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Preparation method of cathode material for nanoporous metal sulfide rechargeable magnesium battery

A positive electrode material, magnesium battery technology, applied in battery electrodes, nanotechnology, non-aqueous electrolyte batteries, etc., can solve the problem of less positive electrode materials, and achieve good reversibility, small particles, and good electrochemical performance.

Active Publication Date: 2016-10-12
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the strong polarity of magnesium ions, the phenomenon of solvation is serious, and it is easy to form a dense passivation film in the electrolyte. At present, there are few positive electrode materials suitable for magnesium secondary batteries.

Method used

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  • Preparation method of cathode material for nanoporous metal sulfide rechargeable magnesium battery
  • Preparation method of cathode material for nanoporous metal sulfide rechargeable magnesium battery
  • Preparation method of cathode material for nanoporous metal sulfide rechargeable magnesium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: the preparation of compound CoS

[0035] 1. Weigh 60mL of deionized water and 15mL of ethylene glycol with a graduated cylinder, and mix them evenly as the reaction solvent.

[0036] 2. With cobalt chloride (CoCl 2 ·6H 2 O), cysteine ​​(C 3 h 7 NO 2 S) as a raw material, weighed according to the atomic molar ratio of Co:S=1:3, dissolved in a mixed solvent, stirred vigorously by a magnetic stirrer, and then moved the mixed solution to a stainless steel reaction kettle with a polytetrafluoroethylene liner , the solution was pink.

[0037]3. Transfer the sealed reaction kettle to an oven, slowly raise the temperature to 200°C, keep it warm for 20 hours, and then cool it with the furnace.

[0038] 4. Wash and filter the reacted solution (including black precipitate) with deionized water and ethanol continuously to remove organic and inorganic ions coated on the surface of the product. The product was dried in a vacuum oven at a temperature of 60° C. for...

Embodiment 2

[0041] Embodiment 2: compound Ni 0.5 CoS 2 Preparation of:

[0042] 1. Nickel sulfate (Ni(SO 4 ) 2 ·6H 2 O), cobalt chloride (CoCl 2 ·6H 2 O) and thiourea (CH 4 N 2 S) as the raw material, according to the ratio of atomic molar ratio Ni:Co:S=1:2:12, weigh the raw materials respectively, dissolve them in water, and stir them evenly with a magnetic stirrer, then move the mixed solution to a tank with polytetrafluoroethylene Lined stainless steel reaction vessel.

[0043] 2. Transfer the above reaction kettle to an oven, heat up to 180°C, keep it warm for 15 hours, and then cool with the oven.

[0044] 3. Wash and filter the reacted solution (including black precipitate) with deionized water and ethanol continuously to remove organic and inorganic ions coated on the surface of the product. The product was dried in a vacuum oven at a temperature of 60° C. for 10 h to prepare electrode sheets and perform electrochemical tests.

[0045] This example obtained Ni 0.5 CoS ...

Embodiment 3

[0046] Embodiment 3: compound Fe 0.1 Preparation of CoS:

[0047] 1. With ferrous sulfate (Fe(SO 4 ) 2 ·6H 2 O), cobalt sulfate (CoSO 4 ·7H 2 O) and thioacetamide (C 2 h 5 NS) as the raw material, weigh the raw materials according to the ratio of atomic molar ratio Fe:Co:S=1:8:18, dissolve them in ethylene glycol, and stir them evenly with a magnetic stirrer, then move the mixed solution to a poly PTFE-lined stainless steel reactor.

[0048] 2. Transfer the above reaction kettle to an oven, raise the temperature to 160°C, keep it warm for 20 hours, and then cool it with the oven.

[0049] 3. Wash and filter the reacted solution (including black precipitate) with deionized water and ethanol continuously to remove organic and inorganic ions coated on the surface of the product. The product was dried in a vacuum oven at a temperature of 60° C. for 10 h to prepare electrode sheets and perform electrochemical tests.

[0050] This example obtained Fe 0.1 In the CoS phase,...

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Abstract

The invention discloses a preparation method of a cathode material of a nano porous metal sulfide rechargeable magnesium battery, Which is characterized by comprising the following steps: respectively dissolving metal salt and a sulfur source compound in a solvent, then uniformly mixing, transferring the mixing solution in a reaction vessel, transferring the reaction vessel in a baking oven, heating to the temperature of 140-200 DEG C, insulating for 15-24 hours, cooling in furnace, washing the reaction products by using deionized water and absolute ethyl alcohol for several times, and finally drying to obtain the above cathode material. The cathode material uses a chemical formula of MyCoS1+x to express, M is one of transition metal elements, wherein the x and y have the value range that the x is greater than 0 and less than or equal to 1, and y is greater than or equal to 0 and less than or equal to 1. The cathode material has good crystallinity and structured morphology, and is capable of realizing the reversible embedding / extrusion behavior of magnesium ion. The preparation method of the cathode material of the nano porous metal sulfide rechargeable magnesium battery has the advantages of excellent electrochemistry performance, simple preparation technology, abundant raw material source and low price, and has wide application prospect.

Description

technical field [0001] The invention relates to a battery cathode material, in particular to a preparation method of a nanoporous metal sulfide cathode material, and belongs to the field of rechargeable magnesium batteries. Background technique [0002] In recent decades, with people's vigorous exploitation of non-renewable resources, coal, oil and other energy sources are increasingly depleted, while environmental pollution has become an urgent problem to be solved. People's demand for energy is still growing, and the challenges of environmental problems are still intensifying. Therefore, there is an urgent need to develop high-performance, low-cost green chemical power sources for the rapid development of electronic equipment and electric vehicle projects. Currently, commercially widely used rechargeable power sources include lead-acid batteries, nickel metal hydride batteries and lithium secondary batteries. Lithium batteries are currently the most popular chemical power...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58
CPCB82Y40/00H01M4/5815H01M10/05Y02E60/10
Inventor 吴晓梅吴丹妮张赟张若然曾小勤丁文江
Owner SHANGHAI JIAOTONG UNIV