新威技術 Company Profile

The LR44 battery is a small yet high-performance alkaline button battery that is utilized in various applications. It has a diameter of 11.6mm, a height of 5.4mm, and a nominal voltage of 1.5V, providing a reliable power source for a diverse range of devices such as calculators, thermometers, toys, and medical equipment. Equivalent models include AG13, A76, 357, and 76A, which also offer high compatibility to meet various needs. With proper handling and storage, it is possible to extend the battery's lifespan. Additionally, the new Wei battery tester CT-9000-5V5A achieves high-precision charge and discharge testing and is equipped with multidimensional testing functions such as internal resistance measurement and evaluation of electrochemical properties. This contributes to the improvement of device and battery performance.

This paper explains the processes of electron conduction and ion diffusion in lithium-ion batteries. Within the battery, electrons move through the external circuit, while ions diffuse internally, triggering electrochemical reactions. To optimize performance, it is crucial to suppress the polarization phenomena that occur during charging and discharging, and to improve the interfacial properties of the materials. The ion diffusion rate determines the reaction rate of the battery, so it is necessary to accurately evaluate its characteristics. Therefore, the Galvanostatic Intermittent Titration Technique (GITT) is used to measure the ion diffusion coefficient. GITT analyzes the relationship between the battery's potential and time, providing information about reaction kinetics. In the tests, a constant current pulse is applied, and the diffusion of ions to reach equilibrium is observed after the current is stopped. GITT is based on Fick's laws of diffusion and is a method for evaluating ion diffusion rates. In the experiments, it is important to use small current pulses and allow for relaxation time to achieve stable potential changes. Additionally, the GITT method has been applied to the study of lithium iron phosphate composite electrodes and aqueous zinc-ion batteries, demonstrating that specific structural characteristics (e.g., porous structures) promote ion diffusion and enhance battery performance.