Hydrogen cars for the masses one step closer to reality, thanks to UCLA invention

Hydrogen cars for the masses one step closer to reality, thanks to UCLA invention
Richard Kaner and Maher El-Kady in Kaner's office. Kaner is holding a replica of a new energy storage and conversion device they developed. Credit: Reed Hutchinson/UCLA

UCLA researchers have designed a device that can use solar energy to inexpensively and efficiently create and store energy, which could be used to power electronic devices, and to create hydrogen fuel for eco-friendly cars.

The could make hydrogen cars affordable for many more consumers because it produces hydrogen using nickel, iron and cobalt—elements that are much more abundant and less expensive than the platinum and other precious metals that are currently used to produce hydrogen fuel.

"Hydrogen is a great fuel for vehicles: It is the cleanest fuel known, it's cheap and it puts no pollutants into the air—just water," said Richard Kaner, the study's senior author and a UCLA distinguished professor of chemistry and biochemistry, and of materials science and engineering. "And this could dramatically lower the cost of hydrogen cars."

The technology, described in a paper in the journal Energy Storage Materials, could be especially useful in rural areas, or to military units serving in remote locations.

"People need fuel to run their vehicles and electricity to run their devices," Kaner said. "Now you can make both electricity and fuel with a single device."

It could also be part of a solution for large cities that need ways to store surplus electricity from their electrical grids.

"If you could convert electricity to hydrogen, you could store it indefinitely," said Kaner, who also is a member of UCLA's California NanoSystems Institute.

Traditional hydrogen cells and supercapacitors have two electrodes: one positive and one negative. The device developed at UCLA has a third electrode that acts as both a supercapacitor, which stores energy, and as a device for splitting water into hydrogen and oxygen, a process called water electrolysis. All three electrodes connect to a single solar cell that serves as the device's power source, and the electrical energy harvested by the solar cell can be stored in one of two ways: electrochemically in the supercapacitor or chemically as hydrogen.

The device also is a step forward because it produces in an environmentally friendly way. Currently, about 95 percent of worldwide comes from converting fossil fuels such as natural gas into hydrogen—a process that releases large quantities of carbon dioxide into the air, said Maher El-Kady, a UCLA postdoctoral researcher and a co-author of the research.

"Hydrogen energy is not 'green' unless it is produced from renewable sources," El-Kady said. He added that using solar cells and abundantly available elements to split water into hydrogen and oxygen has enormous potential for reducing the cost of hydrogen production and that the approach could eventually replace the current method, which relies on .

Combining a supercapacitor and the water-splitting technology into a single unit, Kaner said, is an advance similar to the first time a phone, web browser and camera were combined on a smartphone. The new technology may eventually lead to new applications that even the researchers haven't considered yet, Kaner said.

The researchers designed the electrodes at the nanoscale—thousands of times thinner than the thickness of a human hair—to ensure the greatest surface area would be exposed to water, which increases the amount of hydrogen the device can produce and also stores more charge in the supercapacitor. Although the device the researchers made would fit in the palm of your hand, Kaner said it would be possible to make larger versions because the components are inexpensive.

"For hydrogen cars to be widely used, there remains a need for a technology that safely stores large quantities of at normal pressure and temperature, instead of the pressurized cylinders that are currently in use," said Mir Mousavi, a co-author of the paper and a professor of chemistry at Iran's Tarbiat Modares University.

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More information: Yasin Shabangoli et al. An integrated electrochemical device based on earth-abundant metals for both energy storage and conversion, Energy Storage Materials (2017). DOI: 10.1016/j.ensm.2017.09.010
Citation: Hydrogen cars for the masses one step closer to reality, thanks to UCLA invention (2017, November 20) retrieved 19 October 2019 from https://phys.org/news/2017-11-hydrogen-cars-masses-closer-reality.html
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User comments

Nov 20, 2017
I wonder how pure the water has to be in order to not clog the electrodes?

Nov 20, 2017
Tesla promises 600 miles per charge by 2020. Hydrogen powered cars are dead.

Nov 20, 2017
Why ever would one want to combine a super capacitor with and electrolysis device? If you are generating H2 as an energy storage medium then you need compressors and tanks. Super capacitors have yet to be developed that can store enough energy to provide the energy required for a vehicle. This is just more green based fantasy from a corrupt educational system. Connecting a solar cell to a Lion battery is a much simpler solution.

Nov 20, 2017
If the crux of the development is a LOW COST catalyst that can enable the electrolysis of water then please make that the main focus of the article. As the article was written, the development looks to be pure fluff.

Nov 20, 2017
Tesla promises a lot of things. doesn't make it true.

Lithium ion batteries are such a terrible short term solution to achieving clean energy transportation. Lion batteries will cause more waste when they are used up.

Nov 22, 2017
The idea of a 'hydrogen economy' is an extremely bad one for several reasons.
But when finally cheep effective magnesium-sulfur batteries are developed that will replace the expensive lithium batteries, all electric cars will run on the better magnesium-sulfur batteries giving them good range between recharging and then there CERTAINLY will be no point in having hydrogen cars.

Nov 22, 2017
I see some applications for the device, I have ideas on putting it to the test and am going to put together a team to make it reality, There's a lot of research to be done yet; I touch on this in my piece on AstronautID . com (see post "Device able both to convert electricity to hydrogen and store it to be put to the test on large scale")

If someone is intersted let me know.
I'll be happy to hear your comments on the idea. Thanks in advance.

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