Insights into the efficient roles of boron-containing additives for Li-ion batteries

Adding electrolyte additives are widely recognized as a cost-effective and efficient way to enhance the functionality of electrode-electrolyte interfaces, resulting in improved electrochemical performance of lithium-ion batteries (LIBs). Boron-containing compounds typically exhibit one or more of the following effects, including the ability to form a stable electrode-electrolyte interface, promote the dissociation of LiPF6, reduce LiF deposition, reduce the content of HF, and inhibit O2 evolution in the cathode at high voltages. Therefore, they have attracted considerable attention as additives in various types of electrolytes. This article presents a comprehensive review of the latest advancements and progress made in the field of boron-containing additives for LIBs. Specifically, we discuss five representative types of boron-containing electrolyte additives, including organic borates, lithium salt-based boron compounds, boroxine, boranes, and other minor additives, and focus on their improvements to the electrode-electrolyte interfaces on electrode surfaces and electrochemical performance in LIBs. Furthermore, we present future research directions for the advancement of boron-containing compounds as functional electrolyte additives. The objective of this review is to offer a thorough evaluation of the present research status in this particular field, serving as both a fundamental reference for understanding the existing landscape and a practical guide for selecting appropriate additives for real-world applications.