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Preparation method for improving potential of lithium ion battery positive electrode material LiCoO2

A technology for lithium-ion batteries and cathode materials, applied in battery electrodes, secondary batteries, circuits, etc., to achieve the effects of superior electrochemical comprehensive performance, superior cycle performance, and smooth surface

Inactive Publication Date: 2017-01-04
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

Therefore, it is necessary to find new materials exceeding 200mAh / g, or to increase the potential of the positive electrode material to lithium to a higher potential to increase the energy density. At present, the lithium ion positive electrode material lithium cobaltate has a potential of only about 4.0v to lithium, and the working voltage Only between 3.0~4.2v, the specific energy of the full battery is only 140~145mAh / g, even if it is increased by 0.1v, the energy density will increase by 10%. Therefore, in view of the above problems, a preparation method for improving the potential of LiCoO2, a cathode material for lithium-ion batteries, is proposed. method

Method used

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  • Preparation method for improving potential of lithium ion battery positive electrode material LiCoO2

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Embodiment 1

[0021] A preparation method for improving the potential of lithium-ion battery cathode material LiCoO2 is completed according to the following steps:

[0022] 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.

[0023] 2. Put the homogeneously mixed material obtained in step 1 into a refractory sagger, push it into a high-temperature pusher kiln, keep it w...

Embodiment 2

[0029] A preparation method for improving the potential of lithium-ion battery cathode material LiCoO2 is completed according to the following steps:

[0030] 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 1.05:1. 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, CeO 2 The added weight is 0.15% of the weight of tricobalt tetroxide, Nb 2 o 5 The added weight is 0.1% of the weight of tricobalt tetroxide. The battery grade lithium carbonate, GB-100 type cobalt tetroxide and TiO 2 , CeO 2 and Nb 2 o 5 Perform doping and mixing, and mix well.

[0031] 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 ...

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Abstract

The invention discloses a preparation method for improving the potential of a lithium ion battery positive electrode material LiCoO2. The method comprises the following steps: mixing cobaltosic oxide with a lithium salt, adding an additive T1, preprocessing above mixed materials, carrying out high-temperature primary sintering on the above obtained preprocessed uniformly-mixed materials, carrying out surface treatment on the obtained sintered material, carrying out secondary mixing after the treatment ends, preprocessing the secondary mixed material, carrying out low-temperature secondary sintering, and carrying out surface treatment to obtain a product. Lithium cobaltate produced through the preparation method for improving the potential of the lithium ion battery positive electrode material has original properties, and also realize 4.4 v charge and discharge; the material is processed to form a final battery undergoing test, the test current rate is 0.2 C, the discharge voltage range is 3.0-4.35 V, the specific capacity of the tested material is greater than 160 mAh / g, and the capacity retention ratio is 99.5% or above after cycling 1 C charge / 1 C discharge 10 times; and the preparation method has good economic and social benefits, and is suitable for being promoted and used.

Description

technical field [0001] The invention relates to a preparation method for increasing the potential of LiCoO2, a cathode material of a lithium ion battery, and 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 products need lithium-ion batteries for power supply. China's fast-growing economy has an increasing demand for new battery materials, and mobile phones, notebook computers, digital cameras, video cameras, automobiles and other products require new, high-efficiency , The strong demand for environmentally friendly battery materials, China's new battery material market will continue to expand. Lithium battery is the future development direction of batteries, and the development prospect of its positive electrode materials is promising. At the same time, the ...

Claims

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Application Information

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IPC IPC(8): H01M4/485H01M4/62
CPCH01M4/485H01M4/62H01M10/0525Y02E60/10
Inventor 黄兵
Owner TIANJIN GUOAN MGL NEW MATERIALS TECH CO LTD
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