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Graphene secondary aluminum battery and preparation method for anode composite material of graphene secondary aluminum battery

A secondary aluminum battery and composite material technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve the problems of easy loss of small molecule sulfide, complicated polymer preparation process, and restrictions on large-scale promotion, and reduce the The effect of positive electrode capacity loss, easy preparation, and high yield

Inactive Publication Date: 2015-06-03
NANJING ZHONGCHU NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the positive electrode materials used in aluminum batteries, elemental sulfur and organic polysulfur compounds, in the process of charging and discharging, the small molecular sulfides produced are easy to lose, and the conductivity of the substances is not high.
Although vulcanized polymers solve the problem of conductivity, the preparation process of polymers is complicated and the yield is very low, which limits large-scale promotion

Method used

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  • Graphene secondary aluminum battery and preparation method for anode composite material of graphene secondary aluminum battery

Examples

Experimental program
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Effect test

Embodiment example 1

[0042] The preparation steps of the material described in the scheme are:

[0043]1. Preparation of graphene (rGO): a) Pre-oxidation of graphite: Add 3 g of graphite powder into 200 mL of concentrated sulfuric acid and stir for half an hour; then add 1 g of phosphorus pentoxide and 3g of potassium persulfate, adjust the reaction temperature to 80°C, react for 6h, after the reaction is completed, wash with ultrapure water until neutral, and dry at 40°C in a blast drying oven for later use. b) Preparation of graphene oxide: add pre-oxidized graphite into 150mL concentrated sulfuric acid, ultrasonically, stir and disperse for half an hour; then add 14g potassium permanganate into concentrated sulfuric acid, control the temperature below 10°C, and react for 1h; Transfer the reaction solution to a water bath at 35°C, and stir it magnetically for 5 hours; to end the reaction, transfer the reaction beaker to an ice-water bath, add 300mL ultrapure water to dilute, and control the temp...

Embodiment example 2

[0047] The steps are the same as in case 1, the raw material is replaced with 2-mercaptobenzimidazole, and the product is dibenzimidazole disulfide / graphene composite material. The battery preparation and testing methods are the same as Case 1.

Embodiment example 3

[0049] The steps are the same as in case 1, the raw material is replaced with 1-mercaptobenzotriazole, and the product is dibenzotriazole disulfide / graphene composite. The battery preparation and testing methods are the same as Case 1.

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Abstract

The invention discloses a graphene secondary aluminum battery. The graphene secondary aluminum battery comprises an anode, a cathode and electrolyte. The cathode is one of metal aluminum or an alloy thereof; the electrolyte is acidic halogen aluminate ionic liquid; the anode is a graphene / sulfide benzoheterocycle compound composite material; the graphene comprises a single layer or a few layers of the graphene; the sulfide benzoheterocycle compound is a compound containing any feature structure shown as the following structural formula in the specification.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry and new energy products, and relates to a novel aluminum-sulfur secondary battery. More specifically, it relates to a method for preparing a sulfurized benzoheterocyclic compound / graphene composite material, and a secondary aluminum battery prepared by using it as a positive electrode active material. Background technique [0002] With the rapid development of smaller, lighter and higher performance electronic and communication devices, there is an increasing demand for the performance of batteries used in these devices. Aluminum-sulfur batteries offer great hope for future high-capacity secondary batteries, but at the same time face great challenges. The main problem of aluminum-sulfur batteries at present is the poor cycle performance caused by the dissolution and migration of polysulfide ions. If the elemental sulfur can be uniformly dispersed in the positive electrode composite mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/36H01M4/60
CPCH01M4/362H01M4/60H01M4/625H01M10/054Y02E60/10
Inventor 赵宇光陈安良
Owner NANJING ZHONGCHU NEW ENERGY