Analysis of Elemental Impurities in Lithium-Ion Secondary Battery Electrolytes Using the ICPE 9800 Series

User Benefits

- The ICPE-9800 Series allows for simultaneous multi-element analysis. - It is possible to accurately and precisely analyze elemental impurities in lithium-ion secondary battery electrolytes. - Lithium-ion secondary battery electrolytes can be injected using a hydrofluoric acid-resistant injection system and an organic solvent torch.

Introduction

Lithium-ion secondary batteries (LIBs) are widely used in mobile devices, electric vehicles, hybrid cars, and more. Impurities in LIB electrolytes can cause a decrease in battery performance and safety. Therefore, in China, the management of elemental impurities in electrolytes using inductively coupled plasma atomic emission spectroscopy (ICP-AES) is required by the HG/T4067-20151) standard. LIB electrolytes are typically composed of lithium hexafluorophosphate (LiPF6) dissolved in an organic solvent, requiring an injection system for organic solvents. However, LiPF6 can hydrolyze to generate hydrofluoric acid (HF), which poses a risk of corrosion to the glass-based injection systems commonly used in ICP-AES. In this Application News, the ICPE-9820, a hydrofluoric acid resistant injection system and an organic solvent torch were used to analyze elemental impurities in LIB electrolytes. Spike recovery tests and replicate analysis were performed to confirm the validity and precision of the analysis.

April 16, 2024 GMT