![]() ![]() When the metal element at the anode accumulates to a certain extent, the hard edges and corners of the deposited metal will pierce the separator, causing the battery to self-discharge. After the redox potential of the element, these metals will be oxidized at the cathode and then reduced at the anode. When there are metal impurities such as iron (Fe), copper (Cu), chromium (Cr), nickel (Ni), zinc (Zn), silver (Ag) in the lithium ion cathode battery materials, the voltage of the battery formation stage reaches these metals. ![]() 1.The metal foreign body is mixed into the cathode material At present, the marketed lithium ion battery cathode materials include lithium cobalt oxide, lithium manganate, lithium iron phosphate and ternary materials. Compared with other raw materials for lithium-ion batteries, the variety of cathode materials is more diverse, the production process is more complex, and the risk of quality failure is greater, so the requirements for its quality management are higher. This article discusses the common failure modes of cathode materials for lithium-ion batteries and the corresponding preventive measures from the perspective of material users. The serious harm caused by these failure modes to the battery performance is clarified, and how to avoid these failures is explained from the perspective of quality management, so as to further prevent the occurrence of quality problems and improve the quality of lithium-ion batteries.Īs we all know, the cathode material is one of the key core materials of lithium-ion batteries, and its performance directly affects the performance indicators of lithium-ion batteries. This article introduces several failure modes of lithium ion battery cathode materials that have a significant impact on the performance of lithium ion batteries, such as mixed metal foreign matter, excessive moisture, and poor batch consistency. The ternary cathode material used to prepare the ternary lithium battery, as a kind of lithium ion battery cathode materials, will also affect the battery consistency and safety issues. ![]() The performance of lithium-ion batteries is closely related to the quality of the cathode material. The batch uniformity of lithium ion battery cathode materials is poor.The moisture content of lithium ion battery cathode materials exceeds the standard.The metal foreign body is mixed into the cathode material. ![]()
0 Comments
Leave a Reply. |