A better battery

  • 87 views
Uploaded on

A Battery with a Twist was discussed

A Battery with a Twist was discussed

  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
87
On Slideshare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
0
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. Presented by: •Janine V. Samelo BSChem 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. 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. 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. 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. 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. 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. 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