High performance lithium ionic cell cathode material and method for producing the same
A technology for lithium-ion batteries and negative electrode materials, applied in electrode manufacturing, battery electrodes, circuits, etc., can solve uneven coating, low tap density, affecting cycle efficiency of resin-coated graphite materials, and cycle stability Graphite electrode compression To improve the overall electrical performance and improve the uniformity
Inactive Publication Date: 2008-04-16
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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The present invention belongs to a high-performance lithium-ion battery cathode material and a method for preparing the same; solvent, resin and asphalt are added to a container and graphite grains are then added by stirring; the solvent is steamed out through heating up and decompression to form the graphite coated with resin and asphalt which is then put to an inert atmosphere charring furnace for heat treatment; the graphite is cooled to the cycle process less than 100 DEG C after 1 hour to 10 hours; material is taken out, smashed and sieved to grains with grain diameter less than 5 um; after the accumulated volume fraction of grains is less than 10 percent, the high-performance lithium-ion battery cathode material is achieved. As the graphite grains are covered with mixed high molecular polymer made of resin and asphalt, not only the advantages of the resin and asphalt are used, but also the resin has the characteristics of solving asphalt and having condensation polymerization with asphalt, thereby the uniformity, operability and electrical property of covering the graphite grains are improved. By adjusting the proportion of asphalt to resin and controlling the specific surface area of covering graphite grains, the invention has different cycle stability and multiplying power property.
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