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A better battery

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A Battery with a Twist was discussed

Publicada em: Educação, Tecnologia, Negócios
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A better battery

  1. 1. Presented by: •Janine V. Samelo BSChem 2
  2. 2. Battery A can full of chemicals that produce electrons When the electrodes are connected to a device to be powered, a chemical reaction occurs. Chemical reactions generate energy that allows electrical current to flow
  3. 3. Battery with a twist: Spin Battery  Developed in University of Miami in US and universities of Tokyo and Tohoku in Japan  It stores energy in magnets Nanomagnets- used to induce electromotive force  Magnetic tunnel Junction- it is where magnetic energy is converted directly into electrical energy  Electrical current made in the process is called spin-polarized current.
  4. 4. It uses spintronics where the electron’s spin as well as its charge is taken into account. Spin battery can be charged by applying a large magnetic field in the magnetic tunnel junction. Large magnetic field Large energy Spin battery can be used for creation of faster, cheaper computer hard drives with no moving parts. Can also be used to power cars
  5. 5. Vanadium Redox Flow Battery (VRB) Invented in The University of New South Wales in Australia Uses an electrolyte where energy is stored and cell stack where energy conversion takes place. Stores energy in two electrolyte solutions: 1. sulfuric acid 2. emulsified vanadium particles Stores energy in two tanks: bigger tanks larger energy Solutions are pumped to opposite sides of the cell that are separated by a polymer membrane. They flow toward the proton exchange membrane where redox reaction between the electrolytes occur.
  6. 6. During the cycle, hydrogen ions are exchanged between two tanks. VRB can recharge and discharged several times w/o wearing out the electrolyte. Can store, absorb and release big amounts of electricity easily. Alternative power to solar and wind farms
  7. 7. Why Vanadium?  The four oxidation states (+2, +3, +4, +5) carries different amounts of electric charge  Can be used for both positive (anode) and negative (cathode) solutions.  Vanadium solutions have indefinite life, so it can be continuously used and reused
  8. 8. References:  Bato Balani ISSN 0117-7050 vol.29 No. 3  Bato Balani ISSN 0117-7052 vol.29 No. 4  www.eurekalert.org/pub_releases/2009-03/uom- uom_1031109.php  www.physics.umd.edu/rgroups/spin/intro.html  www.allaboutbatteries.com/VRB.html  www.electricitystorage.org/search/results/3603ae81d4 ca91eb016e4d849142623e