by jared hanley mentor: dr. quinton l. williams learn the basics of c++ programming extract data...
TRANSCRIPT
Creation of a Coin-Cell Battery
By
Jared Hanley
Mentor: Dr. Quinton L. Williams
Mid-Term Aim
Learn the basics of C++ Programming
Extract data columns from large text files and perform algebraic computations with them.
Become familiar with the materials science of batteries.
Develop a recipe for the anode of Coin-Cell using three ingredients.
Long-Term Objective
Modify LiFePO₄ to create a cathode with enhanced conductivity features.
Understand the electrochemistry behind the Coin-Cell battery.
Obtain hands-on experience in the assembly of the battery from initial materials.
Complete a fully-functional, efficient battery.
Coin-Cell Batteries are used in many small scale applications.
They provide optimal voltage for small electronics.
Compact enough for portable devices such as watches, hearing aids, calculators, laser pointers, etc.
How does a Battery Work?
Inside the Coin-Cell (CR2032)
Goal:
Maximize the battery’s voltage through the potentials in the materials.
Anode: PVDF, NMP, Super C45 on Copper
Cathode: Addition of LiFePO₄
Pieces to the Puzzle
Common Lab Equipment
Ingredients we are using:
Anode Consist of:
PVDF – Polyvinylidene fluoride
NMP – N-Methyl-2-pyrrolidone Carbon Black – Super C45
Raman Spectrum on Carbon Black
D- Band
G- Band
Carbon Signature
Experimental Weight Percentages
95% Super C45 5.0% PVDF PVDF (5,000 cps)
Carnage of Anode Slurries
Cathode
Active Ingredient LiFePO₄
Advantages:
Thermal Stability
Long-Life Span
Great Cyclability
Low Toxicity
Carbon Coating on the LiFePO₄
Increases electrochemical performance
Increases ionic conduction
Helps transport electrons quicker during charge and discharge.
Initial Results of Raman Spectrum
Actual Raman Spectra (457.5 μm)
Bai, Y. et al., “Raman study of pure, C-coated and Co-doped LiFePO4”, J. Raman Spectrosc., (31 March 2011): 835. Print.
Experimental Weight Percentages
94.5% LiFePO₄3.5% PVDF2.0% C45
Thank You for being such a great audience!