The in-situ battery technology for secondary batteries is a technique for real-time monitoring of the internal reaction process of batteries, which is of great significance for understanding the working principle of batteries and optimizing battery performance.

principle

The in-situ cell technology for secondary batteries is based on electrochemical principles. By constructing a micro reaction cell that allows real-time monitoring of the battery during charging and discharging, and utilizing characterization techniques such as spectroscopy and mass spectrometry, the dynamic changes of internal electrode materials, electrolyte, and other components of the battery are captured. For example, through Raman spectroscopy or infrared spectroscopy, key processes such as the evolution of electrode material structure and the generation of electrolyte decomposition products can be monitored in real time, providing direct evidence for revealing battery failure mechanisms.

construction

In situ tanks are usually composed of components such as anode body, cathode base, sealing gasket, and compacted conductive device. The anode body and cathode base are connected by threads to form a sealed cavity, which houses components such as the test sample, diaphragm, and lithium sheet inside. The compacted conductive device ensures good contact between the test sample and the electrode through structures such as metal protrusions and springs, while preventing electrolyte leakage through sealing gaskets. Some in-situ cells also integrate optical windows for easy spectral signal acquisition.

Application Progress

In recent years, in-situ cell technology has made significant progress in the field of secondary battery research. The Xiamen University team conducted in-depth research on key processes such as lithium metal surface desolvation and electrolyte decomposition into films by building an in-situ/working condition battery characterization spectroscopy platform and combining various electrochemical in-situ spectroscopy characterization methods. In addition, in-situ cell technology is also applied in fields such as lithium rich electrolyte design and solid-state battery interface research. Through in-situ monitoring, researchers can more accurately understand the complex reactions inside the battery, providing theoretical support and technical guidance for the development of high-performance secondary batteries.