Energy 101: Fuel Cell Technology

[@rebekkanicol4209]

Very informational made me a little dizzy 😍😘

[@ke4prf]

"Without any combustion". When hydrogen is in the presence of Oxygen, a combustion takes place. Were the writers even briefed on well known facts of science?

[@Polymershik]

Here "combustion" means yielding carbon or carbon oxide/dioxide

[@jadklafjkejalka]

Combustion usually produces heat, light and the emission product of the fuel combined with air, a fuel cell's reaction does not produce light and can be conducted below combustion temperature. The energy obtained from a hydrogen fuel cell is in the form of electrical current. Hydrogen atoms are split into electrons and protons, the protons move to the oxygen where they combine and heat and water are produced. The electrons provide the electrical current, there is no hydrogen combining with oxygen, only the protons of hydrogen reach the oxygen. Hydrogen can be used like propane to run an internal combustion motor or in a furnace. " A fuel cell consists of two electrodes-a negative electrode (or anode) and a positive electrode (or cathode)-sandwiched around an electrolyte. A fuel, such as hydrogen, is fed to the anode, and air is fed to the cathode. In a polymer electrolyte membrane fuel cell, a catalyst separates hydrogen atoms into protons and electrons, which take different paths to the cathode. The electrons go through an external circuit, creating a flow of electricity. The protons migrate through the electrolyte to the cathode, where they reunite with oxygen and the electrons to produce water and heat" www.energy.gov/eere/fuelcells/fuel-cell-basics

[@pawandongre7666]

nice

[@Energy]

Thanks for watching, Pawan Dongre!

[@albertobaylon3245]

Anything with car with end up the same thing. Find another application other than car which can benefit a lot of people.

[@juletteray1635]

Z

[@ke4prf]

Other than Energy storage that is delayed and requires time and processing, it is not a viable method and will eventually be something for the history books. I created this as a child in the 70's. the yield was less than the energy it took to separate the water and the hydrogen / Oxygen was a very dangerous combination.. So, It can not ever be more than a battery. "It runs on water! man!".. Nothing beats natural resources like Natural Gas..

[@alexandrat4775]

who else watching dis for professor brooks class lms

[@ericmeacham9532]

I've been thinking about Nitrogen recently , and I wonder if Nitrogen can also be used as an Energy source and produce Oxygen as a waste product . Being air is 78% Nitrogen and almost 20% Oxygen , I wonder if Physics can reverse engineer what occurs when lightening strikes . America ~ Land of the Free & the Brave .

[@theevermind]

The fundamental principle is the change in chemical energy from the starting chemical to the final chemicals. Gasoline and other hydrocarbons have very high chemical energy. When they burn, they convert to CO2 and H2O, both of which have low chemical energy. That difference in energy is what's released and what we can harness to do work. Nitrogen gas, N2, which makes up most of our atmosphere, has low energy. Furthermore, many of the chemicals it forms when reacted with common elements are undesirable, like cyanide, ammonia, and nitrogen oxides (NOx).

[@SavvySequoia]

Bond dissociation enthalpies of H2(g) and N2(g) are 436.0 KJ mol−1 and 941.8 KJ mol−1 respectively which simply means that same amount of h2 n2, h2 would require less energy and will provide more efficieny

[@ericmeacham9532]

@@SavvySequoia , Thankyou for your response. Please break down your complexities into more simple science, I understand hydrogen 2 atoms/nitrogen 2 atoms/ hydrogen 2 atoms; but don’t comprehend what you’re trying to convey.

[@koi2932]

@@SavvySequoia Yes, but I think the main idea is that H2 can be combined with our atmosphere abundant oxygen and create a harmless byproduct that is water, rather than HN, HNO, or other acids which may be pollutants

[@SavvySequoia]

@@koi2932 Thats a better answer!

[@autumnraine4778]

those poor deer

[@dom2maui]

👍👌

[@JoeHeine]

This is foolish. Hydrogen requires alot of energy to be made in the first place. The video says it itself, it's "energy storage" not an "energy source".

[@moonlightbashir]

Mostly, they produce Hydrogen using renewable energy. Relatively, renewable energy isn't a stable source of energy but if you use it to produce and store Hydrogen, it become more stable. The challenge is storing Hydrogen which can be solve by having a stable usage of life application that depends on Hydrogen. Actually, this is a long discussion. Also, they didn't mention in the video the high cost of fuel cell.

[@tridave9811]

Same issue with batteries but don't have worry about a cell in the battery going bad and carrying al the dead weight of a discharged batter.

[@MelanieZayat]

Isn't it called water splitting?

[@theevermind]

The best term is "electrolysis." en.wikipedia.org/wiki/Electrolysis_of_water

[@theevermind]

Fuel cells are stupid. The energy needed to manufacture the hydrogen defeats all the benefits of the fuel cell. Hydrogen is not an "energy source," it is energy storage. We have no natural supply of hydrogen gas and instead have to use another energy source to manufacture the hydrogen. Nearly all hydrogen currently comes from reforming natural gas, but that process produces just as much CO2 as burning the natural gas. Electrolysis (splitting water) requires electricity to already exist, but the process is inefficient and throws away a third of that initial electricity in just the first step. Overall, it is about 1/4 the efficiency as just putting the electricity into a battery. The only place hydrogen has a real benefit is for planes, drones, or other flying devices. Hydrogen has an excellent energy to weight ratio, meaning a plane fueled by hydrogen may be able to carry more cargo since its fuel weighs less. Every other application, like cars or power backup for buildings, are better and more cheaply served by batteries.

[@jrfutube2013]

What is the final calculated "efficiency" from the electricity used to produce hydrogen gas to the use of the hydrogen gas in a fuel cell to produce electricity?

[@StratonStrangler13927]

Cool but naw