Application of K2Mn2 (MoO4) 3 in negative electrode of lithium ion battery

A lithium-ion battery and negative electrode technology, which is applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve problems such as poor cycle stability, limit the practical application of materials, and make preparations difficult, and achieve high specific capacity.

Active Publication Date: 2021-07-13
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Application of K2Mn2 (MoO4) 3 in negative electrode of lithium ion battery
  • Application of K2Mn2 (MoO4) 3 in negative electrode of lithium ion battery
  • Application of K2Mn2 (MoO4) 3 in negative electrode of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1K 2 mn 2 (MoO 4 ) 3 High-temperature solid-phase preparation of negative electrode materials

[0038] 0.01mol of K 2 CO 3, 0.02mol of MnO and 0.03mol 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 cooled to room temperature at a rate of 20°C / min. The obtained product is taken out of the grinding component to obtain K 2 mn 2 (MoO 4 ) 3 compound.

[0039] 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 A...

Embodiment 2

[0040] Example 2K 2 mn 2 (MoO 4 ) 3 Sol-gel Preparation of Anode Materials

[0041] Dissolve 0.03mol of oxalic acid in a beaker filled with 100ml of deionized water, then add 0.02mol of Mn(NO 3 ) 2 , Stir in a constant temperature water bath at 70-80°C until it turns into a green solution, then add 0.03mol of MoO 3 , 0.01mol of K 2 CO 3 , continue stirring to form a sol. Place the sol in an oven at 80°C and bake for about 10 hours to obtain a green 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 room temperature at a rate of 20°C / mi...

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Abstract

The invention relates to an application of K2Mn2 (MoO4) 3 in a negative electrode of a lithium ion battery. The K2Mn2 (MoO4) 3 compound is applied to a lithium ion battery negative electrode as an active material, has relatively good lithium ion battery charge-discharge performance, good cycle stability and proper working voltage, and can be used as a lithium ion battery negative electrode material.

Description

technical field [0001] The present invention relates to chemical formula K 2 mn 2 (MoO 4 ) 3 Lithium-ion battery negative electrode 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] At present, the negative electrode materials used in lithium-ion batteries mainly include graphite, carbon and lithium titanate. However, there are still many problems in these materials: poor specific capacity, poor cycle stability and preparation difficulties, etc., which severely limit the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/00H01M4/58H01M10/0525
CPCC01G39/006H01M4/5825H01M10/0525C01P2006/11C01P2002/70C01P2004/03C01P2006/40H01M2004/027Y02E60/10
Inventor 冯凯葛秀丽刘珊珊王福香杨昕
Owner YANTAI UNIV
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