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Rechargeable magnesium battery positive electrode material with nano porous metal sulfide and application method thereof

A metal sulfide and nanoporous technology, applied in battery electrodes, chemical instruments and methods, nickel sulfide, etc., can solve the problem of less positive electrode materials and achieve good reversibility, small particles, and good electrochemical performance.

Active Publication Date: 2014-06-18
SHANGHAI JIAO TONG 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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  • Rechargeable magnesium battery positive electrode material with nano porous metal sulfide and application method thereof
  • Rechargeable magnesium battery positive electrode material with nano porous metal sulfide and application method thereof
  • Rechargeable magnesium battery positive electrode material with nano porous metal sulfide and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Preparation and Application of Compound CoS

[0037] 1. Weigh 60 mL of deionized water and 15 mL of ethylene glycol into a measuring cylinder, mix well and use it as a reaction solvent.

[0038] 2, with cobalt chloride (CoCl 2 ·6H 2 O), cysteine ​​(C 3 H 7 NO 2 S) as the raw material, weighed according to the atomic molar ratio of Co:S=1:3, dissolved in a mixed solvent, and stirred evenly with a magnetic stirrer, then the mixed solution was moved to a stainless steel reaction kettle with a PTFE lining , the solution is pink.

[0039] 3. Transfer the sealed reaction kettle to the oven, slowly heat up to 200°C, keep the temperature for 20h and then cool down with the oven.

[0040] 4. The reacted solution (including the black precipitate) was continuously washed and filtered by deionized water and ethanol to remove the organic matter and inorganic ions coated on the surface of the product. The product was put into a vacuum oven and dried at a temperature...

Embodiment 2

[0045] Example 2: Compound Ni 0.5 CoS 2 preparation and application of

[0046] 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 atomic molar ratio Ni:C o :S=1:2:12 The ratios of raw materials were weighed, dissolved in water, and the mixed solution was moved to a stainless steel reaction kettle with a teflon lining after strong stirring by a magnetic stirrer.

[0047] 2. Transfer the above reaction kettle to an oven, heat up to 180°C, keep the temperature for 15h and then cool down with the oven.

[0048] 3. The reacted solution (including the black precipitate) was continuously washed and filtered by deionized water and ethanol to remove the organic matter and inorganic ions coated on the surface of the product. The product was put into a vacuum oven and dried at a temperature of 60 °C for 10 h to prepare electrode sheets and conduct electrochemical tests.

[0049] The applic...

Embodiment 3

[0050] Example 3: Compound Fe 0.1 Preparation and application of CoS

[0051] 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 atomic molar ratio Fe:Co:S=1:8:18, dissolve them in ethylene glycol, and stir them evenly with a magnetic stirrer. Teflon-lined stainless steel reactor.

[0052] 2. Transfer the above reaction kettle to an oven, heat up to 160°C, keep the temperature for 20h and then cool down with the oven.

[0053] 3. The reacted solution (including the black precipitate) was continuously washed and filtered by deionized water and ethanol to remove the organic matter and inorganic ions coated on the surface of the product. The product was put into a vacuum oven and dried at a temperature of 60 °C for 10 h to prepare electrode sheets and conduct electrochemical tests.

[0054] The application and testing method of the positive electrode ...

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Abstract

The invention discloses a rechargeable magnesium battery positive electrode material with nano porous metal sulfide and an application method thereof. The positive electrode material is represented by a chemical formula MyCoS(1+x), wherein M is one transition metal element; the x is more than 0 and less than or equal to 1 and the y is more than or equal to 0 and less than or equal to 1. The positive electrode material has a good crystallization property and a regular shape; the reversible embedding / releasing of magnesium ions can be realized. A positive plate is prepared from the positive electrode material and further is prepared into a battery. A rechargeable magnesium battery has an obvious charging / discharging voltage platform and is high in stable specific discharge capacity; after the rechargeable magnesium battery is recycled for 60 times, the specific discharge capacity is also more than 80% of an initial capacity. The rechargeable magnesium battery positive electrode material provided by the invention has excellent electrochemical performance, and is simple in preparation process and low in price, the raw materials are readily available, and the application prospect is very wide.

Description

technical field [0001] The invention relates to a positive electrode material for a battery, in particular to a nanoporous metal sulfide positive electrode material and an application method, and belongs to the field of rechargeable magnesium batteries. Background technique [0002] In recent decades, with the vigorous exploitation of non-renewable resources, coal, oil and other energy sources have become increasingly exhausted, and environmental pollution has also 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 high-speed development of electronic equipment and electric vehicle projects. At present, rechargeable power sources widely used in commercial applications include lead-acid batteries, nickel-metal hydride batteries and lithium secondary batteries. Lithium ba...

Claims

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Application Information

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IPC IPC(8): H01M4/58C01G51/00C01G53/11B82Y30/00
CPCB82Y30/00C01G51/30C01G53/11H01M4/5815H01M10/054Y02E60/10
Inventor 吴晓梅吴丹妮张赟张若然曾小勤丁文江
Owner SHANGHAI JIAO TONG UNIV
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