Realizing Li-ion full cells with LiFePO_4 cathode and Mn_3O_4- mesoporous carbon composite anode for energy storage applications

摘要

In the present work, an eco-friendly and low-cost lithium-ion full cell assembled using Mn_3O_4-mesoporous (MnMC)composite anode and LiFePO_4 cathode (LFP) is investigated for energy storage applications. Hydrothermally synthesizedMn_3O_4 nanoflakes with a length of 40-50 nm are physically mixed with mesoporous carbon (MC) to obtain MnMCnanocomposite, and sol-gel method in the presence of citric acid is employed to synthesize the cathode material LiFePO_4.The structural and morphological details of LFP cathode are investigated using X-ray diffraction (XRD) and field emissionscanning electron microscopy (FE-SEM) techniques and the electrochemical performance is evaluated by assembling halfcells with lithium metal as the counter electrode. The MnMC nanocomposite is pre-lithiated and combined with LFPcathode for the full lithium ion cell with a cathode limiting capacity. The LFP-MnMC full cells exhibit reversible capacityof the LFP cathode and show good cycling stability with a capacity retention of 66% and the average Coulombic efficiencyis found to be 98% after 100 cycles.