About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Upcycling Spent Li-ion Battery Cathodes Through Co/Ni Exchange in LiCoO2 Exfoliated Nanosheets |
| Author(s) |
Hsin-Juei Wang, Candace K. Chan |
| On-Site Speaker (Planned) |
Candace K. Chan |
| Abstract Scope |
In response to limited cobalt availability for lithium-ion battery cathodes, this study explores a novel method for upcycling LiCoO2 (LCO). Traditional LCO recycling approaches like pyrometallurgy and hydrometallurgy are energy-intensive. Here, we introduce a new direct upcycling approach using nanosheets obtained from exfoliation of bulk LCO. The nanosheets’ high surface area facilitates cobalt extraction and replacement by nickel. The effectiveness of the cation exchange is investigated using various characterization techniques, including soft X-ray absorption spectroscopy. The nanosheets are reassembled into functional cathode materials and the electrochemical characteristics evaluated. The results show the successful synthesis of Ni-doped LCO (LiCo1-xNixO2, x = 0.11) using this approach. Mn ion exchange into the exfoliated LCO is also investigated with the same method. This study establishes how nanosheet processing can be leveraged for recycling critical battery materials and establishes a new pathway that can be used for converting LCO or low-Co materials to Ni-rich cathodes. |