Conductive properties of carbon black conductive agent and carbon nanotubes

Carbon nanotubes and conductive carbon black have their own advantages. Carbon nanotubes excel in electrical conductivity and versatility, making them suitable for applications requiring high performance. Conductive carbon black has obvious advantages in terms of cost and structure, and is suitable for a wider range of applications. When comparing the conductive properties of carbon black conductive agent and carbon nanotube (CNT), it can be analyzed from the following aspects:

The conductive advantage of carbon nanotubes

1. Electrical conductivity: Carbon nanotubes have extremely high electrical conductivity, and their electrical conductivity is related to their helicity. Carbon nanotubes with different helicity can exhibit metallic properties or semiconducting properties and adapt to different application requirements.

2. Conductive network formation: Carbon nanotubes have a large length-to-diameter ratio, which enables them to form an efficient conductive network with a low addition amount, improving the conductivity of the electrode material.

3. Mechanical properties: Carbon nanotubes have excellent mechanical properties, such as high strength and high elastic modulus, which helps to improve the structural stability of electrode materials.

4. Versatility: Carbon nanotubes are not just electrical conductors, but can also enhance other properties of the material, such as thermal conductivity and mechanical strength.

Conductive advantages of conductive carbon black

1. Conductivity classification: conductive carbon black can be divided into conductive carbon black, superconducting carbon black and ultra-conductive carbon black according to conductive capacity, and different types of conductive carbon black are suitable for different application scenarios.

2. Structure: the structure of conductive carbon black is expressed by the oil absorption value, the higher the structure, the easier it is to form a stable conductive network. Fine particle size carbon black has high structure, can form a tight network chain structure, and improve the electrical conductivity.

3. Liquid absorption: For example, acetylene carbon black has good liquid absorption, which can improve the cycle life of the battery.

4. Widely used: conductive carbon black, such as conductive agent SP and acetylene carbon black, has high specific surface area, high structure and high purity, and can be used in the positive and negative electrodes of the battery to improve cycle capacity and service life.

5. Cost advantage: The price of conductive carbon black is relatively low, and the cost effectiveness is significant, which is an important reason for its wide application. Generally, the addition amount of conductive carbon black is 1%-3%, which is slightly higher than the 1.5% addition amount of carbon nanotubes, but its cost is still advantageous.