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Aluminum ion secondary battery and positive electrode material thereof

A technology for secondary batteries and positive electrode materials, applied in secondary batteries, battery electrodes, positive electrodes, etc., can solve problems such as unreported patents, and achieve the effects of improving stability and safety, stable price cycle, and excellent rate performance

Pending Publication Date: 2021-10-22
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, no patent has been reported on the preparation of polyaniline materials in organic acids as positive electrodes for aluminum ion secondary batteries

Method used

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  • Aluminum ion secondary battery and positive electrode material thereof
  • Aluminum ion secondary battery and positive electrode material thereof
  • Aluminum ion secondary battery and positive electrode material thereof

Examples

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Embodiment approach 1

[0020] The invention discloses a positive electrode material for an aluminum ion secondary battery. The positive electrode material is composed of polyaniline prepared by phytic acid and a conductive carbon matrix. The method for preparing polyaniline by chemical oxidative polymerization is as follows:

[0021] Weigh 28.3 g of 70% phytic acid solution, slowly adjust the volume to 100 mL with deionized water, mix well, and obtain a concentration of 0.3 mol L -1 phytic acid solution, weighed 11.4 g of ammonium persulfate crystals with a balance, and dissolved them in 25 mL of deionized water with gentle stirring. Add 4.7 g of aniline solution dropwise with a dropper, and stir for more than 10 minutes in an ice-water bath (0 °C). The ammonium persulfate solution was dropped through the dropping funnel, placed in a magnetic stirrer, and the reaction was continued for 1 hour with a magnetic stirrer, and the entire polymerization process was kept in an ice-water bath. After the po...

Embodiment approach 2

[0027] The invention discloses a positive electrode material for an aluminum ion secondary battery. The positive electrode material is composed of polyaniline prepared by citric acid and a conductive carbon matrix. The method for preparing polyaniline by emulsion polymerization is as follows:

[0028] Add 12.8 g of citric acid powder to 100 mL of deionized water and mix well to obtain H + The concentration is 2 molL -1 of citric acid solution. Add 4.7 g of aniline solution in the reactor, after mixing with the citric acid solution, add water successively, xylene is fully stirred, until obtaining transparent emulsion, then in the emulsion, ammonium persulfate solution is added dropwise, keeping the system temperature at 10 Below ℃, continue to stir, add acetone to break the emulsification after the color becomes dark, then filter, wash with water and citric acid solution in turn until the solution is basically colorless, and dry to obtain polyaniline powder prepared by citric...

Embodiment approach 3

[0033] The invention discloses a positive electrode material for an aluminum ion secondary battery. The positive electrode material is composed of polyaniline prepared by 2-naphthalenesulfonic acid and a conductive carbon matrix. The method for preparing polyaniline by electrochemical polymerization is as follows:

[0034] Weigh 21.25 g of 2-naphthalenesulfonic acid powder, slowly add 100 mL of deionized water, mix well, and obtain a concentration of 1 mol L -1 2-naphthalenesulfonic acid solution. Add 4.7 g of distilled aniline into the acid solution and stir evenly to obtain an electrolyte solution. With platinum wire as counter electrode and platinum microdisk electrode as working electrode, Cu / CuF 2 As a reference electrode, electrochemical polymerization was carried out by potentiodynamic scanning method in an electrolytic cell containing electrolyte and aniline, and a polyaniline film was obtained after 1 hour of reaction.

[0035] The preparation method of aluminum io...

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Abstract

The invention relates to the field of novel energy storage batteries, and discloses an aluminum ion secondary battery and a positive electrode material thereof, the main component of the positive electrode material is a polyaniline / conductive carbon matrix composite material prepared from organic acid, and on the basis of low cost, polyaniline prepared from large-volume organic acid has a good spatial three-dimensional structure and a high specific surface area. Abundant channels are provided for migration of ions and electrons, the exposure of catalytic active sites is improved, and the stability and safety of the battery are improved. The aluminum ion secondary battery prepared from the positive electrode material has the advantages of excellent rate capability, good specific discharge capacity, long cycle life, stable price cycle, low cost, wide voltage window, cleanness, environmental protection, high coulombic efficiency, high safety and the like, and can be applied to the fields of electronic industry, communication industry, energy storage and the like.

Description

technical field [0001] The invention relates to the field of novel energy storage batteries, in particular to an aluminum ion secondary battery and its positive electrode material. Background technique [0002] In recent years, with the gradual depletion of traditional fossil energy and the increasingly serious environmental problems, the new energy industry has received more and more attention. Among them, the lithium-ion battery is developing rapidly, but its high application cost and potential safety problems limit its development. Aluminum-ion secondary batteries are expected to make up for these shortcomings and are attracting people's attention. [0003] Rechargeable aluminum-ion secondary batteries are considered to be a new generation of large-scale energy storage devices due to their rich aluminum source, high specific capacity and high energy density that are second only to lithium batteries. However, Al-ion secondary batteries lack suitable cathode materials wit...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M4/62H01M10/054C08G73/02
CPCH01M4/606H01M4/625H01M10/054C08G73/0266H01M2004/021H01M2004/028Y02E60/10
Inventor 魏国康乔佳杨建红
Owner JIANGSU UNIV
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