We re the Bomb! Duke Energy Academy. Duke Energy Academy

Transcription

1 Blue Batteries We re the Bomb!

2 Problem Statement We must find batteries which provide lots of power, are small, are safe, are made of common materials, and have a long life.

3 Basic Battery Function Batteries powered by electrochemical reactions A battery has two electrodes: Electrons flow from the anode to the cathode Oxidation-reduction (redox) reactions Oxidation - loss of electrons Reduction - gain of electrons Oxidation: anode Reduction: cathode Google Images

4 Basic Battery Function One battery can have several voltaic cells with two half-cells The reaction is spontaneous and creates electrical energy Google

5 Lithium-Ion Batteries Common Uses Cellular devices and laptop computers Pros Rechargeable High Energy Density Low self discharge Utility Vehicles Li-Ion s are replacing lead- acid batteries Same voltage Cons Half the cost Two times the energy and reduce cost by 30% Google Images Google Images

6 Sodium Sulfur Batteries Made from liquid sodium and sulfur High energy density, high efficiency, long life cycle, and uses inexpensive materials High operating temperatures - up to 300 degrees Celsius Suitable for grid energy storage, not mobile use 93sulfur_battery#mediaviewer/File: NaS_battery.png

7 Lithium Sulfur Batteries Very high energy density Light due to the low weight of lithium and sulfur Energy density of 500 W*h/kg Significantly better than most lithium ion batteries (150 to 200 W*h/kg) Up to 1,500 charge cycles Not commercially available

8 Lithium-Air Batteries Pros Reacts with the oxygen in the air Stores 700% as much energy as the traditional Li-Ion Cons Lithium reacts violently with water Air from the atmosphere cannot contain water vapor Slow process compared to the Li-Ion html

9 Our Experiment We learned about the batterymaking process and assembled lithium-ion batteries. jpg

10 Our Experiment Google Images Google Images

11 Policy Public Law European Commission Battery Directive International Air Transport Association By 2015, the USA wants 1 million all-electric vehicles on the road. Good batteries could store excess energy generated by renewable energies during peaks and release them during valleys. Google Images

12 Thanks to Duke Energy, Purdue University, Dr. Pol (ViPER Group), and grad students Works Cited "Patent US Rechargeable Magnesium Battery." Google Books. N.p., n.d. Web. 25 June "Rechargeable Magnesium Batteries." Welcome to ARPA-E. N.p., n.d. Web. 25 June "Lithium Air Industries- Advanced Lithium Air Rechargeable Battery Technologies." Lithium Air Industries- Advanced Lithium Air Rechargeable Battery Technologies. N.p., n.d. Web. 25 June "NTT Energy and Environment Systems Laboratories." Lithium Air Battery Main Research Areas. N.p., n.d. Web. 25 June "Rechargeable Lithium-Air Batteries." Welcome to ARPA-E. N.p., n.d. Web. 25 June "Lithium Batteries." IATA. International Air Transport Association, n.d. Web. 25 June 2014.\ "The Mercury-Containing and Rechargeable Battery Management Act." EPA. US EPA, Oswer, Office Of Resource Conservation And Recovery. Web. 25 June "European Commission Battery Directive." PRBA. Official Journal of the European Union, 26 Sept Web. 25 June 2014 "Is Lithium-ion the Ideal Battery?" Advantages & Limitations of the Lithium-ion Battery. N.p., n.d. Web. 25 June "Cars Will Top Computers as No. 1 Lithium Battery Market by 2015."SmartPlanet. N.p., n.d. Web. 25 June "Lithium-ion Battery." Wikipedia. Wikimedia Foundation, 19 June Web. 25 June 2014.