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How does electrolytic manganese sheet improve the performance of lithium-ion batteries?

Ways in which electrolytic manganese sheet improves the performance of lithium-ion batteries
Characteristics of manganese that affect battery performance
Manganese has unique chemical properties and electrochemical behaviors in lithium-ion batteries, which enables electrolytic manganese sheet to play an important role in batteries. Manganese has a variety of oxidation states, the most common of which are +2, +3 and +4. In lithium-ion battery electrode materials, the transition between different oxidation states of manganese can achieve the insertion and extraction of lithium ions, thereby participating in the battery's charge and discharge process. For example, lithium manganese oxide (LiMn₂O₄) is a common lithium-ion battery positive electrode material, in which the manganese element undergoes an oxidation state change during the charge and discharge process, realizing the storage and release of lithium ions.

Specific manifestations of improving the performance of lithium-ion batteries
Improve battery capacity
Increase active sites: As part of the electrode material, electrolytic manganese sheet can provide more active sites for the storage of lithium ions. In the electrode reaction, more active sites mean that more lithium ions can be accommodated, thereby increasing the theoretical capacity of the battery. For example, when electrolytic manganese sheets are applied to positive electrode materials, the presence of manganese can make the electrode material have a higher specific capacity, thereby increasing the capacity of the entire battery.
Optimize electrode structure: The use of electrolytic manganese sheets can help build an electrode structure that is more conducive to lithium ion transmission and storage. Through a reasonable preparation process, manganese can work synergistically with other elements to form a stable crystal structure or nanostructure, which can effectively increase the specific surface area of ​​the electrode material and increase the contact area between lithium ions and the electrode material, thereby increasing the actual capacity of the battery.
Improve the cycle performance of the battery
Stabilize the electrode structure: In the charging and discharging process of lithium-ion batteries, the structural stability of the electrode material is crucial. Manganese can play a role in stabilizing the structure in the electrode material and inhibit the structural changes and collapse of the electrode material during the cycle. Taking lithium manganate as an example, the presence of manganese enables the material to maintain a relatively stable crystal structure during the charge and discharge cycle, reducing the capacity attenuation caused by structural changes, thereby increasing the cycle life of the battery1.
Inhibit side reactions: The use of electrolytic manganese sheets can inhibit the occurrence of side reactions inside the battery. During the battery charging and discharging process, some side reactions may occur between the electrode and the electrolyte, which will consume lithium ions and electrolyte, resulting in a decrease in battery performance. Manganese can form a stable protective film on the electrode surface to prevent direct contact between the electrode and the electrolyte, thereby reducing the occurrence of side reactions and improving the battery's cycle stability.

Improve battery safety
Thermal stability: Manganese has good thermal stability. When the internal temperature of the battery rises, the electrode material containing electrolytic manganese flakes can better withstand high temperatures and reduce the risk of thermal runaway. This is because manganese can inhibit the decomposition and oxidation reactions of electrode materials at high temperatures to a certain extent, maintain the stability of the battery's structure and performance, and thus improve the safety of the battery.
Overcharge protection: Electrolytic manganese flakes can also play a certain protective role when the battery is overcharged. When the battery is overcharged, manganese can participate in some redox reactions, consume excess charge, prevent the internal voltage of the battery from being too high, and avoid safety accidents such as battery explosion or fire.

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Electrolytic manganese flakes