1. For the negative electrode, in addition to using polymers soluble in organic solvents as binders, polymers soluble in aqueous solutions can also be used as binders. Figure 5 is a schematic diagram of the structure of a water-soluble binder poly (acrylamide-co-diallyl dimethyl ammonium chloride) (AMAC). Compared with polyvinylidene fluoride, it has certain advantages, which is conducive to the formation of a more conductive SEI film on the surface of the negative electrode, and the permeability of the organic electrolyte is better.
2. Although the dispersion of the conductive agent is not an important aspect, it cannot be ignored. The influence of the dispersion of the conductive agent on the negative electrode material has been described above, and it also plays the same role for the positive electrode material, affecting the positive electrode capacity and the rate performance of the battery. For example, for LiMn2O4, the use of a new process can better ensure uniform dispersion of the conductive agent, low polarization, high capacity, and good rate performance than the traditional process. The relationship between the capacity and discharge rate of the LiMn2O4 positive electrode sheet prepared by different processes.
3. The ratio of positive and negative electrodes is also different for different raw materials. For example, for natural graphite // LiFePO4, the capacity of the latter should be equal to the sum of the capacity of natural graphite and the charge required for SEI film formation. In addition, the thickness of the electrode has different requirements according to different materials.
4. At present, commercial polymer lithium-ion batteries basically use LiFP6 carbonate solution as a plasticizer. At a higher temperature (80~100℃), it decomposes under the initiation of trace water or alcohol and produces some toxic alkyl fluorinated phosphates. The thermal decomposition is inhibited by the action of Lewis acid or lithium and metal composite oxides.
5. During the formation and circulation of polymer lithium-ion batteries, bloating and other phenomena will also occur. For the case of lithium cobalt oxide as the positive electrode, the bloating phenomenon mainly occurs below 4V, which is caused by the reduction of the electrolyte. Of course, when in the charging state, the positive electrode is in a high valence state and gas will also be generated. The bloating phenomenon of lithium cobalt oxide is significantly lower than that of LiNi0.8Mn0.1Co0.1O2. The latter begins to bloat above 32V. Therefore, for certain users, it is necessary to avoid the generation of bloating. This is a major indicator when selecting materials.

Notes
During the formation process, the composition of the electrolyte has a significant effect on the bloating of the battery. The expansion of lithium-ion batteries assembled from different positive electrode materials stored at 90°C for 4 hours under different charging conditions. In the base gel electrolyte, using 1mol/LLiClO4 EC/PC electrolyte, about 60% of the electrode surface has a gas phase, resulting in separation between the negative electrode active particles and structural destruction; while 1mol/LLiBF4 EC/γ-butyrolactone electrolyte, only a small amount of gas increases, about 3%. Therefore, the shelf time after formation is related to the composition of the electrolyte. Some specific instructions for formation. After formation, pick out the short-circuited battery, then store it for a period of time, and then measure it. If the voltage decays quickly, it means that the battery itself is also short-circuited and must be treated as waste to prevent it from entering the market and causing safety problems.