What factors are related to the cycle life of lithium battery?

The cycle life of lithium battery means that the rechargeable battery in a certain electric flow standard to carry out a certain frequency battery charging cycle system, its characteristics of the attenuation coefficient to a certain total number of time length.Battery recycling So what factors are related to the cycle life of lithium battery?

The cycle life of lithium battery is affected by many factors. First of all, the accumulation of lithium metal is an important influence factor. When lithium ions are transferred to the surface of the negative electrode,cylindrical cell assembly machine they cannot enter the active material of the negative electrode for some reasons, thus forming stable chemical substances. These chemicals accumulate on the surface of the negative electrode and no longer participate in the subsequent cycling process, resulting in a reduction in battery capacity.

Secondly, the dissolution of the positive electrode material also affects the cycle life of lithium batteries. Although the lithium hydroxide containing as cathode material has sufficient stability,battery making machine it will continue to dissolve during long-term use. This dissolution will produce a certain amount of catalytically active substances and flammable gases, destroying the capacity balance between electrodes and leading to irreversible capacity loss. This phenomenon is especially obvious in the case of overcharging, and sometimes even violent dissolution and gas release can occur, which not only affects the battery capacity, but also causes serious safety hazards.

In addition, the impact of the electrolyte solution is also an important factor in the cycle life of lithium batteries. In the continuous cycling process, due to the limitations of chemical stability and heat resistance, the electrolyte solution will continue to dissolve and evaporate. Accumulated over a long period of time, the total amount of electrolyte solution decreases, which cannot fully wet the positive and negative electrode materials, and the charging reaction is not complete, leading to a reduction in the actual usable capacity.

Finally, external application factors will also have an impact on the cycle life of lithium batteries. Lithium batteries have certain conditions and ranges of use, such as cut-off charging voltage, charging multiplier, operating temperature range, storage temperature range and so on. However, in actual use, the phenomenon of over-limit abuse is very common. Long-term unreasonable use will lead to irreversible chemical reactions within the battery, destroying the battery system, accelerating battery aging, resulting in a significant reduction in cycle life, and in serious cases, may even cause safety accidents.

To summarize, the cycle life of lithium batteries is affected by various factors such as the accumulation of lithium metal, the dissolution of cathode materials, the influence of electrolyte solution and external application factors. In order to extend the service life of lithium batteries, we should pay attention to the rational use of batteries, avoiding such bad behaviors as over-limit abuse and over-charging. At the same time, the development of more stable and durable lithium battery materials and electrolyte solution is also an important direction to improve the cycle life of lithium batteries.