Analysis of battery electrolytes and N-methyl-2-pyrrolidone (NMP) via headspace GC-FID

User Benefits

- Analysis of battery electrolytes and N-methyl-2-pyrrolidone (NMP) without tedious sample preparation using HS-20NX - Automatic switching of the carrier gas type for full flexibility and gas consumption control can be realized using the gas selector for Nexis GC-2030

Introduction

The increasing demand for electronic portable devices and electronic vehicles makes production and performance monitoring of batteries a major task these days. Lithium-ion battery electrodes are created using dispersions, so-called slurry compositions, which consist of the active material for the electrode and other ingredients such as binders and conductive agents. The solvent widely used for basic slurry compositions is N-methyl-2-pyrrolidone (NMP), as this dissolves polyvinylidene fluoride (PVDF), the most frequently utilized binder in the cathode slurry formulation. The lithium-ion battery itself does not contain NMP as it is recovered from the exhaust gases and re-used. Consequently, the degree of purity of NMP and the absence of it in the battery electrolyte is important to produce a high- performance battery. Additionally, knowing the general composition of the electrolyte is essential to improve ion transport and monitor the related battery life. The analysis of battery electrolytes regarding their composition and NMP content as well as purity testing of 2-methyl-2-pyrrolidone via headspace GC-FID are presented.

September 24, 2023 GMT