What factors can cause excessive internal resistance of lithium batteries?

Analysis of the reasons for the excessive internal resistance of lithium batteries 1. Process aspects (1) The positive electrode ingredient is too little conductive agent (the conductivity between the material and the material is not good, because the conductivity of lithium cobalt itself is very poor) (2) The positive electrode ingredient is sticky Too much binder (binders are generally polymer materials with strong insulation performance) (3) Too much binder for negative electrode ingredients (binders are generally polymer materials with strong insulation performance) (4) Ingredients Uneven dispersion (5) The binder solvent is incomplete during the batching (not completely soluble in NMP and water) (6) The surface density of the coating drawing is too large (the ion migration distance is large) (7) The compaction density of the lithium battery is too large Large, the roll is too firm. (Rolling is too dead, and some of the active material structure is destroyed) 2. Material (1) The positive electrode material has a large resistance (poor conductivity, such as lithium iron phosphate) (2) The influence of the diaphragm material (the thickness of the diaphragm, the small porosity, (Small pore size) (3) The influence of lithium battery electrolyte material (small conductivity, high viscosity) (4) The influence of positive electrode PVDF material. (Large volume or large molecular weight) Statement: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What are the precautions for using lithium batteries in mobile devices?