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Preparation method and using method of cathode material for high-capacity aluminum cell

A cathode material, aluminum battery technology, applied in battery electrodes, secondary batteries, battery pack components, etc., can solve the problems of poor battery performance, limited theoretical capacity, complex process flow, etc.

Active Publication Date: 2019-05-31
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Compared with other cathode materials, carbon-based cathode materials are rich in resources, low in cost, stable in structure, and do not have side reactions with electrolytes. Batteries assembled with this material have excellent cycle performance and rate performance; however, pyrolytic graphite Prepared by chemical vapor deposition, the whole process is complicated, and the performance of the battery is relatively poor; carbon-based materials can be modified by different methods, which can improve the performance of the battery to a certain extent, but the theoretical capacity is limited. its application in commercial aluminum batteries

Method used

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  • Preparation method and using method of cathode material for high-capacity aluminum cell

Examples

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Embodiment 1

[0051] Using the drop casting method, graphene oxide-carbon fiber film is made with graphene oxide aqueous phase dispersion and carbon fiber, the carbon fiber is placed on the cellulose filter membrane, and the graphene oxide aqueous phase dispersion is added dropwise on the carbon fiber, and the graphite oxide Graphene and carbon fiber composite; the concentration of graphene oxide aqueous dispersion is 1mg / mL, and the diameter of carbon fiber is ≤10μm; the dosage ratio of graphene oxide aqueous dispersion and carbon fiber is 1:1 according to the mass ratio of graphene oxide and carbon fiber ;

[0052] Dry the graphene oxide-carbon fiber film at room temperature for 60 minutes, and then dry it at 120°C for 24 hours under vacuum to make a dry film;

[0053] Immerse the dried film in hydroiodic acid solution, reduce it at 40°C for 24h, then wash off the acid solution on the surface with deionized water, then wash off the moisture on the surface with absolute ethanol, and finall...

Embodiment 2

[0059] The preparation method of the positive electrode material for high-capacity aluminum batteries is the same as in Example 1, the difference is that:

[0060] (1) Adopt vacuum filtration method, make graphene oxide-carbon fiber film with graphene oxide aqueous phase dispersion liquid and carbon fiber, place carbon fiber on the cellulose filter membrane, then place in the funnel, add graphene oxide aqueous phase to disperse After liquid, graphene oxide and carbon fiber composite, while part of the water is separated by suction filtration; the concentration of graphene oxide aqueous phase dispersion is 2mg / mL; the dosage ratio of graphene oxide aqueous phase dispersion and carbon fiber The mass ratio is 2:1;

[0061] (2) Dry the graphene oxide-carbon fiber film at room temperature for 55 minutes, and then dry it at 130°C and vacuum for 22 hours;

[0062] (3) Reduction at 80°C for 10h, washing with water and alcohol and drying at 150°C under vacuum for 18h; the mass concent...

Embodiment 3

[0068] The preparation method of the positive electrode material for high-capacity aluminum batteries is the same as in Example 1, the difference is that:

[0069] (1) The concentration of graphene oxide aqueous phase dispersion is 2mg / mL; The consumption ratio of graphene oxide aqueous phase dispersion and carbon fiber is 3:1 by the mass ratio of graphene oxide and carbon fiber;

[0070] (2) Dry the graphene oxide-carbon fiber film at room temperature for 50 minutes, and then dry it at 140°C and vacuum for 20 hours;

[0071] (3) Reduction at 100°C for 1h, washing with water and alcohol and drying at 200°C under vacuum for 12h; the mass concentration of HI in the hydroiodic acid solution is 55%;

[0072] (4) Microwave treatment for 10s;

[0073] Using method is the same as embodiment 1, and difference is:

[0074] (1) The electrolyte used in the assembly of aluminum batteries is AlCl 3 - Urea; AlCl in electrolyte 3 The molar percentage of the electrolyte is 57%; the electr...

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Abstract

The invention relates to a preparation method and a using method of a cathode material for a high-capacity aluminum cell. The preparation method comprises that (1) an oxidized graphene-carbon fiber film is prepared by a drop casting method or a vacuum filtration method; (2) the film is dried under the condition of room temperature to 70 DEG C, and then dried at 120-200 DEG C under the vacuum condition; (3) the dry film is immersed into a hydroiodic acid solution for reduction, washed by water and alcohol, and dried; or is heated to 300-500 DEG C in the inert atmosphere and thermally insulated;or heated to 800-1000 DEG C in the reducing atmosphere and thermally insulated; and (4) microwave processing is implemented. The using method comprises that the cathode material for the high-capacityaluminum cell serves as the anode, and the anode, cathode, electrode diaphragm and an electrolyte are assembled into the aluminum cell. In the charging / discharging material, electrochemical reactionof the cathode material is embedding or removing of chloride ion [Cl]-, the theoretical capacity can reach 2231mAh.g-1, and the practical specific capacity density can reach 300-1200 mAh.g-1.

Description

technical field [0001] The invention belongs to the technical field of aluminum batteries, in particular to a method for preparing and using a positive electrode material for high-capacity aluminum batteries. Background technique [0002] Metal aluminum is an excellent battery anode material, and its mass specific capacity density can reach 2980mAh·g -1 , the volume specific capacity density can reach 8040mAh·cm -3 ; Aluminum batteries have not been commercialized so far, and are basically in the laboratory research stage. The main obstacle hindering commercialization is: the mass specific capacity density of the positive electrode material of the existing high-voltage aluminum battery does not exceed 150mAh g -1 ; the working voltage of aluminum batteries with positive electrode materials with high specific capacity density is usually not higher than 1V, and the cycle stability of the battery is poor; the electrolyte used is usually expensive; these factors lead to the spe...

Claims

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Application Information

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IPC IPC(8): H01M4/583H01M10/054H01M2/16H01M4/133H01M4/134H01M10/0567H01M50/409
CPCH01M10/0567H01M10/054H01M4/134H01M4/133H01M4/583H01M4/1393Y02E60/10H01M50/409
Inventor 高炳亮李启明刘成员刘智伟牛宏坤王兆文胡宪伟石忠宁
Owner NORTHEASTERN UNIV
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