Anodic protection strategy for zinc ion batteries

Abstract

With the advent of the national dual-carbon strategy, there is a burgeoning demand for large-scale energy storage systems within the national grid. Nevertheless, lithium-ion batteries have been constrained in large-scale energy storage systems due to their limitations, encompassing scarce raw materials, diminished safety profiles, and environmental concerns. In recent years, zinc-ion batteries have emerged as the most promising option for large-scale energy storage systems, owing to their cost-effectiveness, heightened safety attributes, substantial theoretical capacity, and environmental compatibility. Nonetheless, zinc anodes continue to grapple with significant challenges, including dendrite growth, corrosion passivation, and the hydrogen-evolution reaction (HER), which impede the progressive advancement of zinc-ion battery anodes. This paper provides a comprehensive overview of the principal failure modes and mechanisms inherent to zinc anodes derived from an in-depth analysis of their associated issues. Furthermore, it systematically reviews the primary strategies for modifying zinc-negative electrodes, encompassing diaphragm modifications, electrolyte additives, and anode modifications. This endeavor aims to offer insights and support for enhancing zinc-ion battery anodes.