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Uncovering the secrets of battery performance: working principle and performance evaluation of battery  separator s The components of a battery are a cathode and an anode, which are separated by a separator. The separator is wetted by an electrolyte, which forms a catalyst that facilitates the movement of ions from the  cathode  to the anode during charging and vice versa during discharge. Ions are atoms that have lost or gained electrons and become electrically charged. While ions can pass freely between the electrodes, the separator is a non-conductive insulator.

[Research Background] Formation is a critical step in the manufacturing of lithium-ion batteries. During the formation process, the electrolyte is reduced at the anode, resulting in the formation of a Solid Electrolyte Interphase (SEI) layer. To ensure the stability of the SEI layer, traditional formation processes are typically conducted at low current densities, which are time-consuming and expensive. Optimizing the formation process is essential for balancing battery performance and manufacturing efficiency. However, the optimization of the formation process faces numerous challenges due to the complex relationship between formation parameters and battery aging mechanisms, as well as the high dimensionality of the experimental parameter space and the long feedback cycles.  While traditional views suggest that slower formation conditions help prevent lithium plating, some studies have shown that lithium plating does not necessarily have a negative impact on cycling performance ...

In-depth! Detailed explanation of lithium-ion battery formation technology Lithium-ion battery production requires formation to achieve electrode wetting and full activation of electrode materials. During the first charge, as lithium ions are embedded in the negative electrode, the  electrolyte  components undergo a reduction reaction at the negative electrode to form a stable solid electrolyte interface  film  (SEI film) to prevent irreversible consumption of electrolyte and lithium ions in subsequent cycles. Therefore, this technology is of extraordinary significance to battery performance. The effect of formation directly affects the subsequent performance of lithium-ion batteries, including storage performance, cycle life, rate performance and safety. This article focuses on the technical parameters/methods of formation and its impact on battery performance.

Unraveling the Mysteries of Cylindrical Cell Assembly: A Beginner's Guide Cylindrical lithium-ion cells are integral to powering a vast array of devices, from smartphones to electric vehicles. Understanding the assembly process of these cells not only demystifies the technology but also highlights the precision and innovation involved in their creation. This guide aims to provide a comprehensive overview of cylindrical cell assembly, tailored for those new to the subject. Introduction to  Cylindrical Cells Cylindrical cells are among the most prevalent types of lithium-ion batteries , characterized by their cylindrical shape and metal can packaging. They are favored for their robust mechanical stability, ease of manufacturing, and efficient thermal management. Common sizes include:  18 mm in diameter and 65 mm in length.   21 mm in diameter and 70 mm in length.  46 mm in diameter and 80 mm in length. These dimensions are denoted by the cell's name, providing a quick...

Determined to win ‖ Sun Jie's team from Tianjin University: Micro-multifunctional additives significantly improve the ultra-high voltage performance of 4.8 V nickel-rich cathode and silicon -oxygen anode batteries  In  December  2024  , Professor Sun Jie, Dr. Zhang Yiming of Tianjin University and Dr. Wang Lue of Guolian Automotive Power Battery Research Institute Co., Ltd.  published an online paper in the journal Advanced Energy Materials (impact factor > 24.4) titled "  Trace  Multifunctional  Additive  Enhancing  4.8  V Ultra-High Voltage Performance of Ni-Rich Cathode and SiO  x   Anode Battery  ". The study proposed a functional group integration strategy for the molecular structure design of additives, and developed a single, trace multifunctional electrolyte additive through the active synergy of multiple functional groups and electronic structures.  2-  Cyano  -3-  fluoropyridine...