Analyze the structure and principle of lithium batteries

1. The essential materials of the basic structure of lithium battery: positive electrode, negative electrode, electrolyte, diaphragm structure: round, square; laminated, winding form: polymer (soft packaging), liquid lithium ion (steel shell) 2. Working principle of lithium battery Cathode material: LiMn2O4, negative electrode material: Li+ in the positive electrode and Li+ in the electrolyte are concentrated on the negative electrode during graphite charging, and electrons are obtained, which are reduced to Li and embedded in the carbon material of the negative electrode. During discharge, Li embedded in the carbon material of the negative electrode loses electrons and enters the electrolyte, and the Li+ in the electrolyte moves to the positive electrode. 3. Principle of lithium battery packaging ① Positive structure LiMn2O4 (lithium manganate) + conductive agent (acetylene black) + binder (PVDF) + current collector (aluminum foil) positive electrode ② negative structure graphite + conductive agent (acetylene black) + adhesive Mixture (PVDF) + current collector (copper foil) negative electrode 4. During the charging process, the power supply charges the battery. At this time, the electron e on the positive electrode runs from the external circuit to the negative electrode, and the positive lithium ion Li+ jumps from the positive electrode into the electrolyte. Climbing through the small winding hole in the diaphragm, swimming to the negative electrode, and combining with the electrons that have ran over. The reaction on the positive electrode is LiMn2O4u003du003dLi1-xMn2O4+Xli++Xe (electrons) The reaction on the negative electrode is 6C+XLi+Xeu003du003dLixC65. During the discharge process, the battery is discharged, and the electron e on the negative electrode passes through the The circuit ran to the positive pole, and the positive lithium ion Li+ jumped from the negative pole into the electrolyte, crawled through the twisty hole in the diaphragm, swam to the positive pole, and combined with the electrons that had run over long ago. The reaction on the positive electrode is Li1-xMn2O4+xli++xe (electron)u003du003dLiMn2O4 The reaction on the negative electrode is LixC6u003du003d6C+xLi+xe Disclaimer: Some pictures and content of articles published on this site are from the Internet, such as If there is any infringement, please contact to delete the previous article: Should the car battery have electricity?