Rice University researchers have created a new type of ultra-thin, high-performance, flexible lithium-free battery. Its thickness is less than 1/100 inch (254 micrometers), it has super capacitor-like performance, and it can maintain 76% capacity after 10,000 times of charge and discharge, or thousands of bends. Its energy density is as high as 384Wh/kg and its power density has reached 112kW/kg.
The thickness of the porous nickel-fluoride film is less than 1 micrometer, and the image above is an image under an electron microscope. In a new type of battery created by Rice University, the material acts as an effective electrode.
The thickness of this flexible battery is less than 200 microns. Tests have shown that it can retain more than 76% capacity after 10,000 charge and discharge cycles.
The nickel-fluoride electrode is coated with a solid electrolyte outside, and this structure can form an efficient energy storage device (combining the best advantages of the battery and the super capacitor).
After being protected by the polymer, this thin-film energy storage device can maintain the excellent characteristics of the battery and the super capacitor even after being bent 1000 times.
The researchers at Rice University's “Lithium-free flexible energy storage technology†team consisted of postdoctoral Yang Yang, professor James Tour, and graduate student Gedeng Ruan.
Yang Yang is demonstrating a flexible energy storage prototype that combines the dual excellence of batteries and supercapacitors.
It is expected that this technology can be used in wearable and flexible electronic products (such as smart watches and fitness wristbands).
Scientists have said that they have contacted companies interested in this, thinking that the batteries can be made thinner at mass production while being stacked on top of each other to achieve higher capacity.
More information on this research has been published in the latest issue of the Journal of the American Chemical Society.
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