About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Powder and Ceramic Materials Science
|
Presentation Title |
Surface-engineered CeO2 Nanocrystals as Cathode Host for High-performance Li-S Battery |
Author(s) |
Zhen Wei, Ruigang Wang |
On-Site Speaker (Planned) |
Zhen Wei |
Abstract Scope |
Lithium sulfur battery (Li-S) is recognized as one of the most promising candidates that can replace lithium ion battery. In this research, shape-controlled synthesis of CeO2 nanocrystals with various preferentially exposed crystal facets (CeO2 nanorods with (110)/(100)/(111), CeO2 nanocubes with (100) and CeO2 nanoctahedra with (111)) was conducted aiming to investigate the crystal plane effect of polar CeO2 as a cathode host on the immobilization of lithium polysulfides and electrochemical performance of the assembled Li-S batteries. A strong chemical bonding of sulfur species on the exposed (110)/(100) and defected (111) crystal facets of CeO2 nanorods, during electrochemical conversion from long-chain lithium polysulfides to insoluble short-chain Li2S/Li2S2, results in superb restriction of lithium polysulfides and endows CeO2 nanorods based electrode with the best electrochemical properties. The working mechanism of lithium polysulfides immobilization by addition of CeO2 nanorods will be discussed in detail. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, Powder Materials, Characterization |