Facile Synthesis Method of Self‐Assembled Ni‐Rich LiNi0.8Mn0.1Co0.1O2/rGO Composite for High‐Performance Li‐Ion Batteries

Abstract

A hybrid material, LiNi0.8Co0.1Mn0.1O2, with excess lithium and wrapped in reduced graphene oxide (rGO), has been synthesized through ultrasonication employing Triton X as a surfactant. The ultrasonication process breaks down the initially clustered large particles into small nanoparticles, ensuring a uniform composite with reduced graphene oxide. With a consistent capacity retention of 87.56% over 100 cycles, the cathode composite exhibits a promising initial capacity of around 250 mAh g−1 at 0.1 C. Notably, the composite has high‐rate capability, providing capacities of 230 and 178.9 mAh g−1 at 0.2 and 2 C, respectively. These experimental results indicate that the well‐dispersed LiNi0.8Co0.1Mn0.1O2 nanoparticles and the porous reduced graphene oxide framework work in concert to enhance the electrochemical performance of the reduced graphene oxide‐wrapped LiNi0.8Co0.1Mn0.1O2 cathode material, which was achieved through ultrasonication with Triton X (TX‐100) surfactant assistance. This synergy allows for the fast diffusion of both Li ions (Li+) and electrons (e−) while also allowing volumetric variations during the introduction and withdrawal of Li ions (Li+). As a result, the fabrication of this reduced graphene oxide‐wrapped LiNi0.8Co0.1Mn0.1O2 cathode material shows promise as a high‐rate cathode material, especially for energy storage applications.