Sun Yuhan, Zhao Qiang, Luo Chunhui, Wang Guixin, Sun Yan, Yan Kangping
School of Chemical Engineering, Sichuan University, Chengdu 610065, China.
School of Mechanical Engineering, Chengdu University, Chengdu 610106, China.
ACS Omega. 2019 Jun 6;4(6):9932-9938. doi: 10.1021/acsomega.9b01074. eCollection 2019 Jun 30.
A novel method whose starting materials was Fe-P waste slag and CO using a closed-loop carbon and energy cycle to synthesize LiFePO/C materials was proposed recently. In the first step, Fe-P slag was calcinated in a CO atmosphere to manufacture Fe(PO), in which the solid products were tested by XRD (X-ray diffraction) analysis and the gaseous products were analyzed by the gas detection method. In the second step, as-synthesized Fe(PO) was further used as the Fe and P source to manufacture LiFePO/C materials. Also, the influence of the preparation conditions of Fe(PO), including calcination time and calcination temperature, on the energy storage properties of as-obtained LiFePO/C was investigated. It was found that the LiFePO/C materials, which was synthesized from Fe(PO) obtained by calcining Fe-P waste slag at 800 ° for 10 h in CO, exhibited a higher capacity, better reversibility, and lower polarization than other samples. The discharge capacity of as-obtained LiFePO/C can reach 145 mAh/g at 0.1 C current rate. This work puts forward an environment-friendly method of manufacturing LiFePO/C cathode materials, which has a closed-loop carbon and energy cycle.
最近提出了一种新颖的方法，该方法以铁磷废渣和一氧化碳为起始原料，利用闭环碳和能量循环来合成LiFePO/C材料。第一步，将铁磷渣在一氧化碳气氛中煅烧以制备Fe(PO)，其中固体产物通过XRD（X射线衍射）分析进行测试，气态产物通过气体检测方法进行分析。第二步，将合成的Fe(PO)进一步用作铁和磷源来制备LiFePO/C材料。此外，还研究了Fe(PO)的制备条件，包括煅烧时间和煅烧温度，对所得LiFePO/C储能性能的影响。结果发现，由在800℃的一氧化碳中煅烧铁磷废渣10小时得到的Fe(PO)合成的LiFePO/C材料，比其他样品表现出更高的容量、更好的可逆性和更低的极化。所得LiFePO/C在0.1C电流倍率下的放电容量可达145 mAh/g。这项工作提出了一种制造LiFePO/C正极材料的环境友好方法，该方法具有闭环碳和能量循环。
