Fabrication of Li(Ni–Zn–Mn)O2 layered cathode material for energy conversion and storage performance in lithium-ion batteries

Abstract

In this work, newly designed and synthesized the zinc incorporated lithiated metal oxide cathode material for controlling the cost, improving capacity retention, and better safety. The Li(NixZnyMn1-x-z)O2 material prepared via the hydrothermal process and employed as a positive electrode for Li-ion rechargeable batteries. The stoichiometric ratio of the material is derived as Li(Ni0·3Zn0·2Mn0.5)O2 (NZM). The Li(Ni0·3Zn0·2Mn0.5)O2 is constructed as a cathode electrode, which was assembled as a coin type (CR2032) batteries and it has been delivered a charge capacity of 135 mAh g−1 during Li-ion insertion and discharge capacity of 134 mAh g−1 while Li-ion de-insertion process in the first cycle, respectively. The initial coulombic efficiency has been reached 99.2% at the C/10 rate within the voltage window between 2.5 and 4.2 V vs. Li/Li+. The improved electrochemical properties of Zn incorporated Li(Ni0·3Zn0·2Mn0.5)O2 layered cathode material is attributed to the high electronic and ionic conductivity and unique surface morphological architecture. So, it may be a suitable cathode material for application in Li-ion batteries.