Investigations of ion diffusion in a cathode of secondary battery LiFePO4/rGO

To improve the electrochemical performance of LiFePO4 (LFP) as a cathode battery material, one way is by mixed the LFP with electronically conductive materials like carbon. We have prepared the LFP sample mixed by carbon rGO. The composition of the mixture are varied as follows: LFP:rGO (a. 100%:0%; b. 90%:10%; c. 80%:20%; d. 67%:33%). We obtained that the addition of rGO into the LFP sample significantly improves its electrical conductivity. For further plans, the investigation of Li+ ion diffusion using muSR is also prominent since the diffusion of Li+ is a basic principle behind the operation of Li-ion batteries. Both values of electrical conductivity and diffusion coefficient of Li+ are the main issues for battery application in industry. In this proposal, a series of ZF, wTF=30 G as well as LF=5 G and 10 G are planned to be measured in the temperature range between 50 and 300 K.