What are the important materials for lithium battery packs?

Introduction to the basic structure of lithium battery packs: important materials: positive electrode, negative electrode, electrolyte, diaphragm structure: round, square; laminated, winding form: polymer (soft packaging), liquid lithium ion (steel shell) The cost of lithium batteries is 30%-40%, which directly affects the energy density and performance of lithium batteries. The negative electrode material needs to be composed of a material with a lower potential related to the lithium electrode, and has a high specific capacity and good charge and discharge reversibility, so as to maintain good dimensional and mechanical stability during the lithium insertion process. Electrolyte The electrolyte plays the role of transporting charge between the positive and negative electrodes, which affects the energy density, power density, wide temperature application, cycle life, safety performance and other factors of the lithium battery pack. Diaphragm The pore diameter of the diaphragm needs to meet good ion permeability, strong liquid absorption and moisture retention, and maintain ion conductivity; at the same time, it has electronic insulation to achieve the mechanical isolation between the positive and negative electrodes. In addition, it should have sufficient puncture strength and tensile Mechanical properties such as tensile strength, corrosion resistance and sufficient electrochemical stability. Currently, the more commonly used materials for lithium battery packs are lithium cobalt oxide, lithium nickel oxide and lithium manganate. The most used material is lithium cobalt oxide, which has good cycle performance and is convenient to manufacture. The disadvantage is that the cobalt compound is more expensive. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.