| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Functional Nanomaterials 2020: Translating Innovation into Pioneering Technologies
|
| Presentation Title |
Graphene Coating on Ni-rich Cathode Materials to Improve Energy Density of Electrode for Lithium-ion Battery |
| Author(s) |
Young-Jun Kim, Chang-Won Park, Jung-Hun Lee, Soo-Min Hwang |
| On-Site Speaker (Planned) |
Young-Jun Kim |
| Abstract Scope |
Over the last few decades, layered cathode materials (e.g., LiMO2, M=transition metals) have been widely used for commercial lithium-ion batteries(LIBs). The specific capacity of layered oxide materials can be improved by increasing the Ni concentration and with high content of Ni (Ni ≥ 80%), a reversible capacity of 200mAh/g or more can be achieved. Despite benefits and research into Ni-rich layered cathode materials, they still suffer from thermal and structural instabilities. These induce significant dissolution of the transition metals and oxygen evolution during operation at elevated temperatures, leading to rapid capacity fading during cycling. To resolve the current problems associated with Ni-rich layered cathode materials, we developed a simple graphene coating process, which effectively prevent the dissolution of transition metals during operation and/or storage at elevated temperature. Furthermore, graphene coating significantly increase energy density of cathode by removing conducting agents from cathode. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |