Synthesis and performance research of carboxyl substituted nickel phthalocyanine as cathode materials for lithium ion batteries

Pure carboxyl substituted nickel phthalocyanine complexe （Ni-Pc） was obtained using the "solid phase" template synthesis method and special process of separation and purification. Then the Ni-Pc active material was mixed with iodine and ball milled to obtain the Ni-Pc nanoparticles. The electrochemical performance of the nanoparticles was investigated using lithium plate as counter electrode. The initial discharge capacity of Ni-Pc nanoparticles is 852 mA.h/g in cutoff voltage of 0.3～3.2 V. After 10 cycles，the specific capacity decreased rapidly and reached a stable value. Then the discharge capacity remains at 284 mA.h/g af