Conductive Carbon Black agent is a uniform dispersion of carbon black in a solvent, while carbon nanotubes are dispersed in a solvent with carbon nano as the conductive agent.
Conductivity Advantage of Carbon Nanotubes:
The conductivity of carbon nanotubes is related to its helicity, and there is a difference in its conductivity depending on the helicity. Carbon nanotubes can exhibit semiconductor and metal properties. The conductivity of carbon nanotubes and the length of the diameter determines its suitability as a conductive agent for lithium-ion electrode materials, its own conductivity coupled with the length of the length of the diameter makes it easier to form a conductive lattice, in the lower additive amount can achieve good results.
Conductive carbon black conductive advantage:
Conductive carbon black can be divided into carbon black, super conductive carbon black and special conductive carbon black according to the strength of the conductive ability. The oil absorption value is generally used to indicate the structural properties of carbon black, the larger the structure, the easier it is to form a conductive grid pathway that is difficult to destroy. The finer the particle size of the carbon black structure, the higher the degree, the closer the formation of mesh chains between the particles, the more likely to form a conductive structure. Currently conductive carbon to conductive agent SP and acetylene carbon black-based.
Conductive carbon black SP has high specific surface area, high structure, high purity, can be used in positive and negative electrodes, the appropriate amount of additions can effectively improve the battery cycle capacity and service life, there is no effect on the electrochemical mechanism.
Acetylene carbon black has better liquid absorption, which helps to improve the cycle life.
Generally, the additive amount of conductive carbon black is 1%-3% of the positive and negative electrodes, while the additive amount of carbon nanotubes is 1.5%. At present, new conductive agents such as carbon nanotubes and carbon black, a traditional conductive agent compared to the urgent need to reduce costs to meet the demand. At present, most manufacturers are happy to choose carbon black as a conductive agent, in addition to the excellent conductive properties of carbon black itself, the low price is also the reason for its selection.
