Study on LiFe1 − xSmxPO4/C used as cathode materials for lithium-ion batteries with low Sm component
Version 2 2024-06-03, 10:35Version 2 2024-06-03, 10:35
Version 1 2015-03-12, 14:35Version 1 2015-03-12, 14:35
journal contribution
posted on 2024-06-03, 10:35authored byW Wang, Y Qiao, L He, L Dumee, Lingxue KongLingxue Kong, M Zhao, W Gao
LiFe1 − xSmxPO4/C cathode materials were synthesized though a facile hydrothermal method. Compared with high-temperature solid-phase sintering, the method can allow for the fabrication of low Sm content (2 %), a scarce and expensive rare earth element, while the presence of an optimized carbon coating with large amount of sp2-type carbon sharply increases the material’s electrochemical performance. The high-rate dischargeability at 5 C, as well as the exchange current density, can be increased by 21 and 86 %, respectively, which were attributed to the fine size and the large cell parameter a/c as much. It should be pointed out that the a/c value will be increased for the LiFePO4 Sm-doped papered by both of the two methods, while the mechanism is different: The value c is increased for the front and the value a is decreased for the latter, respectively.