Do you know what high-rate batteries are there?

High-rate batteries generally refer to lithium-ion batteries with a continuous discharge capacity of ≥3C. Lithium-ion batteries are rechargeable high-rate batteries that rely on lithium ions to move between positive and negative electrodes to work. During charging and discharging, Li+ is intercalated and deintercalated back and forth between the two electrodes: when recharging the battery, Li+ is deintercalated from the positive electrode and inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. Generally, batteries containing lithium elements are used as electrodes. It is a representative of modern high-performance batteries. Lithium-ion battery.jpg The characteristic of high-rate batteries is that they can discharge at a high rate. The mainstream of the positive and negative electrode systems are lithium cobalt oxide and graphite systems. Of course, the particle size of active materials is much smaller than that of conventional high-capacity systems. Generally, the particle size D50 of lithium cobalt oxide is 5-6um, and the particle size of graphite is 7-8um. The smaller the particle size, the larger the BET and the higher the reaction activity. The electrolyte system uses a low viscosity, high lithium salt concentration system, and its conductivity is very high. The isolation membrane is mainly based on high porosity and high air permeability. In terms of auxiliary materials, in order to meet the high-rate discharge characteristics of high-rate batteries, it is necessary to add more conductive agents to improve the electronic conductance of the pole pieces. Generally, conductive agents are a mixture of multiple conductive agents. Generally speaking, in terms of material system, in order to achieve rate discharge, both electronic conductivity and ion conductivity must be improved. Once both are improved, it means that the entire chemical system of high-rate batteries is relatively active, and the reaction speed of chemical reactions To be fast, on the other hand, once inside, thermal runaway is more likely to happen. The performance of high-rate battery ①Continuous discharge ability; ②Instant discharge ability; ③Charge ability; ④Cyclic discharge ability; ⑤High and low temperature discharge ability; ⑥Safety performance. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: What should I pay attention to when discharging lithium batteries?