Top 10 Energy Sources of the Future Graphene Supercapacitors Are About To Change 5 months ago   13:12

The Daily Conversation
These are ten most promising alternative energy sources of tomorrow.

It’s a really exciting time to be alive. We have a front row seat to the only known transformation of a world powered by dirty fossil fuels, to a planet that gets its energy from renewable, clean sources. It’s happening just once, right now.

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10. Space-based solar power
9. Human Power
8. Tidal Power
7. Hydrogen (fuel cells)
6. Geothermal heat from underground lava beds
5. Nuclear Waste
4. Solar windows
3. Bio-fuels (algae)
2. Flying wind farms
1. Nuclear fusion

Comments 2195 Comments

The Daily Conversation
VOTE to support alternative energy in the USA!!!
Dennis Whigan
how about perpetual motion?
l i q u i d h o t m a g m a
unboxing theboxx
Equine Emergency Rescue transport
Those Nations don't produce anything it's the huge companies RD and production of new tech Governments don't produce anything its people privately owned companies. No it's companies not Governments
kim weaver
Reactor and fuel engineers would LOVE to get 5% fission of uranium or plutonium fuels. In fact, the fuel bundles are removed from the core of light BWRs when only 0.5 to 0.7% of the fuel has fissioned.
Fusion is the way to go i think, i heard they build a magnetic field to use as a "box" they sustained it for a few seconds before they had to shut it off. I cant think of a better energy source than Sun v2.0 in terms of amounts and space needed and ressources used to replace parts and amount of energy supplied.
Human cyborg energy seems like enslavement with extra steps.
The ones in the water will take much maintainence, the ones in the air will have its fair share of problems too, bio energy looks to be great, although how will it perform on a grandscale?
Geothermal energy is just asking for it to go wrong the way i understand it.
Blossom Serena
What powers this world is money. Money is more important than the environment or even human lives. Hard to believe, I know, but it’s true. This world will never accept alternative energy sources.
(That doesn’t mean there is no hope though...)
Ivor O'Connor
The bad ideas in this old video remind me of the bad videos of the 60s.
Thirumaran Thirumaran
Renewable energy @t
Background music?
Underground lava is called magma !
Dave Balmada
And here we are, 5 years later and we're burning more fossil fuels than ever before
Heart of Fire
I feel like lightning should be in this
Brian Huffman
"FUSION power is always 30 years away"
Joachim Petersen
What the answer. Nuclear, nuclear and nuclear!
Renatas Savickas
space mirrors - come on! - Space debris and other objects which fly around don't mix with mirros very well
Nithish Kumar
lol im here in 2018, i thought this video was new
christian cowles
I also hope to see human and animal waste processed for 1) oils for biodiesel, 2) protein for animal food, 3) fiber for biofuel, 4) nitrates for fertilizers, and 5) methane for natural gas fuel. Some of these have been done a little, but as technology gets better, I think we will really be able to turn abundant waste into abundant resources.
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Graphene Supercapacitors Are About To Change Top 10 Energy Sources of the Future 5 months ago   09:18


We live our lives through portable devices, and the race is on to create better energy storage for those devices. Could graphene supercapacitors be the holy grail?

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Ted-Ed, how batteries work

BASF Lithium Ion

Impossible Battery - Seeker



So before I can explain how super capacitors will fix this, let’s back up and explain how batteries work in the first place.

To make it simple, batteries work by moving electrons from a negatively charged material called an anode to a positively charged material called the cathode, and the device siphons off those electrons to power the device.

For instance, nickel cadmium batteries use a nickel oxide cathode and a cadmium anode. Hence the name.

This is a chemical process called oxidation that involves an electrolyte layer sandwiched between the electrodes.

In the case of the nickel cadmium batteries, they use potassium hydroxide as the electrolyte.

But this is a one-shot deal. The chemical reaction releases the electrons, but there’s no way to re-introduce electrons into the equation.

So they’re not rechargeable. And for a world increasingly reliant on portable devices, that’s just not good enough.

Enter Lithium-Ion batteries, which were developed in the 1970’s by John B. Goodenough. That’s his real name. That’s not a joke.

Lithium ion batteries have a cathode made of lithium, duh, and an anode made of carbon, again with an electrolyte between the layers to facilitate the reaction.

The difference is lithium will absorb more electrons, so it can be recharged. But it is still a chemical reaction, so it can only reintroduce those electrons at a certain charge rate.

Super capacitors work differently. Instead of using a chemical reaction to make electrons flow, also called and electrochemical process, they use static electricity, or an electrostatic process.

Now, capacitors have been in our computers for decades, and they work by holding opposite charges between two metallic plates separated by a dielectric material.

Super capacitors, as you may have already figured out, are larger versions of capacitors that use a double layer to hold more energy. In fact they’re sometimes called double-layer capacitors.

And the cool thing about them is that since the electricity is static and not chemical, there’s far less resistance to the charge. In fact, it’s almost instantaneous.

The problem is, they don’t hold that much energy. You need a vast amount of surface area to hold enough energy to make them really useful.

So Lithium Ion batteries are very energy dense, meaning they hold a lot more stored energy, but super capacitors are very power dense, meaning the transfer the energy much faster.

If, theoretically, you could create super capacitors that could hold as much as a lithium ion battery, you’d have cell phones that could recharge in seconds and it would be good for the rest of the day.

And dare we dream it? An EV car that fully charges faster than it takes to pump gas.

There is one material that could make this dream a reality. It’s called graphene.

Graphene is basically a one-atom thick lattice of carbon atoms that has some ridiculous properties. It’s 200 times stronger than steel, but incredibly light, biodegradable, biocompatible, meaning it can be used in the human body.

They say it can be used to desalinate sea water, make space elevators, and form the basis for supercomputers, but for our purposes, it also happens to be one of the most electrically capacitive substances known to man.

It has the same energy density as lithium ion batteries with the power density of super capacitors. And since it’s only one atom thick, you can pack a ton of surface area into a small space.

With any luck, in the next 10-15 years, we’ll have super capacitor batteries that can handle energy densities at industrial scales giving us quick, plentiful electricity whenever we need it.

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