Rechargeable batteries!. By: Jasmina (Nina) Jovanovic. Chemistry behind batteries:. Battery – a group of two or more galvanic cells connected in series 1. Disposable batteries - primary cell ( cannot be recharged)
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Rechargeable batteries! By: Jasmina (Nina) Jovanovic
Chemistry behind batteries: Battery – a group of two or more galvanic cells connected in series 1. Disposable batteries - primary cell ( cannot be recharged) 2. Rechargeable batteries- secondary cell ( can be recharged) A galvanic cell - spontaneously produce electric current Half cell= electrode + electrolyte
Chemistry behind batteries: • A battery with two electrodes voltaic cell. • Electrical current runs in between the battery’s two electrodes • Electrolyte - in liquid or solid state • Electrolyte- contains ions
Chemistry behind batteries: What are rechargeable batteries? • Known as storage batteries due to their ability to accumulate and store energy • Group of one or more electrochemical cells • Known as secondary cells since its electrochemical reactions are electrically reversible • Standard power source for today’s products • Exist in many shapes and sizes
Chemistry behind batteries : • Batteries made up of plates • Device connects= electrons move to the +’ve side Secondary cell: • External source of electrical energy is required • Redox reaction needs to be reversed • Allows it to be reused
Current produces through an electrochemical reaction involving anode, cathode, and electrolyte • Electrons flow from one electrode to another through an electrolyte • Outside source is used to apply the electrical energy to a secondary cell • (-) to (+) electron flow that happens during discharge is reversed, and the cell’s charge is restored.
The Different Types of Rechargeable Battery:-Nickel Cadmium (NiCd)-Nickel Metal Hydride (NiMH)-Lithium-ion (Li-ion)- Sealed Lead Acid (SLA) • Better option than disposable batteries • Reduce the amount of waste generated
Advantages of using Rechargeable batteries: • Help the environment • Convenience • Cost efficient • Better performance
Disadvantages of using rechargeable batteries: • Charging • Hazard • Uses
Methods that should be used for disposing batteries: • Alkaline and carbon-zinc batteries, and individual NiMH batteries =disposed with the regular household trash. • Batteries that are before1996 ( large amount of mercury)=hazardous waste • Button batteries containing mercury oxide, silver oxide and zinc-air cells, and sealed lead-acid batteries=hazardous waste. • Avoid disposing too many batteries, together at once • Car batteries that contain lead should be brought only to waste management centres.
Impact of the rechargeable batteries in portable electronic devices on society: • New electronics • No need for changing batteries constantly • Provides people with more powerful, reliable, and reusable-costing. • Many portable electronic devices use only rechargeable batteries • Helped many companies develop in many industries
Resources: • Jewell, E. (2010, 13). LIVESTRONG.COM. BATTERY DISPOSAL METHODS. Retrieved March 22, 2013, from http://www.livestrong.com/article/148016-battery-disposal-methods/ • (2012, 30). CalRecycle . Rechargeable Batteries and Chargers: A Personal Perspective. Retrieved March 24, 2013, from http://www.calrecycle.ca.gov/ReduceWaste/power/rechbattinfo.htm • Jarrett, J. (2013, ). Battery Chargers and the Benefits of Rechargeable Batteries. Retrieved March 24, 2013, from http://battery-charger-review.toptenreviews.com/battery-chargers-and-the-benefits-of-rechargeable-batteries.html • Jarrett, J. (2011, 15). Battery Force. The Different Types of Rechargeable Battery. Retrieved March 25, 2013, from http://blog.battery-force.co.uk/battery-news/the-different-types-of-rechargeable-battery/ • Story, J. (2009). What are rechargeable batteries. Retrieved from http://www.informinc.org/fact_battery.php • Everyday chemistry. (n.d.). Retrieved from http://www.humantouchofchemistry.com/how-do-rechargeable-batteries-work.htm • DERDERIAN , C. RECHARGEABLE BATTERY CHEMISTRIES. Retrieved March 25, 2013, from http://www.des.pf/itereva/disciplines/sti/prod/apsecondes/FTP/TP%20HnD%20-%20Week%203/files/Docs/Rechargeable_battery_chemistries.pdf