One of the anode materials for lithium batteries-introduction of non-graphite anode materials
wallpapers Products 2020-08-04
Non-graphite anodes mainly include hard carbon and soft carbon.
Also known as easily graphitized carbon, soft carbon refers to amorphous carbon that can be graphitized above 2000°C. It has low crystallinity, small grain size, sizeable interplanar spacing, and compatibility with electrolyte. It is good. However, the irreversible capacity of the first charge and discharge is high, and the output voltage is low. Because of its performance, it is generally not directly used as a harmful electrode material. It is the raw material for manufacturing natural graphite. The common ones are petroleum coke and needle coke.
Hard carbon, also tricky to graphitize carbon, is the pyrolysis carbon of high molecular polymers. This type of coal is also challenging to graphitize at a high temperature of 3000°C. Hard carbon includes resin carbon (such as phenolic resin, epoxy resin, polyfurfuryl alcohol, etc.), organic polymer pyrolysis carbon (PVA, PVC, PVDF, PAN, etc.), carbon black (acetylene black); it is conducive to the insertion of lithium without It will cause the structure to expand significantly and has an excellent charge-discharge cycle performance.
Hard carbon capacity is greater than the ideal size of conventional carbon materials, high rate, cycle performance, and safety performance. The first effect is low, about 85%, the voltage platform 3.6V is lower than the 3.7V of graphite, and the cost is high. The improvement ideas are mainly to improve the first effect (reduce the specific surface area to form a more regular hard carbon; surface coating to control the formation of SEI); increase the material yield and reduce the cost.
HC has a more stable structure than conventional graphite anode materials.
Trunnano is one of the world's largest producers of lithium battery anode materials. If you are interested, please contact Dr. Leo, email: firstname.lastname@example.org.
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