A brief and rapid method of synthesizing LiFePO4/C for lithium ion battery

In the present, battery is one of the promising electrical energy storage. The most widely used is a rechargeable lithium ion battery. However, some challenges, such as explosive and non-environmentally friendly material of lithium ion battery need further research in innovation. LiFePO4/C as cathode of battery offers an answer to overcome the limitations due to its advantages of environmentally friendly material, abundant material, high thermal stability, and long cycle. Solid state and co-precipitation are the easiest method to synthesize LiFePO4/C in industrial scale due to it doesn’t use lot of complicated equipment. The co-precipitation method is able to remove water-soluble impurities. This study concerns on crystallinity, morphology, and electrochemical properties which are analyzed by X-Ray Diffractometer, Scanning Electron Microscopy, and Electrochemical properties, respectively. From the XRD pattern, the peak of LiFePO4/C are in accordance to the jcpds card no. 083-2092, but there still presence an impurity of Fe2O3. Based on SEM images, the range of particle sizes from the solid state method is 0,72 µm to 4,92 µm with the most particle distribution at 0,72 µm. Whereas, the range of particle sizes from the co-precipitation method is 0,32 µm to 1,32 µm with the most particle distribution at 0,61 µm. The FTIR patterns shows that the H2O and PO43− bonds are formed in both methods. Based on the electrochemical performances, the initial discharge capacity of LiFePO4/C from co-precipitation method is greater 9,3 mAh/g than the solid state method 2,5 mAh/g.