High-Voltage-driven Li/Mn-rich Li1.2Mn0.6Ni0.1Co0.1O2 Cathode with nanocomposite blend gel polymer electrolyte for long cyclic stability of rechargeable Li-battery

Abstract

Li/Mn-rich layered oxide is an attractive cathode material for Li-ion battery due to its low cost, high specific capacity, and high working potential. In this paper, the high capacity layered Li/Mn-rich NMC cathode (Li1.2Mn0.6Ni0.1Co0.1O2) and nanocomposite blend gel polymer electrolytes (NBGPEs) are synthesized by using the sol-gel method and solution casting technique, respectively. XRD results confirm that the cathode material has a well-defined hexagonal layered structure. It is observed that the synthesized NBGPE containing 2 wt.% SiO2 nanofiller exhibits maximum ionic conductivity (5.2 mS cm−1), Li-ion conductivity (~2.40 mS cm−1), and wide electrochemical stability (~5.4 V vs Li/Li+) at 30°C. The electrochemical performance of the cell (Li/NBGPE#1/Li1.2Mn0.6Ni0.1Co0.1O2) has been investigated by cyclic voltammetry and galvanostatic charge–discharge measurement. The cell delivers maximum specific discharge capacity of 212.0 mAh g−1 at 0.1C and good rate performance within 2.0-4.8 V. At 0.2C, the cell shows stable coulombic efficiency ~98% after 200th cycle due to better interfacial stability between NBGPE#1 and the electrode. © 2022 John Wiley & Sons Ltd.