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[Analysis Case] Evaluation of the Composition of Secondary Battery Electrolyte

Qualitative and quantitative analysis of various components contained in the electrolyte.

In the electrolyte of lithium-ion secondary batteries, a combination of high dielectric constant solvents and low viscosity solvents is used to improve electrical conductivity. Additionally, additives and electrolytes (supporting salts) not only facilitate the transport of Li ions but also have the function of forming a film on the electrode surface, requiring various performance characteristics. This paper presents examples of qualitative and quantitative analysis of various components such as solvents, electrolytes, and additives by evaluating the electrolyte itself using ICP-MS, volatile components during electrolyte heating using GC/MS, and the dry residue of the electrolyte using TOF-SIMS.