Papper battery

WHAT  IS  A  PAPER  BATTERY?

§A paper battery is a flexible, ultra-thin energy storage and production device formed by combining carbon nanotube  with a conventional sheet of cellulose-based paper.

§A paper battery acts as both a high-energy battery and super-capacitor , combining two components that are separate in traditional electronics .

GENERAL Li-ION BATTERY   

• —Generally  Li-ion re-chargeable batteries are used in mobiles,laptops and most of the electronic devices.   
• —3 primary functional component of Li-ion battery are:
                1.  -ve electrode(graphite)
                2. +ve electrode(cobalt oxide)
                3.electrolyte( lithium salt in organic solvent)
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  —During discharge and charging, lithium ions Li+ carry the current from the negative to the positive electrode and vice-versa respectively, through the non-aqueous electrolyte .

Disadvantages of Li-Ion

• EXPENSIVE--40% more than Nicd.
• DELICATE--Battery temperature must be monitered from within(Which raises the price), and sealed particularly well.

• REGULATIONS--When shipping Li-ion batteries in bulk(Which also raises price).
• Class 9 miscellaneous hazardous material

WHY TO USE PAPER BATTERY?

•      —Ultra-thin size  & flexible structure.
• —     —Exhibits property of super-capacitor(22F-36F per gram)
•      —Operating temper ature(-75 to 100 degree celsius)
• —    —provide both long-term, steady power production and bursts of energy.
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•      —Cost-effective.

CARBON NANOTUBES 

• —Carbon nanotube is the main concept behind paper battery —
• —Carbon nanotubes (CNTs; also known as buckytubes) are allotropes of carbon with a cylindrical nanostructure. Allotropes are different structural modifications of an element
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  —CNTs exhibit extraordinary strength and unique electrical properties, and are efficient thermal conductors.
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  —Nanotubes are members of the fullerene structural family. The diameter of a nanotube is on the order of a few nanometers  Their name is derived from their long, hollow structure with the walls formed by one-atom-thick sheets of carbon, called graphene. These sheets are rolled at specific and discrete angles, and the combination of the rolling angle and radius decides the nanotube properties.