| About this Abstract |
| Meeting |
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Symposium
|
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Presentation Title |
Scalable Fabrication of Carbon Fiber-Based Cathode with Networked Heterostructures for Structural Energy Storage Composites |
| Author(s) |
Hamed Fallahi, Ayush Raj, Farshad Bozorgmehrian, Homero Castaneda, Amir Asadi |
| On-Site Speaker (Planned) |
Hamed Fallahi |
| Abstract Scope |
Carbon fibers, with their exceptional qualities, are appealing to explore storage of electrical energy within fiber-reinforced composites. Li ions can be absorbed and intercalated into the carbon fiber structure making these fibers a suitable structural anode in lithium-based systems. In this battery design, active cathode materials are deposited on the carbon fibers of neighboring plies serving as the structural cathode. This study describes a method to graft commercial carbon fibers with assemblies of lithium iron phosphate acting as the cathode active material, functionalized carbon nanotubes as conductive network, and polyvinylpyrrolidone (PVP) as the binder agent with weight ratio of 90:5:5, respectively. Favorable interactions of these particles in the Dimethylformamide (DMF) solvent enable formation of dispersed sub-micron structures in the solution. After electrostatic self-assembly, a uniform, macroscale coating was achieved with electrophoretic deposition (EPD). Several coating morphologies were investigated to understand trade-offs associated with system properties. It is shown that CNTs can effectively interconnect active materials and carbon fiber both electronically and mechanically. Electrochemical results show promising performance, with reversible capacities as high as 126 mAh/g after 200 cycles. The excellent rate and cycle performance of cells in multiple C-rates can be attributed to the proposed cathode architecture influenced by small wt% CNT networks. Results indicate positive synergistic effects present in the proposed methodology that enables scalable fabrication of structural cathodes, alongside the flexibility of tuning the morphological characteristics.
This material is based upon work supported by the National Science Foundation under Grants #1930277 and #2143286. Use of the Texas A&M University Soft Matter Facility (RRID:SCR_022482) is acknowledged. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |