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a li 3 cr(moo 4 ) 3 Application in lithium ion battery positive electrode

A lithium-ion battery, cathode technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor cycle stability, limited practical application of materials, low specific capacity and operating voltage, and achieve the effect of high specific capacity

Active Publication Date: 2020-02-21
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many problems in these materials: low specific capacity and working voltage, poor cycle stability and difficult preparation, etc., which severely limit the practical application of these materials.

Method used

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  • a li <sub>3</sub> cr(moo <sub>4</sub> ) <sub>3</sub> Application in lithium ion battery positive electrode
  • a li <sub>3</sub> cr(moo <sub>4</sub> ) <sub>3</sub> Application in lithium ion battery positive electrode
  • a li <sub>3</sub> cr(moo <sub>4</sub> ) <sub>3</sub> Application in lithium ion battery positive electrode

Examples

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Effect test

Embodiment 1

[0034] Example 1 Li 3 Cr(MoO 4 ) 3 High-temperature solid-phase preparation of cathode materials

[0035] 0.03mol of Li 2 CO 3 , 0.01mol of Cr 2 o 3 and 0.06mol of MoO 3 Put it in an agate mortar and grind for half an hour. Transfer to a crucible and place the crucible in the muffle furnace. The furnace was raised to 300°C at a heating rate of 5°C / min, kept for 5 hours, and finally cooled to room temperature at a rate of 20°C / min. The synthesized material is taken out, ground into powder and transferred again to a crucible and placed in a muffle furnace. The furnace was raised to 800°C at a heating rate of 5°C / min, kept for 20 hours, and finally lowered to room temperature at a rate of 20°C / min. The obtained product is taken out of the grinding component to obtain Li 3 Cr(MoO 4 ) 3 compound.

[0036] Such as figure 1 As shown, it is a gray-green powder with a tap density of 2.0g / cm 3 , melting point 840°C. Its X-ray diffraction pattern is as figure 2 As show...

Embodiment 2

[0037] Example 2 Li 3 Cr(MoO 4 ) 3 Sol-gel Preparation of Cathode Materials

[0038] Dissolve 0.03mol of oxalic acid in a beaker filled with 150ml of deionized water, then add 0.01mol of Cr(NO 3 ) 3 , Stir in a constant temperature water bath at 70-80°C until it turns into a blue solution, then add 0.03mol of MoO 3 , 0.015mol of Li 2 CO 3 , continue stirring to form a blue-green sodium vanadium borate sol. Place the sol in an oven at 80°C and bake for about 10 hours to obtain a blue fluffy precursor. Grind the precursor into powder and place it in a crucible, and put the crucible in a muffle furnace. The furnace was raised to 300°C at a heating rate of 5°C / min, kept for 5 hours, and finally cooled to room temperature at a rate of 20°C / min. The synthesized material is taken out, ground into powder and transferred again to a crucible and placed in a muffle furnace. The furnace was raised to 800°C at a heating rate of 5°C / min, kept for 20 hours, and finally cooled to roo...

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Abstract

The present invention relates to a kind of Li 3 Cr(MoO 4 ) 3 Application in lithium-ion battery cathode. The Li 3 Cr(MoO 4 ) 3 The compound is used as an active material in the positive electrode of the lithium ion battery, has good charging and discharging performance of the lithium ion battery, good cycle stability, and suitable working voltage, and can be used as the positive electrode material of the lithium ion battery.

Description

technical field [0001] The present invention relates to chemical formula is Li 3 Cr(MoO 4 ) 3 Lithium-ion battery cathode material, preparation method and use of the material to make lithium-ion batteries. Background technique [0002] With the increasingly severe energy problems, the increasing scarcity of non-renewable resources, and the increasing awareness of the importance of environmental protection, society's demand for new energy is increasing, and energy storage is playing an increasingly important role in the energy system. Previously, lithium-ion batteries, as an important energy storage device in new energy sources, attracted many research resources. [0003] The cathode materials currently used in lithium-ion batteries are mainly LiFePO 4 、LiCoO 2 and LiMn 2 o 4 Wait. However, there are still many problems in these materials: low specific capacity and working voltage, poor cycle stability and difficult preparation, etc., which severely limit the practica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M10/0525C01G39/00
CPCY02E60/10
Inventor 冯凯张华民张洪章李先锋程意
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI