67results about How to "Rapid de-embedding" patented technology

The invention relates to the technical field of lithium ion batteries, and provides a lithium cobalt phosphate positive electrode material for a lithium ion battery and a preparation method thereof. According to the invention, doping is performed on the lithium cobalt phosphate by Fe3+; modified multi-walled carbon nanotubes are added during the preparation of precursor particles so that the carbon nanotubes partially coat the surfaces of the particles, and are partially embedded in the particles; then sintering is performed to obtain composite particles where the carbon nanometers are interpenetrated with the Fe3+ doped lithium cobalt phosphate; then polypyrrole is synthesized in situ on the surfaces of the composite particles; high temperature treatment is further performed to convert the polypyrrole into a nitrogen-doped carbon layer; and the carbon nanotubes on the surfaces of the lithium cobalt phosphate particles are connected together to form a dense conductive network, therebyobtaining a lithium cobalt phosphate positive electrode material. Compared with the conventional method, by use of the preparation method of the invention, the electronic conductivity and ionic conductivity of the lithium cobalt phosphate positive electrode material can be significantly improved; the decomposition of the electrolyte is inhibited; the specific capacity is increased; and the cycle performance is improved.