A new battery technology may pave the way of life for cheap , long - exist exponent storage that can rapidly pump electricity into the grid to even up for fluctuate renewables like flatus and solar .
highly-developed byYi Cuiand workfellow at Stanford University in California , the battery ’s key reward is its electrodes , which can run for a thousand charge hertz without degrading . stamp battery electrodes typically disgrace over time as ions in a battery cell repeatedly slam into them and are ripped away again .
By coating the negatively charged cathode in copper hexacyanoferrate and using an anode made of trip carbon and a conductive polymer – compound that permit electrical energy - carrying ion to move easily in and out – the team were able to build a prototype stamp battery with electrode that did n’t lose capacity over sentence .
The new electrodes sandwich a liquid solution of positively charged K ions , a electric battery design that wasinvented only in 2004using ceremonious electrodes . As in a standard stamp battery , charge particles are driven towards the electropositive electrode during charging , feed back to the minus electrode to provide current during discharge . The researchers write that their battery ’s components are cheap and commercially available .
Most muscularity - computer storage technologies are too expensive or inefficient to be wide useful in backing up wind and solar power sources , the researchers say .
“ Virtually all of the free energy - storage capacitance presently on the grid is offer by pumped hydroelectric power , which need an Brobdingnagian capital investing , is location - hooked and get from low Energy Department efficiency , ” the team pen .
presently , the world ’s most powerful battery is in Zhangbei , Hebei province , China ( above ) . It can contain 36 megawatt - hours of energy , and is used as a backup to a 140 - megawatt solar and wind powerfulness instalment . [ Nature Communications ]
Image by Corporation / Rex Features and Business Wire
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