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High-energy-density aluminum secondary battery and positive electrode material thereof, and preparation method ofpositive electrode material

An aluminum secondary battery, high energy density technology, applied in the field of electrochemical energy storage, can solve the problems of poor cycle stability and low energy density, and achieve the effects of reducing dosage, high specific capacity and high energy density

Pending Publication Date: 2020-12-04
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of low energy density and poor cycle stability of the positive electrode materials in the prior art, and provide a high energy density aluminum secondary battery and its positive electrode material and preparation method

Method used

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  • High-energy-density aluminum secondary battery and positive electrode material thereof, and preparation method ofpositive electrode material
  • High-energy-density aluminum secondary battery and positive electrode material thereof, and preparation method ofpositive electrode material
  • High-energy-density aluminum secondary battery and positive electrode material thereof, and preparation method ofpositive electrode material

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preparation example Construction

[0052] The physical preparation method includes: weighing an appropriate amount of transition metal sulfide and a sulfur source, placing them in a ball mill tank, and performing sealed ball milling at 100-1000rmp for 1-48 hours to obtain a transition metal sulfide / sulfur composite positive electrode material; wherein the sulfur source is Elemental sulfur or aluminum polysulfide Al 2 S z ; where 3≤z≤8. Of course, carbon materials can also be added to form transition metal sulfide / sulfur / carbon composite cathode materials.

[0053] The chemical preparation method may include: weighing an appropriate amount of transition metal sulfide and adding it to an organic solution in which elemental sulfur is dissolved, heating and evaporating the organic solvent to precipitate elemental sulfur on the surface of the transition metal sulfide, and obtaining a transition metal sulfide / sulfur composite positive electrode material; , the organic solvent is one or more of tetrahydrofuran, o-xy...

Embodiment 1

[0060] This embodiment provides a Mo 6 S 8 / S / C composite cathode material preparation and performance test.

[0061] (1) Add 0.8g Mo 6 S 8 Add 0.2g S element into the zirconia ball mill jar, and ball mill for 24 hours at a speed of 200rpm;

[0062] (2) Add 0.1g Ketjen black and 0.1g graphene in above-mentioned ball mill jar, continue ball milling 24 hours;

[0063] (3) Mix the material obtained in the above step (2) with the conductive agent Super P and the binder polytetrafluoroethylene in a mass ratio of 8:1:1, roll it on the positive electrode current collector, and vacuum at 55°C Dry for 10 hours to obtain the positive electrode;

[0064] (4) In a glove box filled with argon, with metal aluminum as the negative electrode and glass fiber GF / A as the diaphragm, AlCl 3 / [EMIm]Cl is the electrolyte solution and the positive electrode obtained in the above step (3) to assemble the aluminum secondary battery pouch battery.

[0065] (5) After the battery obtained in the a...

Embodiment 2

[0069] This embodiment provides a Cu 0.5 Mo 6 S 8 / S / C composite cathode material preparation and performance test.

[0070] (1) Add 0.2g Cu 0.5 Mo 6 S 8 , 0.8g S element, 2g Super P and 2g carbon nanotubes were added to the zirconia ball mill jar, and ball milled for 24 hours at a speed of 600rpm;

[0071] (2) Mix the material obtained in the above step (1) with the conductive agent Super P and the binder polytetrafluoroethylene in a mass ratio of 8:1:1, roll it on the positive electrode current collector, and vacuum at 55°C Dry for 10 hours to obtain the positive electrode;

[0072] (3) In a glove box filled with argon, with metal aluminum as the negative electrode, glass fiber GF / A as the diaphragm, AlCl 3 / [EMIm]Cl is an aluminum secondary battery pouch battery assembled with the positive electrode obtained in the above step (2) and the electrolyte.

[0073] (4) After the battery obtained in the above step (3) was left to stand for 3 hours, its electrochemical perf...

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Abstract

The invention discloses a high-energy-density aluminum secondary battery and a positive electrode material thereof, and a preparation method of the positive electrode material. The high-energy-densityaluminum secondary battery comprises a positive electrode containing a transition metal sulfide / sulfur composite positive electrode material, an electrolytic solution, a negative electrode and a diaphragm, wherein in the transition metal sulfide / sulfur composite positive electrode material, the transition metal sulfide is MxSy, M is a cation and comprises one or more solid solutions of Mo, Ti, Cu, Co, V, Fe, Cr, Ni, Mn, Zn, Sc, Nb, Mo, Zr, W, Re and Ta, x is greater than or equal to 0.01 and less than or equal to 9, y is greater than or equal to 1 and less than or equal to 8, x and y satisfycompound electric neutrality, the sulfur source comprises elemental sulfur and / or aluminum polysulfide Al2Sz, z is greater than or equal to 3 and less than or equal to 8, the mass percent of the transition metal sulfide is 5-95%, and the mass percent of the sulfur source is 5-95%.

Description

technical field [0001] The invention relates to the technical field of electrochemical energy storage, in particular to a high-energy-density aluminum secondary battery and its positive electrode material and preparation method. Background technique [0002] The environmental crisis caused by increasingly severe climate change and the energy demand brought about by population growth are stimulating the exploration of various forms of advanced energy storage technologies around the world. At present, electrochemical energy storage represented by lithium-ion battery systems is relatively High conversion efficiency and flexibility have become key elements in the development of new energy technologies. However, limited by the global reserves of lithium metal and the problems of safety and low energy density in the application process, it has become a priority to find other low-cost, high-safety, high-energy-density secondary battery systems to replace the existing lithium-ion ba...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/58H01M4/62H01M10/054
CPCH01M4/362H01M4/38H01M4/5815H01M4/628H01M10/054H01M2004/021H01M2004/028Y02E60/10
Inventor 索鎏敏林泽京李泓陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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