Prospective Application, Mechanism, and Deficiency of Lithium Bis(oxalate)Borate as the Electrolyte Additive for Lithium‐Batteries

Abstract

Lithium bis(oxalate)borate (LiBOB) is one of the most common film‐forming electrolyte additives used in lithium ion batteries (LIBs), since it can form a dense boron‐containing polymer as a solid electrolyte interlayer (or cathode electrolyte interlayer) in order to isolate the electrode material from the electrolyte and prevent side reactions. LiBOB can serve as HF scavenger to maintain the structural integrity of electrodes via avoiding the transition metal dissolution caused by HF attack. LiBOB also can react with LiPF6 to generate lithium difluoro (oxalate)borate (LiDFOB) that can be further used as a clean‐up agent for reactive oxygen radicals. This article lists the application of LiBOB in high capacity and high voltage cathode materials, and also reviews the working mechanisms of LiBOB used in these materials to improve the performance of LIBs. Finally, it presents the current shortcomings of LiBOB and strategies to overcome these. This article is expected to provide useful insights for employing LiBOB as a feasible method of dealing with the difficulty of running high capacity LIBs stably under high voltage.

Perspective on Recent Advances of Functional Electrolytes for Lithium Metal Batteries

“…In recent years, a variety of methods have been deliberately designed to enhance the electrochemical/physicochemical properties of electrolytes. With the tailoring and changing of the solvation chemistry of electrolytes, high-concentration electrolytes (shorted as HCEs), localized high-concentration electrolytes (shorted as LHCEs), , electrolytes composed of novel solvent molecules, − and functional additives ,− were designed. Those functional electrolytes demonstrated dramatically improved electrochemical stability when coupled with lithium anodes and high-voltage cathodes.…”

Recent Progress on Multifunctional Electrolyte Additives for High‐Energy‐Density Li Batteries – A Review

“…[7][8][9][10] The electrolyte is an important part of the LIB system, known as the "blood" of the battery, and it has a significant impact on the capacity, cycling stability, rate performance, electrode/electrolyte interface performance, and other battery performance. [4,[11][12][13][14][15] Since the emergence of LIBs in the 1990s, non-aqueous carbonate electrolytes dominated the lithium electrolyte market for nearly 30 years, with LiPF 6 as the salt and ethylene carbonate (EC), dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), diethyl carbonate (DEC) etc. as the solvents.…”

Binder design strategies for cathode materials in advanced secondary batteries

“…1b, considering these challenges, various intrinsic modification methods have been explored, such as surface coating, 30,31 doping, 32,33 concentration gradient structure, 34 single crystal structure, 35,36 and adding appropriate electrolyte additives. 37 In addition, supplementing lithium by incorporating Li 2 O, LiF, etc. can compensate for the Li loss due to the formation of a solid electrolyte interface (SEI) film.…”