-pressure hydrogen tanks are designed to survive even the highest-speed crashes without leaking or breaching. However, the availability of hydrogen fuel is a challenge for HFCV drivers. In the US, as of 2020, there were fewer than 50 hydrogen fuelling stations for automobiles, with most of these located in California. The creation of a brand-new fuelling network has proven problematic and expensive, and hydrogen fuel is much pricier for drivers than gasoline or electricity.
Despite these challenges, hydrogen has the potential to meaningfully reduce greenhouse gas emissions in the transportation sector. Hydrogen is abundant in the universe and has a high energy content by weight. As hydrogen infrastructure scales up, costs are expected to drop and become more competitive with other energy sources. Hydrogen fuel cells also have applications beyond cars, including in aircraft, boats, forklifts, buses, and material handling vehicles.
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Hydrogen cars are eligible for a rebate from California's Clean Vehicle Rebate Project
Hydrogen fuel cell vehicles (HFCVs) are a type of zero-emission vehicle that emits only water vapour from its tailpipe. They are powered purely by electricity and are similar to battery-electric vehicles in terms of driving experience, but differ in that they do not have a transmission and have regenerative braking. HFCVs are widely considered to be as safe as any other car, and their fuel cells can provide a steady power output, making them suitable for backup power use.
As of 2021, there were only two models of fuel cell cars publicly available: the Toyota Mirai and the Hyundai Nexo. The Honda Clarity was produced from 2016 to 2021 and the Honda CR-V e:FCEV became available for lease in very limited quantities in 2024. The main challenge for the widespread adoption of HFCVs is the availability of hydrogen fuel. While California had planned to have 100 hydrogen stations by 2022, there were fewer than 60, and this number is not growing quickly.
Despite this, hydrogen cars are eligible for a rebate from California's Clean Vehicle Rebate Project (CVRP). The CVRP offered rebates of up to $7,500 for the purchase or lease of new, eligible zero-emission vehicles. The CVRP closed on November 8, 2023, and does not plan on reopening. However, there are other grants and rebates available for clean cars in California, such as the Clean Air Vehicle (CAV) program, which provides a decal for single occupancy use of High Occupancy Vehicle (HOV) lanes, and the PG&E Pre-Owned Electric Vehicle program, which offers incentives of up to $4,000 for the purchase or lease of a pre-owned electric or plug-in hybrid vehicle.
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Hydrogen fuel cells can be used to provide auxiliary power for aircraft
Hydrogen fuel cells are being used to power vehicles, including cars, boats, buses, forklifts, and submarines. Hydrogen fuel cells are also being used to provide auxiliary power for aircraft, replacing fossil fuel generators used to start engines and power onboard electrical needs.
The world's first fuel cell boat, HYDRA, used an AFC system with a 6.5 kW net output. Fuel cell engines have higher energy efficiency than combustion engines, resulting in better range and significantly reduced emissions. Similarly, hydrogen fuel cells can be used to power aircraft, providing several benefits over traditional fossil fuel engines.
Hydrogen fuel cells can generate electricity through an electrochemical reaction, making them a clean source of power. Hydrogen fuel cells that use pure hydrogen are carbon-free, producing zero emissions. This can significantly reduce the environmental impact of aviation, as hydrogen can be produced from low-carbon power sources such as wind or nuclear energy.
Airbus, for example, is working on its ZEROe concept aircraft, which is expected to use hydrogen fuel cells to generate electrical power alongside modified gas-turbine engines. This hybrid-electric propulsion system is predicted to be highly efficient. Hydrogen fuel cells could be a viable alternative to battery-powered propulsion, as they can generate significantly more power and energy for a given weight, making them suitable for larger aircraft over longer distances.
While hydrogen-powered aircraft are still in development, studies suggest that they could be commercially viable for short-haul and regional flights in the near future. Hydrogen-powered aircraft with hybrid fuel cell/turbine systems are projected to reduce climate impact by 70-80% for a 20-30% additional cost. However, research and development are needed to address challenges related to hydrogen infrastructure, regulations, and certification standards.
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Hydrogen fuel-cell vehicles are more expensive than comparable e-cars
Hydrogen fuel-cell vehicles are a type of electric car, but they differ from battery-powered electric cars in that they produce their own electricity. Hydrogen fuel cells convert hydrogen in the fuel tank into electricity, which then powers the vehicle's electric motor. This is in contrast to electric cars, which rely on a rechargeable battery pack that is charged by plugging into the electric grid.
