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How to control the temperature during the discharge process of rate based batteries is also a very important issue. During high current discharge, lithium-ion batteries will generate a large amount of heat, and the accumulation of heat inside the lithium-ion battery will lead to an increase in temperature and a large temperature gradient. Therefore, the inconsistent internal degradation of lithium-ion batteries will affect their lifespan. How to choose a suitable structure becomes particularly important.

④ Improving the ionic conductivity of electrolytes

Lithium ions need to shuttle back and forth between the positive and negative electrodes, just like swimming in a swimming pool composed of an electrolyte and a battery shell. The ion conductivity of the electrolyte is the same as the resistance of water, which has a significant impact on the speed of lithium ion swimming. At present, the organic electrolytes used in lithium-ion batteries, whether they are liquid electrolytes or solid electrolytes, have low ionic conductivity. The resistance of electrolytes has become an important component of the overall battery resistance, and its impact on the high rate performance of lithium-ion batteries cannot be ignored.

By selecting appropriate materials, formulas, and structures, the internal impedance and polarization of lithium-ion batteries during high rate discharge can be reduced, temperature unevenness can be reduced, and the rate performance of the battery can be effectively improved. Improving the magnification performance is a comprehensive project that needs to be considered from multiple factors. What the editor has introduced is just a drop in the bucket, and there may be omissions due to limited knowledge. I hope all friends can criticize and correct me, and put forward my own views.

⑤ Reduce the internal resistance of the battery

Conductive agents are generally added inside the positive electrode active material to reduce the contact resistance between the active materials and between the active material and the positive electrode substrate/collector, improve the conductivity of the positive electrode material (ion and electron conductivity), and enhance the rate performance. Conductive agents of different materials and shapes can affect the internal resistance of lithium-ion batteries, thereby affecting their rate performance.

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