1 / 12

Building Better Batteries

Building Better Batteries. Brian Kim 5/16/13. Overview. Introduction What are batteries? Objective? Materials and Method Results and Discussion Data and Evidence of the Data Conclusion Future of batteries Literature Cited. Introduction. What are batteries?

lamis
Télécharger la présentation

Building Better Batteries

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Building Better Batteries Brian Kim 5/16/13

  2. Overview • Introduction • What are batteries? • Objective? • Materials and Method • Results and Discussion • Data and Evidence of the Data • Conclusion • Future of batteries • Literature Cited

  3. Introduction • What are batteries? • All batteries are composed of two electrodes connected by an ionically conductive material called an electrolyte. • The use of batteries? • Batteries are now used everywhere in today’s world which goes in vehicles, handheld mobile devices, and many more applications in the world.

  4. Introduction • Objective? • How can scientists achieve the performance that each application demands? • How will batteries be able to power the many other portable devices that will no doubt be developed in the coming years? • How can batteries become a sustainable technology for the future?

  5. Materials • Materials • Used different battery types: • Ni-MH • Lead-acid • Lithium ion • Zinc-air • Lithium organic • Lithium air • Magnesium Sulfur • AI-CFx • Proton battery

  6. Methods • 3 ways the stored energy of a battery can be maximized • 1. By having a large chemical potential difference between the two electrodes • 2. By making the mass (or volume) of the reactants per exchanged electron as small as possible • 3. By ensuring that the electrolyte is not consumed in the chemistry of the battery.

  7. Results • Ni-MH(established): Low voltage, moderate energy density, high power density. • Applications: Portable, a large scale • Lead-acid(established): Poor energy density, moderate power rate, low cost • Applications: large-scale, start up power, stationary • Lithium ion(established): High energy density, power rate, cycle life, costly • Applications: portable, possibly large-scale • Zinc-air(established): Medium energy density, high power density • Applications: large-scale • Lithium-organic(future): High capacity and energy density but limited power rate. Technology amenable to a low cost • Applications: medium- and large-scale, with the exception of power tools • Lithium-air(future): High energy density but poor energy efficiency and rate capability. Technology amenable to a low cost. • Applications: large-scale, preferably stationary • Magnesium-sulfur(future): Predicted, high energy density, power density unknown, cycle life unknown. • AI-CFx(future): Predicted, moderate energy density, power density unknown. • Proton battery(future): Predicted, all organic, low voltage, moderate energy density, power density unknown.

  8. Results: Environmental Impacts • Ni-MH: Nickel not green(difficult extraction/unsustainable), toxic. Not rare but limited recyclable • Lead-acid: High-temperature cyclability limited. Lead is toxic but recycling is efficient to 95% • Lithium-ion: Depletable elements(cobalt) in most applications; replacements manganese and iron are green (abundant and sustainable). Lithium chemistry relatively green (abundant but the chemistry needs to be improved) Recycling feasible but at an extra energy cost • Zinc-air: Mostly primary or mechanically rechargeable.Zinc smelting not green, especially if primary, easily recyclable • Lithium-organic: Rechargeable. Excellent carbon footprint. Renewable electrodes. Easy recycling. • Lithium-air: Rechargeability to be proven. Excellent carbon footprint. Renewable electrodes. Easy recycling. • Magnesium-sulfur: Magnesium and sulfur are green. Recyclable. Small carbon footprint • AI-CFx: Aluminium and flourine are green but industries are not. Recyclable. • Proton battery: Green, biodegradeable

  9. Graph

  10. Chart

  11. Conclusion • The future of batteries. • The next generation of lithium-ion batteries fully based on nanomaterials will soon be here, followed by lithium-air batteries and others using organic materials.

  12. Literature Cited • http://www.uio.no/studier/emner/matnat/kjemi/MENA5020/h08/undervisningsmateriale/BATTERIES.pdf

More Related