Analysis of Electrolyte and Electrode in LIB Degraded by Overcharge and High Temperature

User Benefits

- ICP-AES enables accurate quantification of cathode material dissolved in electrolytes. - GC-MS assesses degradation from components in electrolytes with unknown usage. - EDXRF easily evaluates transition metals, phosphorus, fluorine, and other elements deposited on electrodes.

Introduction

When lithium-ion batteries are used in EVs or ESS applications, numerous cells are connected in series and parallel to form modules, and multiple modules are further connected to construct a pack. In such configurations—where many cells are connected in series—the state of charge of individual cells varies. Moreover, because the cells are densely packed to reduce volume, the ambient temperature experienced by each cell also varies. In this application, we conducted cycle tests under overcharged or high-temperature conditions, disassembled the degraded pouch cells, and analyzed both the electrolytes and the electrodes.

January 20, 2026 GMT