Facile strategies to utilize FeSO4·7H2O waste slag for LiFePO4/C cathode with high performances
作者： Jianlong Li , Jinhua Wu , Yi Li , Hang Zhao , Taolin Zhao
DOI: 10.1016/J.JTICE.2019.03.002
关键词: Slag 、 Chemical engineering 、 Dispersity 、 Materials science 、 Ferrous 、 Porosity 、 Raw material 、 Composite number 、 Cathode 、 Lithium-ion battery
摘要: Abstract This study proposes two economic and environmental-friendly strategies to synthesize LiFePO4/C composite as cathode for lithium ion battery, by utilizing the byproduct of industrial TiO2, FeSO4·7H2O waste slag, one raw material. And divalent ferrous phosphate, Fe3(PO4)2·8H2O, plays a significant role intermediate. By wet-mill spray-drying method, monodisperse microspheres are obtained with hierarchically porous structure. micro-spherical shows an excellent rate capability cycle performance, initial discharge capacities 153.6, 132.9, 115.1 mAh g−1 at 0.5 C, 5 C 20 C, respectively. The capacity retention remains 88.4% even after 1000 cycles high 10 C. improved conventional hybrid-crystalline precursor is prepared submicron-sized also exhibits comparable capability. Therefore, slag can partially or totally replace analytically pure ones manufacture performance LiFePO4, which low-cost promising option.
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