Mercedes Mullins
The search for an alternative to traditional gasoline and diesel vehicles has led to the development of hydrogen fuel-cell vehicles. These cars are powered by hydrogen gas, which is converted into electricity by the fuel cell, resulting in zero harmful tailpipe emissions. While hydrogen fuel-cell vehicles offer quick refuelling and long driving ranges, they are more expensive to buy and fuel than electric vehicles, and there are currently fewer refuelling stations available. Electric vehicles, on the other hand, are widely available, relatively affordable, and can be conveniently charged at home. So, are fuel-cell vehicles better than gas cars? The answer may depend on factors such as cost, convenience, and environmental impact.
Fuel Cell Vehicles vs Gas Cars
| Characteristics | Values |
|---|---|
| Propulsion System | Fuel cell vehicles use a propulsion system similar to electric vehicles, where energy stored as hydrogen is converted to electricity by the fuel cell. |
| Emissions | Fuel cell vehicles produce no harmful tailpipe emissions, only pure water. |
| Fueling Time | Fuel cell vehicles can be fueled in about 5 minutes, similar to conventional gas cars. |
| Range | Fuel cell vehicles have a driving range of 300-400 miles on a full tank of hydrogen, while gas cars have a shorter range on an equivalent amount of fuel. |
| Fueling Infrastructure | Gas cars have a more established fueling infrastructure, while fuel cell vehicles face challenges due to the limited number of refueling stations and the high cost of creating a new network. |
| Fuel Cost | Hydrogen fuel is currently more expensive than gasoline, but fuel cell vehicles travel about twice as far on an equivalent amount of fuel. |
| Safety Concerns | Hydrogen gas is flammable, raising safety concerns about its production and storage. |
| Weight | Hydrogen fuel cells are lighter than powerful batteries, making them advantageous for certain applications. |
| Refueling Frequency | Fuel cell vehicles need to be refueled with hydrogen, while electric vehicles can be recharged at home and may require less frequent refueling. |
| Technology | Fuel cell vehicles use a different technology than conventional internal combustion engine vehicles, with hydrogen reacting electrochemically to produce electricity. |
| Advanced Technologies | Fuel cell vehicles may be equipped with advanced technologies like regenerative braking systems to increase efficiency. |
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What You'll Learn
Hydrogen fuel cells are lighter than batteries
The energy-to-weight ratio of hydrogen used in fuel cells is ten times greater than that of lithium-ion batteries. This means that hydrogen fuel cells offer a greater range while being lighter and occupying smaller volumes. They can also be recharged in a few minutes, similar to gasoline vehicles.
However, hydrogen fuel cells also have several drawbacks. Hydrogen is challenging, dangerous, and costly to produce, store, and transport. It is highly flammable, tends to escape containment, and reacts with metals, making them more brittle and prone to breakage. Additionally, storing hydrogen as a gas is expensive and energy-intensive.
While hydrogen fuel cells offer a potentially clean, energy-dense, and easy-to-recharge energy source for vehicles, they are currently complicated and expensive to operate. In comparison, lithium-ion batteries are slower to recharge but are much cheaper, safer, and easier to handle.
Automakers are divided on the best approach to reducing vehicle emissions, with some favouring battery-electric vehicles and others advocating for hydrogen fuel cells as the superior zero-emission technology.
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Hydrogen fuel cells are quicker to refuel than electric cars
Hydrogen fuel cell vehicles (HFCVs) are related to electric cars, but they have distinct pros and cons. One of the most significant advantages of HFCVs over electric vehicles is their quick refuelling time. While electric vehicles can take hours to recharge, HFCVs can typically be refuelled in just five minutes, similar to refueling a standard car's gas tank. This is because HFCVs use a fuel-cell stack, where pure hydrogen (H2) combines with oxygen (O2) from the air to produce electricity, and the only waste produced is water vapour.
The quick refuelling time of HFCVs is a result of the design of the fuel-cell stack and the high-pressure carbon-fibre tanks used to store the hydrogen fuel. These tanks are designed to be safe, even in high-speed crashes, and are reinforced to withstand impacts. The refuelling process for HFCVs is also relatively simple and involves drivers refilling their vehicles' tanks at "hydrogen fuelling stations", which are designed similarly to traditional gas stations.
The speed and convenience of refuelling an HFCV are comparable to that of a conventional car. Additionally, HFCVs can carry enough hydrogen fuel to travel 300 to 400 miles, which is comparable to, or even exceeds, the range of traditional gasoline vehicles. This extended range, combined with the quick refuelling process, makes HFCVs a more practical option for longer journeys or situations where frequent stops are not feasible.
However, it is important to note that the availability of hydrogen fuel can be a challenge for HFCV owners. The network of hydrogen fuelling stations is still relatively small, and the cost of hydrogen fuel is significantly higher than that of gasoline or electricity. This limited infrastructure and higher cost can offset the convenience of faster refuelling times, making HFCVs less accessible to some drivers.
