Uploaded May 2017 | Updated September 2026, 4 hours ago
While the idea of using the sun’s energy as a source of propulsion is not new, it was only with the first successful solar sail demonstration in 2010 that the idea became a reality. Solar sails have been proposed for use in extraplanetary voyages throughout the solar system, delivering cargo loads and human assets to space stations. Modern spaceflight is limited by the power of rocket engines and the amount of fuel a spacecraft can carry. However, solar sails provide a solution by allowing propellant free transportation. The material, therefore must be able to withstand the uncertainty of and move through space using the optical pressure from the rays of the sun or high energy laser beams. With the increased publicity and popularity of SpaceX as well as the idea of a colony on Mars, solar sails could be the immediate solution to lowering dead loads on spacecrafts as amounts of fuel needed to traverse large distances would be severely reduced.
The most common use of solar energy is a solar panel converting photons to electricity; therefore, learning that solar sails use photons as a method of propulsion was an incredibly interesting idea. Solar sails utilize radiation pressure due to the electromagnetic waves produced by the sun. Photons reflect off the sail with a small percentage being absorbed. This fact makes solar sails extremely efficient as most of the photons that come in contact with the surface collide elastically and give additional momentum to the sail. While solar radiation may provide a relatively small push on the spacecraft, the continuous push from the photons will accelerate the aircraft, making high speeds possible.
We will examine the materials used to construct and utilize Solar Sails. The video will discuss how solar sails work and the properties that make solar sails possible. We will explore the plausibility of implementation into existing and future spacecrafts as well as the extent of a solar sail’s efficiency, with an ideal solar sail being perfectly flat with 100% specular reflection meaning the complete elimination of photon absorption by the sail. We will also discuss possible improvements such as the elimination of curvature, wrinkles and cheapening the materials needed for construction and maintenance. Another topic to be considered will be imperative problems such as deceleration after significant momentum is achieved as well as ensuring the sail does not tear when coming into contact with micrometeorites and other undetectable spatial debris.
By Colton Sheehan, Hamza Kakeh, Jane Long, Meaghan McGowan
Works Cited:
images.nasa.gov/#/details-CubeSat%20Mission-%20Near-Earth%20Asteroid%20Scout%20(animation%20only,%20no%20audio).html
longwallpapers.com/Desktop-Wallpaper/rocket-wallpapers-background-For-Desktop-Wallpaper.jpg
http://i.imgur.com/7lQjnPl.jpg
popularmechanics.com/space/deep-space/a6407/4346578
http://coolcosmos.ipac.caltech.edu/ask/268-How-much-did-the-Space-Shuttle-weigh-
news.nationalgeographic.com/2016/02/160202-solar-sail-space-nasa-exploration
planetary.s3.amazonaws.com/sites/lightsail/images/homebg.jpg
nanowerk.com/nanotechnology/introduction/introduction_to_nanotechnology_22.php
intechopen.com/books/carbon-nanotubes/carbon-nanotube-membrane-solar-sails-a-challenge-for-extremely-fast-space-flight
planetary.s3.amazonaws.com/sites/lightsail/images/homebg.jpg
universetoday.com/wp-content/uploads/2011/01/solar-sail.jpg
ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20000059207.pdf
orbitalvector.com/Deep%20Space%20Propulsion/Solar%20Sails/Solar%20Sails.htm
intechopen.com/books/carbon-nanotubes/carbon-nanotube-membrane-solar-sails-a-challenge-for-extremely-fast-space-flight
forbes.com/sites/jillianscudder/2016/07/23/astroquizzical-solar-sails-work/#1707bb461d36
lunarsail.com/solar-sails
news.nationalgeographic.com/content/dam/news/2016/02/03/solar_sail/05solar_sail.adapt.1190.1.jpg
space.com/26011-solar-sail-tech-space-exploration.htmlhttp://www.centauri-dreams.org/wp-content/uploads/2011/08/gossamer_512.jpg
http://www.niac.usra.edu/files/studies/final_report/333Christensen.pdfhttps://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20000059207.pdf
https://www.a-star.edu.sg/portals/61/images/Research/MSE/msefig2.png
While the idea of using the sun’s energy as a source of propulsion is not new, it was only with the first successful solar sail demonstration in 2010 that the idea became a reality. Solar sails have been proposed for use in extraplanetary voyages throughout the solar system, delivering cargo loads and human assets to space stations. Modern spaceflight is limited by the power of rocket engines and the amount of fuel a spacecraft can carry. However, solar sails provide a solution by allowing propellant free transportation. The material, therefore must be able to withstand the uncertainty of and move through space using the optical pressure from the rays of the sun or high energy laser beams. With the increased publicity and popularity of SpaceX as well as the idea of a colony on Mars, solar sails could be the immediate solution to lowering dead loads on spacecrafts as amounts of fuel needed to traverse large distances would be severely reduced.
