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Group 4 Paper Battery

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Karen Lai

on 12 April 2011

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Transcript of Group 4 Paper Battery

Paper Battery What is a paper Battery? It is a battery made up of 90% cellulose which is infused with aligned carbon nanotubes. Nanotubes act as electrodes and allows the storage device to conduct electricity. How is it made? Componets are moleculary attacted to each other by embedding carbon nanotubes into the cellulose. This is done by soaking the paper in ionic liquid electrolyte, like a lithium-containing solution with carbon nanotubes. The nano details The end product looks, feels and weighs the same as a black piece of paper An ionic liquid is an electrically conducting fluid made up of ions and short-lived ion pairs Carbon nanotubes, act like the electrodes found in a traditional battery, conducting electricity The chemical reaction takes place between the carbon nanotube and electrolyte Carbon Nanotubes Are hexagonal shaped arrangements of carbon atoms at the nano level (the billionth of a meter) Electrons collect on the negative terminal of the battery and flow along a connected wire to the postive terminal The electrons return to the electrolyte The Differences “It’s a way to power a small device such as a pacemaker without introducing any harsh chemicals – such as the kind that are typically found in batteries — into the body.” - Pushparaj Opinions “the paper battery is a neat idea," he said. "This is an easy-to-fabricate device, and the proposed flexible capacitor/battery has potential." -Peter Kofinas, professor in the Fischell Department of Bioengineering at the University of Maryland “It’s essentially a regular piece of paper, but it’s made in a very intelligent way,” said Linhardt, “We’re not putting pieces together — it’s a single, integrated device,” he said. “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 end result is a device that looks, feels, and weighs the same as paper.” Battery weight and life have been an obstacle to commercial viability of electric-powered cars and trucks.”Society really needs a low-cost, high-performance energy storage device, such as batteries and simple supercapacitors,” Stanford assistant professor of materials science and engineering and paper co-author Yi Cui said.
-covalent bonds formed between carbon molecules
-held together by Van der Waals forces (London forces); electrostatic force is formed by the attraction of protons in one atom towards the electrons in the other Paper batteries:
are more durable
more flexible; higher surface-to-volume ratio
more efficient conductors
higher energy storage
natural occurring electrolyte; non- toxic between paper batteries and conventional batteries from the experts Advantages & Disadvantages of a Paper Battery functions between -75 and 150°C durable, high energy storage lightweight and flexible like paper 2.5 volts produced from battery the size of a postage stamp ink doesn’t peel off of paper battery like with other plastic films
less surface area = less power
potential poisoning over time or health problems
advance technology; only for those who can afford, leaving behind the poor unknown knowledge; to fully understand it’s potential and it’s structure

ethical problems (lethal weaponry) more expensive than normal battery
can use various liquids as an electrolytes
dry paper battery can be placed into the body
uses natural occurring electrolytes in blood, sweat, or urine to work. Why aren't Paper batteries used today? Carbon nanotechnology is expensive, though creating a carbon nanotube can quickly be accomplished it is quite costly to produce.

More research needs to be done into how these batteries can be used. i.e. health risks But in a few years, instead of reaching for your charger when your battery dies, you reach for a piece of paper... A Paper Battery Group 4 Production By: Gayathri Kalathil-Prem Karen Lai Karen James Nerissa Nankissoor Thank YOU when the paper comes into contact with an ionic liquid solution. no water in ionic liquid to freeze/evaporate in extreme environmentals Future Applications * Inexpensive reprographic (the art of recopying, reproducing or reprinting material) device * Smaller, lighter, more portable electronics * Hybrid automobiles - paper batteries would replace conventional batteries Medical devices: Pacemakers Pacemakers which use blood as a source of power is being considered because paper batteries are non-toxic and biodegradable.
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