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A negative electrode material molybdenum-tin bimetallic sulfide for lithium ion/sodium ion battery and preparation method thereof

A technology of sodium ion battery and negative electrode material, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve problems such as limited improvement range, and achieve the effects of improving structural stability, short process flow, and high purity

Active Publication Date: 2022-04-22
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molybdenum disulfide and double carbon layer co-modified stannous sulfide nanospheres synthesized by this invention are used as the negative electrode material of sodium ion battery, although the discharge specific capacity and cycle life are improved to a certain extent, but the improvement range is still limited.

Method used

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  • A negative electrode material molybdenum-tin bimetallic sulfide for lithium ion/sodium ion battery and preparation method thereof
  • A negative electrode material molybdenum-tin bimetallic sulfide for lithium ion/sodium ion battery and preparation method thereof
  • A negative electrode material molybdenum-tin bimetallic sulfide for lithium ion/sodium ion battery and preparation method thereof

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Embodiment 1

[0031] A preparation method of a negative electrode material molybdenum-tin bimetallic sulfide for a lithium-ion / sodium-ion battery, comprising the following steps:

[0032] (1) Weigh 10 g of commercially purchased tin oxalate microrod precursors and calcinate them at 300 °C for 6 hours in an air atmosphere to obtain porous SnO rod-like structures. 2 Prebody;

[0033] (2) Weigh 1g of the rod-shaped SnO obtained in step (1) 2 Add the precursor to a beaker filled with 50ml of deionized water, and ultrasonically disperse it evenly;

[0034] (3) Take 1g of ammonium molybdate and add it to the suspension obtained in step (2), add 0.5g of dopamine hydrochloride after stirring, add 10ml of dehydrated alcohol after stirring, and continue to stir to obtain mixed solution A;

[0035] (4) Measure a certain amount of aqueous ammonia solution and add it to the mixed solution A obtained in step (3), adjust the pH value to be neutral, and continue stirring for 4 hours. After the stirring i...

Embodiment 2

[0040] A preparation method of a negative electrode material molybdenum-tin bimetallic sulfide for a lithium-ion / sodium-ion battery, comprising the following steps:

[0041] (1) Weigh 10 g of commercially purchased tin oxalate microrod precursors and calcinate them at 400 °C for 5 hours in an air atmosphere to obtain porous SnO rod-like structures. 2 Prebody;

[0042] (2) Weigh 1g of the rod-shaped SnO obtained in step (1) 2 Add the precursor to a beaker filled with 60ml of deionized water, and ultrasonically disperse it evenly;

[0043] (3) Take 1g of ammonium molybdate and add it to the suspension obtained in step (2), add 0.52g of dopamine hydrochloride after stirring, add 10ml of dehydrated alcohol after stirring, and continue to stir to obtain mixed solution A;

[0044] (4) Measure a certain amount of aqueous ammonia solution and add it to the mixed solution A obtained in step (3), adjust the pH value to be neutral, continue to stir for 5 hours, wait for the stirring to...

Embodiment 3

[0049] A preparation method of a negative electrode material molybdenum-tin bimetallic sulfide for a lithium-ion / sodium-ion battery, comprising the following steps:

[0050] (1) Weigh 10 g of commercially purchased tin oxalate microrod precursors and calcinate them at 450 °C for 4.5 hours in an air atmosphere to obtain porous SnO with a rod-like structure. 2 Prebody;

[0051] (2) Weigh 1g of the rod-shaped SnO obtained in step (1) 2 Add the precursor to a beaker filled with 80ml of deionized water, and ultrasonically disperse it evenly;

[0052] (3) Take by weighing 1g of sodium molybdate and add it to the suspension obtained in step (2), add 0.56g of dopamine hydrochloride after stirring, add 10ml of dehydrated alcohol after stirring, and continue to stir to obtain mixed solution A;

[0053] (4) Measure a certain amount of ammonia solution and add it to the mixed solution A obtained in step (3), adjust the pH value to be neutral, and continue stirring for 6 hours. After the...

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Abstract

The invention provides a negative electrode material molybdenum-tin bimetallic sulfide of a lithium-ion / sodium-ion battery and a preparation method thereof, belonging to the technical field of lithium batteries. The preparation method includes the following steps: using commercial tin oxalate microrods as a precursor, preparing tin dioxide microrods containing a porous structure through simple heat treatment; then adding a certain amount of ammonium molybdate, dopamine hydrochloride, ethanol and ammonia After the aqueous solution is stirred and reacted, the composite precursor is obtained by centrifugation and drying, and then the composite precursor is vulcanized under an inert atmosphere. After natural cooling, the rod-shaped structure SnS / MoS for lithium-ion / sodium-ion batteries can be obtained. 2 @C Composite. The negative electrode material prepared by the present invention is a molybdenum-tin bimetallic sulfide with a rod-like structure, and the outside is covered with a carbon layer, which further improves the specific capacity, cycle stability and cycle life of the negative electrode material.

Description

【Technical field】 [0001] The invention relates to the technical field of lithium batteries, in particular to molybdenum-tin bimetallic sulfide, a negative electrode material of a lithium-ion / sodium-ion battery, and a preparation method thereof. 【Background technique】 [0002] Lithium-ion batteries have achieved great commercial success and been widely used due to their advantages such as high energy density, long cycle life, and pollution-free. At present, commercial lithium-ion battery anode materials mainly include graphite, lithium titanate, and hard carbon. Although these materials have very good cycle performance, their low theoretical specific capacity has been difficult to meet people's demand for high-energy-density lithium-ion batteries. battery requirements. Therefore, it is particularly important to find new high-capacity anode materials. On the other hand, with the large-scale application of lithium-ion batteries, the lack of lithium resources and the increase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525H01M10/054B82Y30/00
CPCH01M4/366H01M4/5815H01M4/625H01M10/0525H01M10/054B82Y30/00H01M2004/027Y02E60/10
Inventor 潘齐常吴强胡思江黄有国王红强
Owner GUANGXI NORMAL UNIV