The Role of Entropy on the Electrochemistry of Entropy-Stabilized Oxides and Their Lithium Storage Mechanism

Abstract

Metals and semimetals oxides have been investigated as an alternative Li-ion battery anode due to their higher energy storage density relative to the state-of-the-art graphite electrodes. Entropy-stabilized oxides have recently gained significant interest due to their high energy and power density, but their mechanism of lithium storage is still poorly understood, in part owing to the difficulty in characterizing the chemical structure at the nanoscale. It has been hypothesized that entropy plays a significant role on the electrochemistry of this class of material. This work aims at investigating the role of entropy in this class of materials, and their Li storage mechanism using solid-state NMR spectroscopy.