While hydrogen fuel-cell vehicles offer certain advantages over battery-powered electric cars, such as faster refuelling times and longer ranges, they are currently more expensive. As of 2021 and 2022, there were only two hydrogen fuel-cell car models publicly available in select markets: the Toyota Mirai and the Hyundai Nexo. These cars start at around $50,000 and $60,000, respectively, which is significantly higher than the price of most electric vehicles.
The high cost of hydrogen fuel-cell vehicles can be attributed to several factors. Firstly, industrialization in production is not yet fully developed, which keeps production volumes low and contributes to higher costs. Additionally, the demand for platinum, a precious metal used as a catalyst in electricity generation, also drives up costs. While the amount of platinum needed for automotive fuel cells has been reduced, it still plays a significant role in the overall cost.
Another factor contributing to the higher cost of hydrogen fuel-cell vehicles is the limited hydrogen infrastructure. As of 2020, there were fewer than 50 hydrogen fuelling stations publicly available in the US, with most of them located in California. The scarcity of hydrogen fuel stations not only affects the convenience of owning a hydrogen fuel-cell vehicle but also contributes to higher fuel costs. Hydrogen fuel has historically been priced at about $20 per kilogram, but supply chain disruptions have recently driven prices up to $36 per kilogram in some areas.
While the cost of hydrogen fuel-cell vehicles is currently higher than comparable e-cars, there is potential for this to change in the future. Increased production volumes and advancements in hydrogen production methods could lead to lower prices for hydrogen fuel-cell vehicles, making them more competitive with electric vehicles. However, as of now, the high costs remain a significant barrier to the widespread adoption of hydrogen fuel-cell technology in the automotive industry.
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Hydrogen fuel-cell vehicles are safe, smooth, quiet, and peaceful to drive
Hydrogen fuel-cell vehicles (HFCVs) are considered safe, with high-pressure hydrogen tanks designed to withstand even the most severe crashes without leaking or breaching. While critics have raised concerns about the safety of hydrogen, particularly in light of the Hindenburg disaster in 1937, hydrogen tanks have been built to be durable and safe. Indeed, no injuries or fatalities related to the hydrogen components have been reported in the relatively small number of HFCVs sold so far.
HFCVs offer a smooth driving experience, similar to that of electric vehicles (EVs). They are powered by an electric motor, with the fuel cell providing electricity to the motor and/or charging a small "buffer" battery. This battery is constantly recharged by the fuel cell and helps provide additional power during acceleration. However, hydrogen fuel cells operate optimally at a steady power output, which can pose a challenge for automotive engineers.
One of the standout features of HFCVs is their quietness. With no combustion engine, HFCVs produce significantly less noise than traditional cars, contributing to a peaceful driving experience. This reduction in noise pollution is beneficial, particularly in urban areas.
HFCVs are also highly efficient, with a shorter refuelling time than EVs. A five-minute refuelling can provide a range of 300 to 400 miles, comparable to conventional cars. However, the availability of hydrogen fuel remains a challenge, with a limited number of hydrogen refuelling stations, particularly outside of California.
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Frequently asked questions
Yes, there are cars that contain fuel cells. As of 2021, there were only two models of fuel cell cars publicly available: the Toyota Mirai and the Hyundai Nexo. However, other models have been produced, such as the Honda Clarity (2016-2021) and the Honda CR-V e:FCEV (available for lease since 2024).
Hydrogen fuel cell cars are powered by compressed hydrogen gas. The hydrogen gas is fed into an onboard fuel cell stack that transforms the fuel's chemical energy into electrical energy, powering the car's electric motors. The tailpipe emissions are zero, and the only waste produced is pure water vapour.
Hydrogen fuel cell cars have several advantages. They produce zero tailpipe emissions, making them environmentally friendly and ideal for reducing air pollution in cities. They also have a longer range than electric vehicles and can be refuelled quickly, making them more convenient for long-distance travel. Additionally, they are smooth, quiet, and pleasant to drive, similar to electric vehicles.
One of the main disadvantages of hydrogen fuel cell cars is the limited availability of hydrogen fuel. As of 2020, there were fewer than 50 hydrogen fuelling stations in the US, with most of them located in California. The high cost of hydrogen fuel and the challenges in producing hydrogen in an environmentally sustainable way are also notable drawbacks.
