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3. Graphene

Since winning the Nobel Prize in 2010, graphene has received widespread global attention, especially in China. There has been a wave of research and development in China for graphene, which has many excellent properties, such as good transparency, excellent conductivity, high thermal conductivity, and high mechanical strength.

The potential applications of graphene in lithium-ion batteries include:

Used as a negative electrode material. Graphene has a high gram capacity, with a reversible capacity of about 700mAh/g, which is higher than the capacity of graphite negative electrodes. In addition, the good thermal conductivity of graphene ensures its stability in the battery system, and the interlayer spacing of graphene is greater than that of graphite, allowing for smooth diffusion of lithium ions between graphene layers, which is beneficial for improving battery power performance. Due to the immature production process and unstable structure of graphene, there are still certain problems with graphene as a negative electrode material, such as low initial discharge efficiency of about 65%; Poor cycling performance; The price is relatively high, significantly higher than traditional graphite negative electrodes.

As a positive and negative electrode additive, it can improve the stability of lithium-ion batteries, extend cycle life, and increase internal conductivity.

Given the current immature mass production process, high price, and unstable performance of graphene, graphene will be the first to be used as a positive and negative electrode additive in lithium-ion batteries.

4. Carbon nanotubes

Carbon nanotubes are a type of graphitized carbon material with excellent electrical conductivity. However, due to their small depth and short travel during lithium removal, they are less useful as negative electrode materials for polarization during high rate charging and discharging, which can improve the high rate charging and discharging performance of batteries.

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