Temperature effect on electrochemical properties of lithium manganese phosphate with carbon coating and decorating with MWCNT for lithium-ion battery

Abstract

The ever-increasing demands for higher energy density and higher power capacity of Li-ion secondary batteries have led to a search for electrode materials whose capacities and performance are better than those available today. One candidate is lithium manganese phosphate, and it is necessary to understand its transport properties. These properties are crucial for designing high-power Li-ion batteries. In order to analyze the effect on the electronic conductivity with a conductor material, carbon nanotubes multiwalled, and glucose were used as a carbon source. Here the transport properties of LiMnPO 4 , LiMnPO 4 /C, and LiMnPO 4 /MWCNT are investigated using impedance spectroscopy. The electronic conductivity is found to increase with increasing the temperature from 2.92 x 10 − 5 S cm − 1 to 6.11 x 10 − 5 S cm − 1 . The magnetization curves are investigated, and antiferromagnetic behavior below 34K is reported for the three compositions. The structural characterizations were explored to con rm the phase formation of material with XRD, TEM, and SEM