The most common use of solar energy is a solar panel converting photons to electricity; therefore, learning that solar sails use photons as a method of propulsion was an incredibly interesting idea. Solar sails utilize radiation pressure due to the electromagnetic waves produced by the sun. Photons reflect off the sail with a small percentage being absorbed. This fact makes solar sails extremely efficient as most of the photons that come in contact with the surface collide elastically and give additional momentum to the sail. While solar radiation may provide a relatively small push on the spacecraft, the continuous push from the photons will accelerate the aircraft, making high speeds possible.
We will examine the materials used to construct and utilize Solar Sails. The video will discuss how solar sails work and the properties that make solar sails possible. We will explore the plausibility of implementation into existing and future spacecrafts as well as the extent of a solar sail’s efficiency, with an ideal solar sail being perfectly flat with 100% specular reflection meaning the complete elimination of photon absorption by the sail. We will also discuss possible improvements such as the elimination of curvature, wrinkles and cheapening the materials needed for construction and maintenance. Another topic to be considered will be imperative problems such as deceleration after significant momentum is achieved as well as ensuring the sail does not tear when coming into contact with micrometeorites and other undetectable spatial debris.
By Colton Sheehan, Hamza Kakeh, Jane Long, Meaghan McGowan
Works Cited:
images.nasa.gov/#/details-CubeSat%20Mission-%20Near-Earth%20Asteroid%20Scout%20(animation%20only,%20no%20audio).html
longwallpapers.com/Desktop-Wallpaper/rocket-wallpapers-background-For-Desktop-Wallpaper.jpg
http://i.imgur.com/7lQjnPl.jpg
popularmechanics.com/space/deep-space/a6407/4346578
http://coolcosmos.ipac.caltech.edu/ask/268-How-much-did-the-Space-Shuttle-weigh-
news.nationalgeographic.com/2016/02/160202-solar-sail-space-nasa-exploration
planetary.s3.amazonaws.com/sites/lightsail/images/homebg.jpg
nanowerk.com/nanotechnology/introduction/introduction_to_nanotechnology_22.php
intechopen.com/books/carbon-nanotubes/carbon-nanotube-membrane-solar-sails-a-challenge-for-extremely-fast-space-flight
planetary.s3.amazonaws.com/sites/lightsail/images/homebg.jpg
universetoday.com/wp-content/uploads/2011/01/solar-sail.jpg
ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20000059207.pdf
orbitalvector.com/Deep%20Space%20Propulsion/Solar%20Sails/Solar%20Sails.htm
intechopen.com/books/carbon-nanotubes/carbon-nanotube-membrane-solar-sails-a-challenge-for-extremely-fast-space-flight
forbes.com/sites/jillianscudder/2016/07/23/astroquizzical-solar-sails-work/#1707bb461d36
lunarsail.com/solar-sails
news.nationalgeographic.com/content/dam/news/2016/02/03/solar_sail/05solar_sail.adapt.1190.1.jpg
space.com/26011-solar-sail-tech-space-exploration.htmlhttp://www.centauri-dreams.org/wp-content/uploads/2011/08/gossamer_512.jpg
http://www.niac.usra.edu/files/studies/final_report/333Christensen.pdfhttps://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20000059207.pdf
https://www.a-star.edu.sg/portals/61/images/Research/MSE/msefig2.png
![Lithium Ion Batteries in Electric Vehicles
By Austin Anderson, Lewei He, Kiri Nicholson, and Brooke Noeska
Adoption of electric cars has been on the rise for the past decade due to the substantial advances that have been made by improvement of technology. The greatest challenges regarding electric cars are their batteries. Finding a balance between battery life, weight, rechargeability, and cost has proven to be a significant issue.
This video focuses on lithium-ion batteries used in electric vehicles. First, we provide a quick survey of electric vehicle designs. We then discuss chemistry, physics, and material science behind basic design of lithium-ion batteries. Next, we look at challenges that electric vehicles and the batteries face, which is the balance between adequate energy storage and weight of the battery.
