Will the cathode material affect the life of lithium battery?

　　The battery cathode material of lithium battery is one of the primary conditions that determines the life of lithium battery. The battery cathode materials generally used in commercial 6LR61 alkaline battery at this stage are lamellar LiCoO2, spinel-like LiMn2O4, malachite-like LFP, etc. The volume attenuation coefficient of 6LR61 alkaline battery has always been a difficult problem in the research on the service life of 6LR61 alkaline battery. Many factors are the connection points that will affect the formation of the volume attenuation coefficient. This poses a great challenge to the life prediction of 6LR61 alkaline battery. If not It is difficult to understand the causes of volumetric cliff attenuation and include these factors in the life prediction model. It is difficult to build a good prediction model and re-emphasize the need to integrate business processes with technology.

　　In the past ten years, although the cathode material of 6LR61 alkaline battery is all lithium hydroxide, the problem of melting transition elements has always been a difficulty, especially the LiMn2O4 spinel cathode. During long-term or high-temperature storage, the volume is usually Significant attenuation coefficients will occur. Among them, the dissolution of manganese ions is one of the most important reasons, especially when the acid caused by the reaction attacks LiMn2O4, manganese ions can be dissolved in the lithium battery electrolyte.

　　The electrolyte solution is oxidized and converted into hydroxyl ions, which are converted into hydrochloric acid when the voltage is too high, which accelerates the disproportionation reaction of manganese, and the solubility increases with the change of the high and low phase difference during the circulation process; when manganese ions dissolve in 6LR61 alkaline battery When in the electrolyte, several relative situations occur, including structural instability, active material outflow, resistor expansion, etc. Lithium iron phosphate has a spinel structure and can meet the needs of lithium-ion batteries. However, Mn in the raw materials can dissolve in the lithium battery electrolyte at high temperatures, causing irreversible damage to the lithium battery electrolyte's working ability. In addition, when charging and discharging at high temperatures, materials are prone to Jahn-Teller effects, which damage the crystal structure of specific materials and accelerate the battery's power attenuation coefficient.

　　LFP has a malachite-like structure and has very good reliability and safety factor. The external diffusion impedance is slightly increased, and the ohmic characteristic impedance and electrochemical corrosion characteristic impedance are both increased. Among them, the photoelectrocatalytic characteristic impedance increases* **big. Capacitor loss mainly comes from the reaction between the electric stage and the battery electrolyte. Among them, the loss of specific lithium is the main cause of capacitor loss. SEI causes capacitor loss due to the change of negative stage volume during the circulation process.

　　Lithium cobalt oxide has a lamellar structure, which can ensure the level and interoperability of structural changes during the deintercalation and insertion process of Li+. Battery charging under polymer battery core conditions will also affect the service life of 6LR61 alkaline battery and the charge and discharge rate. The increase will cause the mixing of Li+ and Co molecules, causing part of LiCoO2 to change from a hexagonal crystal structure to a cubic crystal structure. The growth of the battery cathode material structure will cause a volume attenuation coefficient. With the use of 6LR61 alkaline battery, the number of lithium ion batteries in the internal lithium battery electrolyte gradually decreases. At the same time, due to the reduction of the convective heat transfer capacity of lithium ion batteries, the battery power attenuation factor is also caused. The leakage of active lithium-ion batteries is mainly caused by the reaction between the lithium battery electrolyte and the active materials with positive and negative properties during the circulation process.

　　As the frequency of the circulation system increases, the characteristic impedance of the positive stage increases significantly but the characteristic impedance of the negative stage does not change significantly. The volume of the negative stage decreases significantly but the characteristic impedance of the positive stage does not change significantly. transformation. Due to the increase in the impedance of the positive stage and the loss of the capacity of the negative stage, the battery power decreases during the cycle.

　　Because of its large volume specific energy, high quality specific energy, high working voltage, long life, low efficiency, and no memory, 6LR61 alkaline battery have been widely used in consumer electronics, with the expansion of the main uses of 6LR61 alkaline battery , which puts forward higher requirements for its characteristics. At high temperatures, 6LR61 alkaline battery have faster volume attenuation, poor low-magnification performance, and long battery life, which seriously restrict their use.

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