Electrolyte decomposition and solid electrolyte interphase revealed by mass spectrometry

Non-aqueous electrolyte liquids such as carbonate solvents have been widely employed in the commercial lithium-ion batteries and development of next-generation rechargeable batteries. The decomposition products organic additive molecules contribute to formation solid interphases (SEIs) on electrode surface, which key impacts battery's electrochemical performance. rational engineering systems demands precise understanding reaction pathways well electrolytes. Mass spectrometry (MS) is a well-established molecular analytical approach that can provide critical information for unambiguous structure assignment based its mass-resolving power. In recent years, application MS battery research has expanding rapidly, providing valuable insights about chemical species generated during operation evolution. This review aims summarize advances technique-based analysis SEIs, thus demonstrate high utility methods characterization systems.