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Secondary aluminum cell with positive electrode made of double-cladding carbon-sulfur composite material

A secondary aluminum battery and composite material technology, applied in the direction of secondary batteries, battery electrodes, non-aqueous electrolyte storage batteries, etc., can solve the problems of low sulfur content, the effect of improving the overall capacity of the battery is not obvious, and restrict the use range of batteries, etc. Achieve large capacity, improve battery cycle performance, and slow down the loss of sulfur

Inactive Publication Date: 2014-10-01
NANJING ZHONGCHU NEW ENERGY
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the research on positive electrode materials for aluminum-sulfur batteries, before 2005, it was mainly concentrated in the field of polyorganosulfide materials, but because the active temperature of polyorganosulfide materials was mostly above 50°C, the application range of batteries was restricted, and polyorganosulfide materials The sulfur content itself is low, and the effect on the overall capacity of the battery is not obvious, so the research focus of aluminum-sulfur battery cathode materials gradually shifts to carbon / sulfur composite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The carbon nanotube-sulfur-graphene composite material was prepared according to the mass ratio of carbon nanotubes, elemental sulfur and graphene at 1:7:2.

[0050] Step 1, Preparation of carbon nanotube-sulfur composites

[0051] Mix carbon nanotubes and elemental sulfur at a mass ratio of 1:7, and ball mill for 5 hours; under the protection of an inert gas, heat the ball-milled carbon nanotubes and sulfur mixture at a constant temperature of 155°C for 3 hours, and prepare carbon nanotube-sulfur composites after cooling. Material.

[0052] Step 2, preparation of carbon nanotube-sulfur-graphene oxide mixture

[0053] According to the ratio of carbon nanotube-sulfur composite material to graphene oxide mass ratio of 4:1, carbon nanotube-sulfur composite material was added to graphene oxide solution (0.3g / ml), stirred for 4h, and ultrasonically dispersed for 1h to obtain mixture.

[0054] Step 3, carbon nanotube-sulfur-graphene composite material preparation

[0055]...

Embodiment 2

[0057] The carbon nanotube-sulfur-graphene composite material was prepared according to the mass ratio of carbon nanotubes, elemental sulfur, and graphene at 1:8:1, and the others were the same as in Example 1.

Embodiment 3

[0059] The carbon nanotube-sulfur-graphene composite material was prepared according to the mass ratio of carbon nanotubes, elemental sulfur, and graphene at 2:7:1, and the others were the same as in Example 1.

[0060] The carbon nanotube-sulfur-graphene composite material that embodiment one, two, three prepares, conductive agent acetylene black and binding agent PVDF are mixed in proportion (7:2:1), make active material slurry to be coated on 0.6mm On a thick nickel foam substrate, dry and roll to 0.33 mm and cut it into a 40 mm wide × 15 mm long pole piece, and a 0.16 mm thick glass fiber non-woven separator and a negative electrode made of aluminum sheet as the negative electrode active material are wound into a The battery cell is put into a nickel-plated steel shell, and then injected with aluminum chloride-triethylamine hydrochloride ionic liquid electrolyte, and sealed to make an AA-type secondary aluminum battery.

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Abstract

The invention discloses a secondary aluminum cell with a positive electrode made of a double-cladding carbon-sulfur composite material. The secondary aluminum cell comprises the positive electrode, a negative electrode and electrolyte, wherein the active material of the positive electrode is a carbon nano tube-sulfur-graphene composite material, the active material of the negative electrode is a metal aluminum or aluminum alloy, and the electrolyte is non-aqueous aluminiferous electrolyte.

Description

technical field [0001] The invention belongs to the field of electrochemical and new energy products, and relates to a secondary aluminum battery, in particular to a secondary aluminum battery using a positive electrode of "carbon nanotube-sulfur-graphene composite material". Background technique [0002] Compared with existing electrode materials, aluminum, the metal element with the largest reserves in the earth's crust, has the advantages of high theoretical density, abundant resources, low price, environmental friendliness, and safe use. The theoretical energy density of metal aluminum is as high as 2980mAh / g, second only to metal lithium (3682mAh / g), and the volume specific capacity is 8050mAh / cm 3 , about lithium (2040mAh / cm 3 ), and its chemical activity is relatively stable, it is an ideal negative electrode material; elemental sulfur also has a large theoretical energy density (1670mAh / g), which is the positive electrode material with the highest known energy densi...

Claims

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Application Information

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IPC IPC(8): H01M10/05H01M4/62H01M4/13
CPCY02E60/122H01M4/366H01M4/38H01M4/625H01M10/054Y02E60/10
Inventor 赵宇光骆建洲
Owner NANJING ZHONGCHU NEW ENERGY
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