【充电5秒钟即可获得最大能量,简直是智能手机的标配】

【充电5秒钟即可获得最大能量,简直是智能手机的标配】康奈尔大学的研究人员创造了一种新型的纳米电池,代替传统电池的阴阳极设计,将所有组件置入一个自组装的三维陀螺结构中,令数以千计的纳米孔隙储满能量及输送能量所必备的元素,可以在五秒钟内把你的电子设备充满电。这项发明已申请专利。

http://www.dailymail.co.uk/sciencetech/article-5742379/The-radical-nanobattery-charge-phone-five-SECONDS.html

The radical nanobattery that could charge your phone in five SECONDS

  • A group from Cornell University built a 3-D battery that charges almost instantly
  • The nanobattery is self-assembling and intertwines its anodes and cathodes 
  • Battery could be charged by the time you put your cable into the socket
  • The group has applied for patent protection on the proof-of-concept work 

 

A group from Cornell University has built an innovative nanobattery that could charge your electronics in just seconds.

The group redesigned a standard battery so that instead of having the batteries' anode and cathode on either side of a nonconducting separator, they intertwined the components in a self-assembling, 3-D gyroidal structure.

This made it so that thousands of nanoscale pores filled with the elements necessary for energy storage and delivery.

Scroll down for video 

A group from Cornell University has built an innovative nanobattery that has the potential to charge electronics in just seconds. Instead of having the batteries' anode and cathode on either side of a nonconducting separator they intertwined the components in a self-assembling, 3-D gyroidal structure

A group from Cornell University has built an innovative nanobattery that has the potential to charge electronics in just seconds. Instead of having the batteries' anode and cathode on either side of a nonconducting separator they intertwined the components in a self-assembling, 3-D gyroidal structure

'This is truly a revolutionary battery architecture,' said Ulrich Wiesner, professor of engineering at the school.

'This three-dimensional architecture basically eliminates all losses from dead volume in your device'

'More importantly, shrinking the dimensions of these interpenetrated domains down to the nanoscale, as we did, gives you orders of magnitude higher power density'

'In other words, you can access the energy in much shorter times than what's usually done with conventional battery architectures,' he added.

The dimensions of the battery have been shrunk down to the nanoscale, so that 'by the time you put your cable into the socket, in seconds, perhaps even faster, the battery would be charged.'

The thin films of carbon have thousands of pores that are just 40 nanometers wide making up the anode, the part of the battery that generates positive current.

They're coated with a 10 nanometer thick separator that's insulating but also ion-conducting. This manages to produce a pinhole-free layer.

HOW DO LITHIUM ION BATTERIES WORK?

Batteries store and releases energy by moving electrons from one 'end' of the battery to the other.

We can use the energy from those moving electrons to do work for us, like power a drill.

These two battery 'ends' are known as electrodes. One is called the anode and the other is called the cathode.

Generally, the anode is made from carbon and the cathode from a chemical compound known as a metal oxide, like cobalt oxide.

The final battery ingredient is known as the electrolyte, and it sits in between the two electrodes.

In the case of lithium-ion batteries, the electrolyte is a salt solution that contains lithium ions—hence the name.

When you place the battery in a device, the positively charged lithium ions are attracted to and move towards the cathode.

Once it is bombarded with these ions, the cathode becomes more positively charged than the anode, and this attracts negatively charged electrons.

As the electrons start moving toward the cathode, we force them to go through our device and use the energy of the electrons 'flowing' toward the cathode to generate power.

You can think of this like a water wheel, except instead of water flowing, electrons are flowing.

Lithium-ion batteries are especially useful because they are rechargeable.

When the battery is connected to a charger, the lithium ions move in the opposite direction as before.

As they move from the cathode to the anode, the battery is restored for another use.

Lithium ion batteries can also produce a lot more electrical power per unit of weight than other batteries.

This means that lithium-ion batteries can store the same amount of power as other batteries, but accomplish this in a lighter and smaller package.

This is vital, because defects such as holes in the separator are what can lead to massive failures causing fires in mobile devices such as cellphones and laptops.

The cathode material, the electrode that current flows from, is made of sulfur that doesn't quite fill the remainder of the pores.

Sulfur can accept electrons but doesn't conduct electricity, so in the final step the pores are backfilled with an electronically conducting polymer.

While this architecture offers proof of concept, Wiesner said, it's not without its own challenges.

Volume changes during discharging and charging the battery gradually degrade the polymer charge collector, which doesn't experience the volume expansion that sulfur does.

'When the sulfur expands,' Wiesner said, 'you have these little bits of polymer that get ripped apart, and then it doesn't reconnect when it shrinks again.'

'This means there are pieces of the 3-D battery that you then cannot access,' he added.

The group is still perfecting the technique, but applied for patent protection on the proof-of-concept work.

 


Comments are closed.



无觅相关文章插件