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Hydrogen fuel cells have zero tailpipe emissions
Hydrogen fuel cells are gaining popularity in the energy industry as a clean alternative to gas and electricity. Hydrogen fuel cell vehicles (FCEVs) are considered zero-emissions vehicles because they produce no harmful tailpipe emissions. The reaction to produce electricity from hydrogen fuel cells is free of toxic carbon emissions, leading to better air quality, especially in smaller areas like cities.
FCEVs, which include hydrogen-powered automobiles, trains, forklifts, and boats, combine hydrogen and oxygen from the air to generate electricity through an "open system" electrochemical reaction. This process only produces heat, electricity, and water vapour to power the electric motor, keeping the vehicle operational. FCEVs are equipped with advanced technologies, such as regenerative braking systems, to increase efficiency. This system captures the energy lost during braking and stores it in a battery.
While hydrogen is abundant in the universe, it must be separated from other compounds to be used as fuel, and this process can be energy-intensive. The emissions associated with producing hydrogen fuel depend on the feedstock and production method. Currently, most hydrogen is derived from natural gas through steam methane reforming (SMR), which is energy-intensive and can result in carbon dioxide and methane emissions if not properly managed. However, electrolysis is emerging as a more sustainable alternative to fossil fuels for hydrogen production.
Despite the challenges in hydrogen production, FCEVs offer immediate refuelling and full power, making them a viable option for long-haul trucks, locomotives, and ships where battery technology may not yet be suitable. FCEVs also contribute to a more diverse energy landscape, increasing energy resiliency and strengthening the economy. With ongoing improvements in hydrogen technology and infrastructure development, FCEVs hold promise as a zero-tailpipe-emissions alternative to conventional internal combustion engine vehicles.
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Hydrogen fuel cells are expensive to buy and run
The high cost of hydrogen fuel cells is due in part to the cost of hydrogen fuel, which is currently higher than that of traditional fuels. However, this is expected to change in the coming years. Experts predict that the price of hydrogen fuel will drop significantly as production scales up, with some suggesting that it will be cost-competitive with traditional fuel sources within a decade. The cost of renewable energy sources used for green hydrogen production, such as solar, wind, and water, is also falling, which will further reduce the cost of hydrogen fuel.
In addition to the high cost of the vehicles and fuel, the infrastructure for hydrogen refueling stations is still in the early stages of development. Creating a brand-new fueling network from scratch has proven to be a significant challenge, both expensive and unreliable. This lack of infrastructure makes hydrogen vehicles less appealing to consumers, as refueling can be difficult and expensive.
Despite the current high cost of hydrogen fuel cells, there are reasons to believe that they will become more affordable in the future. As production scales up and the infrastructure improves, the cost of hydrogen fuel is expected to decrease significantly. Additionally, governments around the world are increasing their support for hydrogen fuels, which will likely accelerate the development and adoption of this technology.
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Hydrogen fuel cells are safer when mounted inside the vehicle
Fuel cell electric vehicles (FCEVs) are similar to electric vehicles in that they use a propulsion system where energy stored as hydrogen is converted to electricity by the fuel cell. Unlike conventional internal combustion engine vehicles, FCEVs produce no harmful tailpipe emissions.
FCEVs are fuelled with pure hydrogen gas stored in a tank on the vehicle. Hydrogen fuel cells are generally mounted inside vehicles, usually in the back, behind the driver and passenger seats. This is safer as the fuel cell is protected from getting hit, unlike mounting it under the vehicle. This also makes servicing and replacing the in-tank fuel pump much quicker and easier.
Hydrogen fuel cells are also safer than conventional cars as they do not rely on combustion. Instead, they use a safe chemical transfer without burning fuel. Hydrogen is also non-toxic and non-poisonous to humans, which means that working with it entails fewer threats than fossil fuels.
However, hydrogen fuel cells are not without their drawbacks. Creating a brand-new fuelling network from scratch has been problematic and expensive. The fuel is also much pricier for drivers than gasoline or electricity. As of mid-2022, there were 17,000 or fewer hydrogen-powered vehicles on US roads, all of them in California, the only state with a network of retail hydrogen fuelling stations.
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Frequently asked questions
Yes, fuel cell vehicles are more environmentally friendly than gas cars as they produce no harmful tailpipe emissions.
Yes, fuel cell vehicles are more expensive than gas cars. The two mainstream hydrogen cars on sale in the U.S., the Toyota Mirai and Hyundai Nexo, start at around $50,000 and $60,000, respectively.
Yes, it costs around $75 to $125 to fuel a fuel cell vehicle, depending on the fuel tank size. In comparison, it only costs $6 to $10 to recharge the batteries of an electric vehicle.
Fuel cell vehicles are more efficient than gas cars in terms of refueling time and driving range. A fuel cell vehicle can be refueled in just 5 to 10 minutes and has a driving range of over 300 miles. However, fuel cell vehicles are heavier than electric vehicles, so they are not as efficient in terms of speed.
Fuel cell vehicles are not necessarily safer than gas cars. Hydrogen gas is extremely flammable, which raises safety concerns among the public regarding the production and storage of hydrogen.
