Download Nanowire Supercapacitors

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Transcript
NANOWIRE SUPERCAPACITORS
SUPERCAPACITORS THAT CAN HOLD CHARGE FOR LONGER AND CHARGE FASTER
NANO SCIENCE TECHNOLOGY CENTER, DEPARTMENT OF MATERIAL SCIENCE AND
ENGINEERING, AND COLLEGE OF OPTICS AND PHOTONICS, UNIVERSITY OF CENTRAL FLORIDA
OBJECTIVES
• Sustainable energy storage
• Fast charging batteries for electric
cars
• Cellphones with batteries that
charge faster and last longer
• Wearable technologies
“core/shell nanowire supercapacitors based on an array of onedimensional (1D) nanowires seamlessly integrated with conformal
2D TMD layers”
Choudhary, N., Li, C., Chung, H.-S., Moore, J., Thomas, J., & Jung, Y. (2016). High-Performance One-Body
Core/Shell Nanowire Supercapacitor Enabled by Conformal Growth of Capacitive 2D WS 2 Layers.
ACS Nano, acsnano.6b06111. https://doi.org/10.1021/acsnano.6b06111
DISCOVERIES
• By coating 1D nanowires with 2D transition-metal dichalcogenides
(TMDs) creates highly conductive supercapacitors.
• These new supercapacitors can be recharged over 30,000 times
compared to lithium ion batteries, which can only be charged 1,500
times.
• The core is highly conductive, which creates to high electron transfer,
leading to fast charging. The 2D coated outer shell leads to high
energy transfer and the ability to hold power.
• This process has worked really well to make supercapacitors
compared to other 2D materials like graphene have had little success.
YouTube Video
• This is a video showing a
process using graphene to
make a supercapacitors.
• Although process and
others like it showed
promise there was little
success.
• However, with how this
process configures the
nanomaterials is has
shown a lot of promise.
YouTube Video explaining the process of using nanomaterials to make
supercapacitors and how this could change the world for the better
W-BASED NANOWIRE SUPERCAPACITOR
This picture shows the fabrication process and the structure of the core/shell nanowires. Also, an
image of the mechanical properties of the supercapacitors with a corresponding SEM image. In
the lower right hand corner shows Raman spectra and the XRD pattern of the material.
LINKS TO CLASS
•
•
In class, we talked about how nanomaterials have large surface area per unit volume or
mass.
•
Capacitors work by storing energy in the form of an electric charge, which is just a
concentration of electrons
•
A supercapacitor, as the name suggests, can store much more energy than normal
capacitors
•
Because the nanowires have very large surface area per unit volume, they can store
many more electrons (more charge) per unit volume as well
We also learned this semester about oxidation reactions
•
This process uses an oxidation reaction to produce nanowires of tungsten (VI) oxide
from tungsten foil
•
The capacitor is then formed by coating the oxide with tungsten (IV) sulfide
REFERENCES
• Choudhary, N., Li, C., Chung, H.-S., Moore, J., Thomas, J., & Jung, Y. (2016). HighPerformance One-Body Core/Shell Nanowire Supercapacitor Enabled by Conformal Growth
of Capacitive 2D WS 2 Layers. ACS Nano, doi:/10.1021/acsnano.6b06111
• Eye-Spy Focus. (2013). NanoTech: Graphene “SemiConductor, UltraCapacitor” Super
Batteries - YouTube. Retrieved from https://www.youtube.com/watch?v=PuHrUnCOWWo
• University of Central Florida. (2016). A Phone That Charges in Seconds? UCF Scientists Bring
it Closer to Reality. Retrieved from http://today.ucf.edu/phone-charges-seconds-ucfscientists-bring-closer-reality/
Document related concepts

Rutherford backscattering spectrometry wikipedia, lookup

Upconverting nanoparticles wikipedia, lookup

Gaseous detection device wikipedia, lookup

Auger electron spectroscopy wikipedia, lookup