Co(vo3)2-mn(vo3)2 with different shapes and its preparation method and application

A morphology and solution technology, applied in the direction of structural parts, electrical components, battery electrodes, etc., can solve the problem of not preparing a pencil-like structure

Active Publication Date: 2019-05-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are very few research reports on related aspects, but none of them have prepared a pencil-like structure Co(VO 3 ) 2 -Mn(VO 3 ) 2

Method used

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  • Co(vo3)2-mn(vo3)2 with different shapes and its preparation method and application
  • Co(vo3)2-mn(vo3)2 with different shapes and its preparation method and application
  • Co(vo3)2-mn(vo3)2 with different shapes and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1 solid unidirectional pencil point Co (VO 3 ) 2 -Mn(VO 3 ) 2 preparation of

[0062] Solid unidirectional pencil head structure Co(VO 3 ) 2 -Mn(VO 3 ) 2 The material preparation method comprises the following steps:

[0063] (1) NH 4 VO 3 Add deionized water at 70-90°C, and continue to stir for 5-10 minutes, the solution turns light yellow-green;

[0064] (2) Add CO(NH 2 ) 2 Mix with NaOH, LiOH, KOH one of the strong bases, and keep stirring until it is completely dissolved. When the above mixture is added, the concentration of the mixture in the solution is 0.05-0.08molL -1 , where CO(NH 2 ) 2 The molar number is the same as that of the above-mentioned strong base;

[0065] (3) Add the cobalt salt to the above solution, and keep stirring until the solution turns transparent reddish brown, wherein the Co:V molar ratio ranges from 1:3 to 1:5; preferably, the cobalt salt is CoCl 2 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 O, Co(Ac) 2 4H 2 O etc.;

[00...

Embodiment 2

[0075] Embodiment 2 solid two-way pencil head Co (VO 3 ) 2 -Mn(VO 3 ) 2 preparation of

[0076] Solid two-way pencil head structure Co(VO 3 ) 2 -Mn(VO 3 ) 2 The material preparation method comprises the following steps:

[0077] (1) NH 4 VO 3 Add deionized water at 70-90°C, and continue to stir for 5-10 minutes, the solution turns light yellow-green;

[0078] (2) Add one of NaOH, LiOH, and KOH to the solution, and continue to stir until it is completely dissolved. The concentration of one of the strong bases of NaOH, LiOH, and KOH in the solution is 0.02-0.05molL -1 ;

[0079] (3) Add the cobalt salt to the above solution, and keep stirring until the solution turns transparent reddish brown, wherein the Co:V molar ratio ranges from 1:3 to 1:5; preferably, the cobalt salt is CoCl 2 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 O, Co(Ac) 2 4H 2 O etc.;

[0080] (4) Add MnCl to the above solution 2 ·5H 2 O, keep stirring until completely dissolved, wherein the molar ratio of Mn...

Embodiment 3

[0089] Embodiment 3 Hollow two-way pencil point Co (VO 3 ) 2 -Mn(VO 3 ) 2 preparation of

[0090] Hollow two-way pencil head structure Co(VO 3 ) 2 -Mn(VO 3 ) 2 The material preparation method comprises the following steps:

[0091] (1) NH 4 VO 3 Add deionized water at 70-90°C, and continue stirring for 5-10 minutes, the solution turns light yellow-green;

[0092] (2) Add one of the strong bases NaOH, LiOH, KOH to the solution, and continue to stir until it is completely dissolved. The concentration of one of the strong bases added in NaOH, LiOH, and KOH in the solution is 0.05-0.08 moL -1 ;

[0093] (3) Add the cobalt salt to the above solution, and keep stirring until the solution turns transparent reddish brown, wherein the Co:V molar ratio ranges from 1:3 to 1:5; preferably, the cobalt salt is CoCl 2 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 O, Co(Ac) 2 4H 2 O etc.;

[0094] (4) Add MnCl to the above solution 2 ·5H 2 O, keep stirring until completely dissolved, where...

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Abstract

The present invention provides a different morphology Co(VO 3 ) 2 -Mn(VO 3 ) 2 Its preparation method and the purposes as lithium-ion battery negative electrode material, only need to change alkaline additive, control the molar ratio of Co-Mn just can obtain the lithium battery negative electrode material of different appearance novel regularity, performance all better, Co(VO) synthesized by this scheme 3 ) 2 -Mn(VO 3 ) 2 Due to its unique crystal structure and large tap density, it is a very ideal negative electrode material. It has a great application prospect in lithium-ion batteries, expands the range of negative electrode materials, and has a large charge when used as a lithium battery negative electrode material. The discharge specific capacity and stable cycle performance can significantly improve the storage capacity of electrons and ions, with relatively cycle stability and good rate performance; for regular powder products, it has a very stable crystal structure and relatively stable structure.

Description

technical field [0001] The invention belongs to the technical field of preparation of lithium battery materials, in particular to a method for preparing Co(VO) with different shapes. 3 ) 2 -Mn(VO 3 ) 2 method and the Co 3 V 2 o 8 And its use as lithium ion battery negative electrode material. Background technique [0002] Due to the advantages of high voltage, high specific energy, wide operating temperature range, high specific power, and stable discharge, lithium batteries are widely used in various electronic products or devices. However, as the market requirements become higher and higher, it is necessary to find new Electrode materials to meet the growing demand for energy storage. The negative electrode material is the key factor to determine the lithium battery, so the development of negative electrode material becomes the key to improve the performance of lithium battery. At present, there are very few research reports on related aspects, but none of them hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/505
CPCH01M4/362H01M4/48H01M4/505Y02E60/10
Inventor 吴孟强杨俭陈诚文浪冯婷婷
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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