About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2023
|
Presentation Title |
Fabrication and Electrochemical Characterization of Si-C Hybrid Nanocomposites for High-performance Li Ion Batteries |
Author(s) |
Aamna Hameed, Daniel Choi |
On-Site Speaker (Planned) |
Aamna Hameed |
Abstract Scope |
Commercially used graphite anodes in Lithium-ion batteries (LIBs) have low theoretical specific capacity of 372mAh g−1. Therefore, silicon (Si) can be considered as an effective anode material due to its high theoretical specific capacity of 4200 mAh g−1 and suitable working potential of ∼0.4 V vs. Li/Li+. However, Si-based anode exhibits a serious problem of capacity decay due to volume expansion during charging cycles (about 400% of its original size). The current work is aimed to solve this issue (volume expansion) by encapsulating Si nanoparticles by carbon (Si-C). Polydopamine is used as an encapsulant to provide pathway for Li+ ion transport and buffer Si volume expansion during electrochemical cycling. The structural and morphological properties of Si-C are evaluated using techniques such as X-ray diffraction (XRD) and scanning electron microscopy (SEM). The fabricated Si-C anode demonstrated a high initial discharge capacity of ~3500 mAh g-1 reflecting its promising nature for LIBs. |
Proceedings Inclusion? |
Planned: |
Keywords |
Composites, Energy Conversion and Storage, Characterization |