PRESENTED BY-ADVES 8th (B)ROLL No- 277

INTRODUCTIONThe creation of the paper battery drew from a diverse pool of disciplanes, requiring expertise in materials science, energystorage and chemistry.

In august 2007, a research team at Rensselear polytechnicInstitute led by Drs. Robert Linhardt, the Ann and John H.BroadBent, senior constellation professors of bio catalysis and Metabolic engineering at Rensselaer, the Pulickel M.Ajayan,Professor of materials science and engineering AND OmkaramNalamasu, professor of chemistry with a joint appointment inMaterial science and engineering developed the paper battery,also known as nano composite paper.

Cellulose Paper + Nano-technology ?An Overview of the battery technology that powers our mobile society.

Electrochemical reaction - a chemical reaction between elements which creates electrons.Oxidation occurs on the metals (electrodes), which creates the electrons.Electrons are transferred down the pile via the saltwater paper (the electrolyte).A charge is introduced at one pole, which builds as it moves down the pile.

Battery Chemistry

Recharge-ability: basically, when the direction of electron discharge (negative to positive) is reversed, restoring power.The Memory Effect: (generally) When a battery is repeatedly recharged before it has discharged more than half of its power, it will forget its original power capacity.Cadmium crystals are the culprit! (NiCd)Recharge-ability & the memory effect

In the 1970s, Lithium metal was used but its instability rendered it unsafe and impractical. Lithium-cobalt oxide and graphite are now used as the lithium-Ion-moving electrodes.The Lithium-Ion battery has a slightly lower energy density than Lithium metal, but is much safer. Introduced by Sony in 1991.Lithium (Ion) Battery Development

Advantages of Using Li-Ion BatteriesPOWER High energy density means greater power in a smaller package.160% greater than NiMH 220% greater than NiCdHIGHER VOLTAGE a strong current allows it to power complex mechanical devices. LONG SHELF-LIFE only 5% discharge loss per month.10% for NiMH, 20% for NiCd

Disadvantages of Li-IonEXPENSIVE -- 40% more than NiCd.DELICATE -- battery temp must be monitored from within (which raises the price), and sealed particularly well.REGULATIONS -- when shipping Li-Ion batteries in bulk (which also raises the price). Class 9 miscellaneous hazardous materialUN Manual of Tests and Criteria (III, 38.3)

Environmental Impact of Li-Ion BatteriesRechargeable batteries are often recyclable.Oxidized Lithium is non-toxic, and can be extracted from the battery, neutralized, and used as feedstock for new Li-Ion batteries.

The IntersectionIn terms of weight and size, batteries have become one of the limiting factors in the development of electronic devices.

The problem with...lithium batteries is that none of the existing electrode materials alone can deliver all the required performance characteristics including high capacity, higher operating voltage, and long cycle life. Consequently, the other way is to optimize available electrode materials by designing new composite structures on the nanoscale.

Nano-Science and-TechnologyThe attempt to manufacture and control objects at the atomic and molecular level (i.e. 100 nanometers or smaller).1 nanometer = 1 billionth of a meter (10-9)1 nanometer : 1 meter :: 1 marble : Earth1 sheet of paper = 100,000 nanometers

Nano + Li-Ion = ?Nanotechnology and Li-Ion applications in the commercial sector are apparent...lighter, more powerful batteries increase user mobility and equipment life.DeWalt 36volt cordless power toolsNanotechnology & Li-Ion applications in the residential sector are not so obvious...Micro-generated energy storage?

Micro-Generated Energy StorageLi-Ion batteries high energy density allows batteries them to power complex machinery.Li-Ion batteries recharge quickly and hold their charge longer, which provides flexibility to the micro-generator.particularly helpful for wind and solar generators!Lightness, and power per volume allow for storage and design flexibility.

What is Nanocomposite paper It is a hybrid energy storage device that combines characteristics of batteries and super capacitors.

It takes the high energy storage capacity of the battery and the high energy density of the super capacitor which producing bursts of extreme power.

Materials and DescriptionThis energy storage device is based on two basic, inexpensive materials: carbon nanotubes and cellulose. Also an ionic liquid provides the third component: electrolyte. Engineered together, they form nanocomposite paper. It is as thin and flexible as a piece of paperit can be twisted, folded, rolled and cut to fit any space without losing any of its energy. The paper battery can also be stacked to boost the total power output.

How it is made To create this paper we have to first dissolve the cellulose in the ionic liquid and then infiltrate the cellulose paper with aligned carbon nanotubes which form the uniform film.

Then it is solidified on dry ice, after this it is soaked in ethonal to remove the ionic liquid and dried in a vacume, which gives us our final product: Nanocomposite paper.

BLOCK D IAGRAM

Paper battery:A paper battery is a flexible, ultra-thin energy storage and production device formed by combining carbon nanotube s 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 .

This combination allows the battery to provide both long-term, steady power production and bursts of energy. Non-toxic, flexible paper batteries have the potential to power the next generation of electronics, medical devices and hybrid vehicles, allowing for radical new designs and medical technologies.

WHAT IS A CARBON NANOTUBE?

A carbon nanotube is a tube-shaped material, made of carbon, having a diameter measuring on the nanometer scale. A nanometer is one billionth of the meter or about one ten-thousandth the thickness of the human hair. The graphite layer appears somewhat like a rolled-up chicken wire with a continuous unbroken hexagonal mesh and carbon molecules at the apexes of the hexagons.Carbon Nanotubes have many structures, differing in length, thickness, and in the type of helicity and number of layers. Although they are formed from essentially the same graphite sheet, their electrical characteristics differ depending on these variations, acting either as metals or as semiconductors.

As a group, Carbon Nanotubes typically have diameters ranging from

At Stanford, nanotubes + ink + paper = instant battery

Dip an ordinary piece of paper into ink infused with carbon nanotubes and silver nanowires, and it turns into a battery or super capacitor. Crumple the piece of paper, and it still works. This is new way of storing electricity.

Paper battery is the one that holds promise for new types of lightweight, high-performance energy storage.

ordinary paper could one day be used as a lightweight battery to power the devices that are now enabling the printed world to be eclipsed by e-mail, e-books and online news.

How a paper battery works? 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.

"The warm up time, power loss, component malfunction; you don't get those problems with integrated devices. When you transfer power from one component to another you lose energy. But you lose less energy in an integrated device."

You can implant a piece of paper in the body and blood would serve as an electrolyte.

The battery contains carbon nanotubes, each about one millionth of a centimeter thick, which act as an electrode. The nanotubes are embedded in a sheet of paper soaked in ionic liquid electrolytes, which conduct the electricity.

Electricity is the flow of electrical power or electrons 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.

The flexible battery can function even if it is rolled up, folded or cut.

Although the power output is currently modest, increasing the output is easy.

"If we stack 500 sheets together in a ream, that's 500 times the voltage. If we rip the paper in half we cut power by 50%. So we can control the power and voltage issue."

Because the battery consists mainly of paper and carbon, it could be used to power pacemakers within the body where conventional batteries pose a toxic threat.

We wouldn't want the ionic liquid electrolytes in our body, but it works without them that is we can implant a piece of paper in the body and blood would serve as an electrolyte."

Summary:

In case of the lead-acid batteries, the RAYON serves as an electrolyte. But the rayon is made with sulphuric acid. It contains 33% of H2SO4 and with specific gravity 1.25, and is commonly called battery acid. As the sulphuric acid is a strong acid and a good electrolyte, it acts a one of the electrolytes in the manufacture of the paper batteries.Due to its better properties that is physical and chemical properties and the reactions with water and with other reagents, keeping all this in consideration, the sulphuric acid is used as one of electrolytes of the paper battery.Thus in case of other ionic liquid also, we must consider all these properties, to make it use for the purpose of making paper batteries

uses The paper battery combined with the structure of the nanotubes embedded within gives them their light weight and low cost, making them attractive for portable electronics, aircraft, automobiles and toys (such as model aircraft), medical devices such as pacemakers.

The medical uses are particularly attractive because they do not contain any toxic materials and can be biodegradable, a major drawback of chemical cells.

However, there is a caution that commercial applications may be a long way away, because nanotubes are still relatively expensive to fabricate. Currently, they are making devices a few inches in size.

In order to be commercially viable, they would like to be able to make them newspaper size, a size which taken all together would be powerful enough to power a car.

Applications 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 anesthesia, antichloristic, anodyne, etc.. Into skin.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.

Paper battery offers future power

The black piece of paper can power a small light.

Flexible paper batteries could meet the energy demands of the next generation of gadgets.

The ambition is to produce reams of paper that could one day power a car.

The paper battery was a glimpse into the future of power storage.

The versatile paper, which stores energy like a conventional battery, can also double as a capacitor capable of releasing sudden energy Bursts for high-power applications.

CONCLUSION This energy storage device is cost-effective because the device can be able to be used in the smallest and most diversly designed electronics. Such as cell phones, mp3 players and medical equipment.

The reasearchers say that it can also be used in automobiles and aircraft. But it has a poor processibility, being that it is particularly insoluble of infuseble. Lastly, the use of ionic liquid makes the device environmentally friendly; a major concern in nanotechnology.

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