Aluminum sulfur battery and preparation method

A secondary aluminum battery and electrolyte technology, applied in the manufacture of electrolyte batteries, secondary batteries, battery electrodes, etc., can solve the problems of uncontrollable coating uniformity and thickness, poor solubility of conductive polymers, and inability to fully reflect the advantages and other problems , to achieve the effect of inhibiting the dissolution of sulfur, improving stability, and improving electrochemical utilization.

Inactive Publication Date: 2015-01-07
NANJING ZHONGCHU NEW ENERGY
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, the above-mentioned preparation method uses direct chemical oxidation to synthesize conductive polymers, and the coated conductive polymers have poor solubility and low molecular weight, and cannot control the coating uniformity and thickness, and the conjugated structure is incomplete, and the conductivity Not high; solution impregnation is used to compound sulfur in the preparation, sulfur and conductive polymer are only physically combined, the binding force between the two is weak, and the binding of sulfur is weak; in addition, the conductive polymer in the structure of the composite material is only the The form of covering on the outer layer cannot fully reflect the advantages of the polymer-graphene-sulfur three-system composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of graphene airgel: Use graphene oxide powder and deionized water to prepare an aqueous solution with a concentration of 10mg / ml, ultrasonically oscillate for 5 hours, then add 100ml of the prepared graphene oxide aqueous solution into the hydrothermal reactor, and heat at 150°C The graphene oxide hydrogel was prepared by reacting at low temperature for 24 hours, and then the graphene oxide hydrogel was put into ammonia water, soaked at 150°C for 24 hours, and freeze-dried for 24 hours to obtain the graphene oxide airgel.

[0035] (2) Composite polypyrrole: configure 0.2mol / L potassium chloride solution, add 0.1mol / L pyrrole monomer to the solution, adjust the acidity of the solution to pH=3.0 with hydrochloric acid, and place the graphene airgel in Soak in this mixed solution for 20min, then use graphene airgel as working electrode, saturated calomel electrode as reference electrode, platinum electrode as counter electrode, adopt cyclic voltammetry to pr...

Embodiment 2

[0038]The preparation of graphene airgel is the same as that in Example 1. Steps (2) and (3) in Example 1 are reversed. First, compound sulfur on the surface of graphene airgel, and then compound polypyrrole to coat the outermost layer. The polypyrrole / carbon sulfur composite material 2 was obtained.

Embodiment 3

[0040] (1) The preparation of graphene airgel is the same as in Example 1.

[0041] (2) Composite polyaniline: Prepare a sulfuric acid solution with a proton concentration of 0.7mol / L, add 0.1mol / L aniline monomer to it, soak the graphene airgel in the mixed solution for 20min, and then The gel is used as the working electrode, the saturated calomel electrode is used as the reference electrode, and the platinum electrode is used as the counter electrode. Polyaniline is prepared by cyclic voltammetry, the electrodeposition voltage is 0.8V, and the reaction time is 0.5~1h; finally the product is taken out and washed with distilled water , and drying to obtain a polyaniline / graphene airgel composite material.

[0042] (3) Composite sulfur: heat the elemental sulfur to a molten state, put the prepared polyaniline / graphene airgel composite into it under the protection of argon, keep it for 5~10h, take it out and dry it in an oven to form Polyaniline / carbon sulfur composites3.

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PUM

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Abstract

The invention discloses a novel and high-energy secondary aluminum battery and a preparation method thereof. The secondary aluminum battery comprises an anode, a cathode and electrolyte, wherein the anode is made of a conducting polymer/carbon sulfur composite material, and specifically, the anode is made of a three-element composite material of graphene aerogel, conducting polymer and sulfur; the cathode adopts an aluminum-containing cathode and comprises aluminum metal or aluminum alloy; and the electrolyte adopts non-water aluminum-containing electrolyte. The secondary aluminum battery is simple and convenient to prepare and has higher energy density and longer service life.

Description

technical field [0001] The invention belongs to the field of electrochemical and new energy products, and relates to a secondary aluminum battery and a preparation method thereof, in particular to a secondary aluminum battery using a conductive polymer / carbon-sulfur composite material as a positive electrode. Background technique [0002] With the rapid development of mobile electronic and communication devices, the demand for secondary batteries is more urgent, and more and more tends to develop dense, thin, small, light and high energy density batteries. The energy density of aluminum is 2980mAh / g, and it is light in weight, low in price, rich in resources, and safe to use. It is an ideal battery negative electrode material; The application in the secondary battery has been relatively extensive. Therefore, the secondary aluminum-sulfur battery with aluminum metal or aluminum alloy as the negative electrode and sulfur-based materials as the positive electrode is the most a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/054H01M4/36H01M2/16
CPCH01M4/366H01M10/054H01M10/058H01M50/44Y02E60/10Y02P70/50
Inventor 赵宇光钟毓娟
Owner NANJING ZHONGCHU NEW ENERGY
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