The invention relates to a fast-charging
lithium ion battery, a
cathode material thereof and a preparation method of the
cathode material. The preparation method includes: using a
metal oxide MxNyOz (M, N=Zn, Cu, Fe, Mn, Ge, Co, Ni, Ti, V, Cr, Cd, Sn and the like, and 0< / =x< / =3, 0< / =y< / =3, and 1< / =x< / =5) nano rod as the template, allowing the nano rod to have in-situ
polymerization with
organic matter containing
nitrogen, carbonizing to obtain a precursor, adding the precursor into a stripper plate
reagent, and
processing to obtain the
nitrogen-doped mesoporous hollow rod-shaped carbon nanocapsule
cathode material. Compared with a
lithium ion battery using carbon materials, the fast-charging
lithium ion battery has the advantages that under continuous
high current density, super-
fast charging and discharging can be achieved, and the fast-charging
lithium ion battery is high in capacity and long in cycle life; when the charging and discharging are performed under the
current density of 10A / g, the capacity is stably kept at 370mAh / g after the cycle of 10,000 circles; when the charging and discharging are performed under the super-large
current density of 30A / g, the capacity is stably kept at 290mAh / g after the cycle of 10,000 circles, and good cycle stability and high capacity are achieved. The preparation method is simple, does not need complex equipment, capable of achieving large-batch preparation, and suitable for industrial production.