Standards Development
This part of IEC 62565 establishes a detail specification and format listing the key control characteristics (KCC) including physical, chemical, electronic properties of graphene-CNT suspension used for conductive active agent in Lithium-ion battery applications. For each KCC listed, the characteristic quantity value is given based on the application performance and the practical requirements coming from industrial field, and the methods and existing standards for their measurement are reported.
Two types of products of "anode materials in lithium-ion battery (H2O-based)" and "cathode materials in lithium-ion battery (NMP-based)" are included
The technology of lithium-ion battery is developing rapidly driven by the industrial application of the newenergy vehicles power battery in large scale, and the new materials as upstream industrial chain also be improved significantly. The conductive agent is one of the key accessory material of lithium -ion battery, conductive carbon black is used traditionally. Following with the mass manufacture of carbon nanomateri als, the graphene-carbon nanotubes suspension of compound conductive slurry used as new generation conductive agent of lithium-ion battery, exhibits much better application performance of battery rate capability, battery charge/discharge rate and life, and was used in new-energy power battery from 2016, and the application scale has reached over 2000 ton per month in global market currently.
The graphene-carbon nanotube suspension is composed of graphene and carbon nanotubes as key materials, both one-dimensional carbon nanotubes and two-dimensional graphene nanosheets together can provide short-distance conductive contact and long-distance conductive network, the much higher application performance than carbon black is obtained. The industrial application proposes requirements of product specification and measurement methods of graphene-carbon nanotubes suspension, to come to an agreement between the supply and demand sides on KCCs and quantity values, and their measurement methods.
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