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Preparation method for improving electrical property of positive electrode material LiCoO2

A cathode material and electrical performance technology, applied in circuits, electrical components, battery electrodes, etc., can solve the problems of high rate charge and discharge, low capacity, poor electrical conductivity, etc., and achieve excellent electrochemical performance, high capacity, and processing. Excellent performance

Inactive Publication Date: 2017-02-22
TIANJIN GUOAN MGL NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, with the high progress of aerospace technology and military technology, electronic information equipment is increasingly becoming lightweight, miniaturized and portable. For some high-current discharge fields (that is, high-rate discharge), the current lithium-ion battery preparation exists. There are many shortcomings, such as poor electrical conductivity, low capacity, and inability to achieve high-rate charge and discharge of currently commercially available products. Therefore, a preparation method for improving the electrical properties of the positive electrode material LiCoO2 is proposed to address the above problems.

Method used

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  • Preparation method for improving electrical property of positive electrode material LiCoO2
  • Preparation method for improving electrical property of positive electrode material LiCoO2
  • Preparation method for improving electrical property of positive electrode material LiCoO2

Examples

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Effect test

Embodiment 1

[0022] An improved cathode material LiCoO 2 The preparation method of electrical properties is completed according to the following steps:

[0023] 1. Select battery-grade lithium carbonate from Sichuan Tianqi Lithium Industry Co., Ltd. and GB-100 model cobalt tetroxide from Ningbo Kebot Cobalt and Nickel Co., Ltd. as raw materials, and make a ratio according to the molar ratio of lithium to cobalt 1.035:1. Add TiO 2 , ZrO 2 and Nb 2 o 5 As additive T1, where TiO 2 The added weight is 0.12% of the weight of tricobalt tetroxide, ZrO 2 The added weight is 0.1% of the weight of tricobalt tetroxide, Nb 2 o 5 The added weight of is 0.15% of the weight of tricobalt tetroxide. The battery grade lithium carbonate, GB-100 type cobalt tetroxide and TiO 2 , ZrO 2 and Nb 2 o 5 Perform doping and mixing, and mix well.

[0024] 2. Put the homogeneously mixed material obtained in step 1 into a refractory sagger, push it into a high-temperature pusher kiln, and keep it at a te...

Embodiment 2

[0030] An improved cathode material LiCoO 2 The preparation method of electrical properties is completed according to the following steps:

[0031] 1. Select battery-grade lithium carbonate from Sichuan Tianqi Lithium Industry Co., Ltd. and GB-100 model cobalt tetroxide from Ningbo Kebot Cobalt and Nickel Co., Ltd. as raw materials, and make the ratio according to the molar ratio of lithium to cobalt 1.045:1. Add TiO 2 , CeO 2 and Nb 2 o 5 As additive T1, where TiO 2 The added weight is 0.12% of the weight of tricobalt tetroxide, ZrO 2 The added weight is 0.1% of the weight of tricobalt tetroxide, Nb 2 o 5 The added weight of is 0.15% of the weight of tricobalt tetroxide. The battery grade lithium carbonate, GB-100 type cobalt tetroxide and TiO 2 , ZrO 2 and Nb 2 o 5 Perform doping and mixing, and mix well.

[0032] 2. Put the homogeneously mixed material obtained in step 1 into a refractory sagger, push it into a high-temperature pusher kiln, keep it warm for ...

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Abstract

The invention discloses a preparation method for improving electrical property of a positive electrode material LiCoO2. The preparation method is completed according to the following steps of mixing Co3O4 and a lithium salt (adding an additive T1), performing pre-processing, performing first sintering for 6-20 hours under a temperature of 600-1,100 DEG C, performing surface processing, performing secondary mixing, performing pre-processing, performing second sintering for 5-10 hours in an inert atmosphere at 400-800 DEG C, performing surface processing and obtaining a product. The modified LiCo produced according to the method has original property, and high-rate and large-current charge / discharge also can be achieved; and through test on a battery prepared by taking a lithium piece as a negative electrode material, the test current rate is 0.2C, the voltage range is 2.9-4.2V, the specific capacity of the test material is larger than 160mAh / g, the discharge platform retention rate is over 85% after circulation of 100 times, the capacity retention ratio is over 95%, the preparation method has favorable economic benefit and social benefit and is suitable for promotion and application.

Description

technical field [0001] The invention relates to a preparation method for improving the electrical performance of positive electrode material LiCoO2, which belongs to the technical field of new energy and high efficiency and energy saving-new high-efficiency energy conversion and storage technology and related product preparation. Background technique [0002] With the development of science and technology, more and more electronic products or products that require electricity have more and more demands on lithium batteries. Lithium cobalt oxide is the positive electrode material of lithium-ion batteries and a key component of lithium-ion batteries, accounting for about About one-third of the cost of ion battery cell materials, it is currently the most mature production process, the most reliable battery performance and the most widely used lithium-ion battery cathode material. Lithium cobaltate, as the mainstream positive electrode material of lithium-ion batteries, is widel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M10/0525
CPCH01M4/485H01M10/0525Y02E60/10
Inventor 黄兵
Owner TIANJIN GUOAN MGL NEW MATERIALS TECH CO LTD
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