Paper battery final (4)

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Paper battery final (4)

  1. 1. PAPERBATTERY Presented by Shruti Dahiwal Preeti Kothale
  2. 2. • Flexible, ultra-thin energy storage and production device.• Formed by combining carbon nanotubes with a conventional sheet of cellulose-based paper.• A paper battery acts as both a high-energy battery and super capacitor.• This combination allows the battery to provide both long-term, steady power production and bursts of energy .
  3. 3. • Can be folded, cut or otherwise shaped for different applications without any loss of efficiency.• Can be stacked in multiples of power output.• 2.5 volts of electricity from a sample the size of a postage stamp.
  4. 4. • Combining cellulose with an infusion of aligned carbon nanotube’s that are each approximately one millionth of a centimeter thick• These tiny filaments act like the electrodes found in a traditional battery, conducting electricity when the paper comes into contact with an ionic liquid solution.• With no water in solution, cannot freeze and hence operating temp -75 to 150 Degree Celsius
  5. 5. • Carbon nanotubes (CNTs; also known as buck tubes) are allotropes of carbon with a cylindrical nanostructure.• They exhibit extraordinary strength and unique electrical properties, and are efficient thermal conductors.• Nanotubes are members of the fullerene structural family, the diameter of a nanotube is on the order of a few nanometers 
  6. 6. • Because of the symmetry and unique electronic structure of graphene, the structure of a nanotube strongly affects its electrical properties. For a given (n,m) nanotube, if n = m, the nanotube is metallic; if n − m is a multiple of 3, then the nanotube is semiconducting with a very small band gap, otherwise the nanotube is a moderate semiconductor.
  7. 7.  Growing the nanotube’s on a silicon substrate and then filling the gaps in the matrix with cellulose. Once the matrix has dried, the material can be peeled off of the substrate, exposing one end of the carbon nanotube’s to act as an electrode . When two sheets are combined, with the cellulose sides facing inwards, a super capacitor is formed that can be activated by the addition of the ionic liquid. This liquid acts as an electrolyte and may include salt- laden solutions like human blood, sweat or urine.
  8. 8. • While a conventional battery contains a number of separate components, the paper battery integrates all of the battery components in a single structure, making it more energy efficient.• INTEGRATED DEVICES – No warm up time, power loss, component malfunction; Loss of energy while transferring power from one component to another, less energy lost in an integrated device Refer: http://www.nanowerk.com/spotlight/spotid=5210.php
  9. 9.  Batteries produce electrons through a chemical reaction between electrolyte and metal in the traditional battery. Chemical reaction in the paper battery is between electrolyte and carbon nanotubes. Electrons collect on the negative terminal of the battery and flow along a connected wire to the positive terminal Electrons must flow from the negative to the positive terminal for the chemical reaction to continue.
  10. 10.  The sheets can be rolled, twisted, folded, or cut into numerous shapes with no loss of integrity or efficiency, or stacked like printer paper to boost total output. The components are molecularly attached to each other: the carbon nanotube print is embedded in the paper, and the electrolyte is soaked into the paper. The medical uses are particularly attractive because they do not contain any toxic materials and can be biodegradable.
  11. 11. 5 : APPLICATIONS…• The paper-like quality of the battery combined with the structure of the nanotubes embedded within - light weight and low cost. Cosmetic path: paper battery is set in iontophoresis patch for whitening and wrinkles.• Medical path: paper battery is set in iontophoresis patch. It helps to deliver functional drug i.e., local anaesthesia, antichloristic , anodyne, etc.. Into skin.
  12. 12. • RFID tag: paper battery is useful to use as a power source of active RFID tag.• Functional card: paper battery is possible to use as a power source of melody and display card.• Micro processor; paper battery supply power to micro processor.• Ability to use electrolytes in blood make them potentially useful for medical devices such as pacemakers . Refer : http://en.wikipedia.org/wiki/Buckminster_Fuller

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