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Published byDenis Myles King Modified over 8 years ago
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SWCNTs and their Application to Lithium-ion Batteries Brian Holler – John Carroll University, Howard REU
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Why LiFePO4 Batteries? Light-weight Rechargeable ~150 W*h/kg Hold their charge (only ~5% loss per month) Hundreds of charge/discharge cycles
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Lithium-Ion Batteries LiFePO4 active material in cathode Graphite/Carbon Black active material in anode Electrolyte to enable the reversible reaction
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Single-walled Carbon Nanotubes High aspect ratio High electrical conductivity High mechanical strength and resilience
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Why SWCNTs? Nanometer scale allows for short lithium diffusion times Increases battery life Increase safety Mechanically reinforcing it Preserving electrical contact with current collector
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Battery Manufacturing Process Making the “slurry” Cathode: 80% LFP-10% CB-10% PVDF Anode: Many different ratios of Graphite, CB, and PVDF Coating ~20 m thick
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Battery Manufacturing Process
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Battery Assembly Vacuumed Box Crimped
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Acquiring Data Arbin System Charge at 250 A Charge to 3.6V
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Progress Optimizing for comparison Ratios of chemicals Mixing times Spreading Heating
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Future Plan with SWCNTs Characterize SEM and Raman Incorporate the SWCNTs 99% Metallic 60% Metallic 1% Metallic Challenges How to add them to the electrode
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Thank you Adewale Adepoju – Howard University GA Dr. Searles Dr. Williams
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