A doped lithium battery cathode material

Abstract

The invention discloses a doping type lithium battery anode material. The doping type lithium battery anode material contains the following components in percentage by weight: 92wt%-96wt% of a ternary material and 4wt%-8wt% of a doping material, wherein the doping material is a mixture of at least two of ferrous sulfide, manganese sulfide and titanium disulfide. The doping type lithium battery anode material is high in monomer energy density, the electrode polarization phenomenon after a lithium battery is repeatedly charged at a high temperature is relatively high, and the working time and service life of the lithium battery at high temperature can be effectively prolonged.

Description

technical field

[0001] The invention relates to the field of lithium batteries, in particular to a doped lithium battery cathode material. Background technique

[0002] Ternary polymer lithium battery refers to the use of nickel-cobalt lithium manganese oxide (Li(NiCoMn)O 2 ) The lithium battery of the ternary positive electrode material, the precursor product of the ternary composite positive electrode material, is based on nickel salt, cobalt salt, and manganese salt as raw materials. Compared with lithium cobalt oxide batteries, batteries made of ternary materials are safer than lithium cobalt oxide batteries, but the voltage is too low. When used in mobile phones (the cut-off voltage of mobile phones is generally around 3.4V), there will be an obvious feeling of insufficient capacity. Moreover, the single energy density of the current ternary lithium battery is 180Wh, and it is 110Wh after grouping, and after repeated high-temperature charging and discharging for many t...

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