Why does lithium battery charge more temperature than discharge?

Why lithium batteries charge at a higher temperature than discharge. Many companies' battery products can be discharged normally at low temperatures, but at the same temperature, the batteries are difficult to charge normally, or even impossible to charge. When lithium ions are intercalated into graphite materials, the first step is to remove solvation, which will consume some energy and prevent lithium ions from diffusing into the graphite. When Li+ exfoliates the graphite material into the solution, there is a solvation process, and the solvation process does not consume energy, so Li+ can quickly exfoliate the graphite. Therefore, the charge acceptability of graphite materials is significantly lower than the discharge acceptability. Lithium battery charging in a low temperature environment has certain risks. As the temperature decreases, the dynamic characteristics of the graphite anode become worse. During the charging process, the electrochemical polarization of the cathode is obviously intensified, and the precipitated metallic lithium is easy to form lithium dendrites, which breaks through the film and causes a short circuit between the anode and the cathode. Try to prevent charging lithium batteries at low temperatures. When the low-temperature battery must be charged, it is necessary to select a low-current charging (such as slow charge) lithium battery as much as possible and fully use the lithium battery after charging, to ensure that the metal lithium precipitate reacts with the graphite negative electrode and reinsert it into the graphite negative electrode. Companies and scientific research institutions in the industry are exploring and solving the problem of low-temperature resistance of batteries, focusing on improving the existing positive and negative material technologies, and creating conditions for low-temperature operation of batteries by increasing the local environmental temperature of the battery. With the further development of this technology, lithium batteries will have further breakthroughs in low temperature environments. Disclaimer: Some pictures and content of the articles published on this site are from the Internet, please contact to delete if there is any infringement. Previous: Lithium batteries usher in new development opportunities