The importance of expanded graphite in the field of new energy vehicles is increasingly prominent
Expanded graphite is a type of graphite material that has undergone special treatment and has the characteristic of being able to expand under specific conditions. Expanded graphite is usually prepared from natural flake graphite through processes such as intercalation, water washing, drying, and high-temperature expansion. Its appearance is worm-like, with a gray-white surface, and it has excellent properties such as high-temperature resistance, oxidation resistance, conductivity, thermal conductivity, and lubrication.
With the continuous improvement and optimization of the preparation process, the expansion performance and stability of expanded graphite have been further improved, making its sealing effect more reliable in harsh environments such as high temperature and high pressure. In addition, researchers are constantly exploring the composite application of expanded graphite with other materials to improve the comprehensive performance of sealing materials.
In practical applications, expanded graphite has been successfully applied to seal various high-temperature equipment, such as furnaces, pipelines, valves, etc. When these devices operate at high temperatures, expanded graphite can quickly expand and fill gaps, forming an effective sealing layer to prevent the leakage of gases, liquids, or solid particles.
In addition to traditional application fields, expanded graphite has also shown broad application prospects in emerging fields. For example, in the field of new energy vehicles, expanded graphite can be used for thermal isolation and sealing of batteries, improving their safety performance. In the aerospace field, the high-temperature sealing performance of expanded graphite also has important application value.
Advantages of using expanded graphite in the field of new energy vehicles
New energy vehicles, especially electric and hybrid vehicles, have extremely high requirements for battery performance and safety. Expanded graphite, a material with excellent conductivity, thermal conductivity, and reversibility, can effectively improve the charging and discharging performance and safety performance of lithium-ion batteries.
Firstly, expanded graphite plays a crucial role in thermal isolation and heat dissipation in new energy vehicle batteries. As the battery is charged and discharged, a large amount of heat will be generated. If the heat cannot be effectively dissipated, it may decrease battery performance and even cause safety issues. The high thermal conductivity of expanded graphite makes it an ideal heat dissipation material, which can quickly dissipate the heat inside the battery and ensure its stable operation.
Secondly, expanded graphite also has important applications in the sealing and protection of batteries. The leakage of electrolytes inside the battery or the invasion of external moisture and impurities can have a serious impact on the performance and safety of the battery. Expanded graphite has good sealing performance, which can effectively prevent electrolyte leakage inside the battery and also prevent harmful substances from entering from the outside.
In addition, expanded graphite can also improve battery energy density and cycle life. Its excellent conductivity can reduce batteries' internal resistance and improve their charging and discharging efficiency. At the same time, its reversibility allows the battery to maintain good performance after multiple charges and discharges.
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