How do we solve these challenges? The answer to this question lies within the material science paradigm triangle, which looks at property, processing, and structure. One key aspect in performance of the battery is the use of silicon versus graphite anodes, in which lithium ions are absorbed. Considering properties, graphite is more stable while silicon can absorb more ions, although they sometimes absorb too much and fail due to the mechanical stress. Considering processing, silicon films as thin as 20nm can absorb nearly the maximum amount of ions while limiting the amount of load the ions create. Finally, in a structural view, research has shown that small amount of tin in silicon anodes can greatly enhance capacity. Similarly, silicon-graphene anodes are another option with improvements in capacity and stability. In this perspective, the way to improve performance is clear: thinner silicon sheets with small amount of tin.
Lithium ion batteries hold a lot of advantages over other types of power sources. Compared to gasoline, vehicles produce less emission by using power that may be generated by renewable and nuclear energy. Compared to other batteries, lithium-ion provides high energy density by weight, relatively low amount of toxic and hazardous elements, and a good cycle durability.
The future of electric vehicles is immense, and with advancements in material science, lithium-ion batteries will likely continue to provide the energy that not only drives cars, but also drives the growth of the market of electric vehicles.
References:
Armand, M., & Tarascon, J. (2008). Building Better Batteries. Nature: International
Weekly Journal of Science. doi:10.1038/451652a (Kiri, 4)
Bonheur, K. (2016, November 09). Lithium ion battery: Advantages and disadvantages.
Retrieved April 13, 2017, from
http://www.versiondaily.com/lithium-ion-battery-advantages-disadvantages/
(Kiri 7)
Fuel Cells (n.d.). Retrieved April 29, 2017 from
http://www.iop.org/resources/topic/archive/fuel/ (Lewei)
Gordon-Bloomfield, N. (n.d.). Drive a Solar-Charged Electric Car, Save $263,000 On Fuel Over 50 Years? Retrieved May 06, 2017, from http://www.greencarreports.com/news/1072774_drive-a-solar-charged-electric-car-save-263000-on-fuel-over-50-years (Austin)
Is Lithium-ion the Ideal Battery? (n.d.). Retrieved April 13, 2017, from
http://batteryuniversity.com/learn/archive/is_lithium_ion_the_ideal_battery
(Kiri)
Johnson, D. (2016, March 31). Silicon and Graphene Combo Finally Achieve
Lithium-Ion Battery Greatness. Retrieved April 29, 2017, from http://spectrum.ieee.org/nanoclast/semiconductors/materials/potential-of-silicon-and-graphene-together-for-liion-electrodes-realized (Brooke)
Lithium-ion batteries: Capacity might be increased by six times. (2016, August 8).
Retrieved April 29, 2017, from https://phys.org/news/2016-08-lithium-ion-batteries-capacity.html (Brooke)
Nightingale, S. (2016, August 03). Next generation anode to improve lithium-ion
batteries. Retrieved April 29, 2017, from https://techxplore.com/news/2016-08-anode-lithium-ion-batteries.html (Brooke)
Patent US20110269021 - Lithium ion battery. (n.d.). Retrieved April 13, 2017, from
https://www.google.com/patents/US20110269021 (1, Kiri)
Poole, I. (n.d.). Lithium Ion Battery Advantages & Disadvantages. Retrieved April 13,
2017, from
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Schalkwijk, W. A., & Scrosati, B. (2002). Advances in lithium-ion batteries
[0-306-47508-1]. Retrieved April 13, 2017, from
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2&dq=lithium ion
batteries&ots=iPe1E1imBy&sig=SWZFulm00zK0mR3dnmfZDxnitoA#v=onepage
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Found online via Google Books, used first part of book that was available for free
(2, Kiri)
US Census Bureau. (2012, September 3). Industry Statistics. Retrieved April 29,
2017, from https://www.census.gov/econ/isp/sampler.php?naicscode=447&naicslevel=3 (Brooke)
Full formal citations, including media:
https://docs.google.com/document/d/1sCPeQ1gHOVPE0COEYim5HV6xPzWtWXbF5XOx9km1w-I/edit?usp=sharing Lithium Ion Batteries in Electric Vehicles](https://i.ytimg.com/vi/x4qzxTEeCWU/mqdefault.jpg)


