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A doped lithium battery cathode material

A technology of positive electrode materials and doped materials, which is applied to battery electrodes, circuits, electrical components, etc., can solve problems such as insufficient capacity, decreased battery discharge capacity, and low voltage, and achieve the effect of improving working time and service life

Active Publication Date: 2019-07-16
ZHEJIANG MEIDU HITRANS LITHIUM BATTERY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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 obvious feeling of insufficient capacity.
Moreover, the single energy density of the current ternary lithium battery is 180Wh, and it is 110Wh after being grouped, and after repeated high-temperature charging and discharging for many times (more than 300 times), the electrode polarization is more serious, and the battery discharge capacity drops sharply.

Method used

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  • A doped lithium battery cathode material
  • A doped lithium battery cathode material

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Embodiment 1

[0015] The anode material of the doped lithium battery of the present invention is composed of the following components: 92wt% ternary material and 8wt% doping material.

[0016] In the ternary material: the weight ratio of lithium nickelate, lithium manganate and lithium cobaltate is 1:0.5:0.5.

[0017] The doping material is a mixture of ferrous sulfide and manganese sulfide, wherein the weight ratio of the ferrous sulfide to the manganese sulfide is 1:4.

Embodiment 2

[0019] The positive electrode material of the doped lithium battery of the present invention is composed of the following components: 93wt% ternary material and 7wt% doping material.

[0020] In the ternary material: the weight ratio of lithium nickelate, lithium manganate and lithium cobaltate is 1:0.75:0.75.

[0021] The doping material is a mixture of ferrous sulfide and manganese sulfide, wherein the weight ratio of the ferrous sulfide to the manganese sulfide is 1:1.

Embodiment 3

[0023] The anode material of the doped lithium battery of the present invention is composed of the following components: 94wt% ternary material and 6wt% doping material.

[0024] In the ternary material: the weight ratio of lithium nickelate, lithium manganate and lithium cobaltate is 1:0.6:0.9.

[0025] The doping material is a mixture of ferrous sulfide and manganese sulfide, wherein the weight ratio of the ferrous sulfide to the manganese sulfide is 4:1.

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/505H01M4/525
CPCH01M4/505H01M4/525H01M4/5815Y02E60/10
Inventor 毛秦钟钱志挺吉同棕吴海军王寅峰
Owner ZHEJIANG MEIDU HITRANS LITHIUM BATTERY TECHNOLOGY CO LTD
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