Review of ZnO Binary and Ternary Composite Anodes for Lithium-Ion Batteries

Abstract

To enhance the performance of lithium-ion batteries, zinc oxide (ZnO) has generated in-terest as an anode candidate owing to its high theoretical capacity. However, because of its limitations such as its slow chemical reaction kinetics, intense capacity fading on potential cycling, and low rate capability, composite anodes of ZnO and other materials are manufactured. In this study, we introduce binary and ternary composites of ZnO with other metal oxides (MOs) and carbon-based materials. Most ZnO-based composite anodes exhibit a higher specific capacity, rate perfor-mance, and cycling stability than a single ZnO anode. The synergistic effects between ZnO and the other MOs or carbon-based materials can explain the superior electrochemical characteristics of these ZnO-based composites. This review also discusses some of their current limitations. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.