|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Materials for Energy Conversion and Storage 2022
||Impact of Low Operating Temperatures on the Performance of Li-ion Batteries
||Amani Alhammadi, Amarsingh Bhabu Kanagaraj, Prerna Chaturvedi, Daniel Choi
|On-Site Speaker (Planned)
At subzero temperatures, the performance of lithium (Li)-ion batteries declines rapidly, resulting in less capacity and shorter cycle life. This is attributed to the freezing of the non-solid electrolyte, which leads to unstable solid electrolyte interphase (SEI) film formation and weak permeation of electrolyte into the active material. Electrolyte freezing results in a significant decrease in the diffusivity of lithium ions and a substantial increase in the charge-transfer resistance. In this research, the behavior of Li-ion batteries at subzero temperatures is investigated by employing electrochemical characterization methods such as cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge-discharge. Material characterization methods such as X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) are also used to examine the change in the electrode and the electrolyte to determine the reasons behind the performance degradation. Optimization methods are proposed to solve the issues that hinder the use of Li-ion batteries in subzero-temperature environments.
||Energy Conversion and Storage, Composites, Characterization