All kinds of prelithium methods are aimed at the whole battery whose first effect of the negative electrode is lower than that of the positive electrode. After the prelithium of the whole battery, the first efficiency can reach the highest level of PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC treatment of positive material half battery. However, for the battery with lower positive first-effect, the above method is basically powerless, because the first-effect of the whole battery is limited by the fact that there is no longer enough space for lithium insertion after the positive electrode is charged. Even if the external lithium supplement, the positive electrode cannot be inserted, so it has no effect.
In order to obtain more reversible capacity, usually PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC can increase the nickel content of ternary material. For example, in the ternary high nickel material, when the molar content of nickel (molar content can represent the ratio of the number of a particle to the total number of particles of the same size of the material) increased to 82%, ternary material 4.2V full battery gram capacity play can reach 200mAh/g.
When the molar content of nickel is increased to 90%, the ternary material 4.2V full battery capacity can reach 205mAh/g. However, the structure of PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC is unstable when nickel content is too much because nickel ion and lithium ion radius are similar.
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