Secondary aluminum battery and preparation method of anode thereof

A secondary aluminum battery, battery cathode technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve the problems of not reaching the theoretical electrode potential, hindered ion diffusion, fracture, etc., to increase the effective reaction area, material Wide source, good cycle performance

Inactive Publication Date: 2010-06-30
无锡欧力达新能源电力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because of many problems that aluminum electrodes will produce in aqueous electrolytes: (1) There is a strong affinity between aluminum alloys and oxygen. In air and aqueous solutions, a dense passivation oxide film is formed on the surface, making aluminum The electrode potential in the neutral solution does not reach the theoretical electrode potential, and the actual working potential of aluminum is much lower than the theoretical value, which also causes voltage hysteresis during discharge.
(2) Aluminum is a typical amphoteric metal with high activity and is easy to react with acid and alkali to destroy the oxide film. Once the oxide film is destroyed, it will be corroded quickly, which makes the utilization rate of the electrode low and the wet storage performance is low. Difference
(3) Aluminum has a large self-corrosion in alkaline solution, and it is prone to serious hydrogen evolution reaction with the medium, which reduces the utilization rate of the electrode and affects the normal operation of the battery
(4) In alkaline medium, the products of aluminum anode flow reaction and corrosion reaction are colloidal Al(OH) 3 , not only reduces the conductivity of the electrolyte...

Method used

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Examples

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preparation example Construction

[0027] A kind of preparation method of the battery anode material polythiopolystyrene of secondary aluminum battery, comprises the steps:

[0028] (1) Preparation of chlorinated polystyrene: polystyrene and aluminum chloride are mixed according to mass ratio 8: 1, then join in the carbon tetrachloride solvent of 10ml / g (polystyrene) and reflux, wait for its After fully dissolving, feed chlorine gas, continue to reflux for 6 hours, cool naturally after the reaction, then pour into 200ml of methanol, settle the product, wash, filter, and vacuum-dry the product for later use;

[0029] (2) Preparation of polythiopolystyrene: After anhydrous sodium sulfide and sublimated sulfur are mixed according to the molar ratio of 1:1~1:6, quantitative N,N- Stir dimethylformamide at room temperature for 2 hours, then raise the temperature to 20-120° C., continue stirring for 12 hours, and protect with inert gas to obtain a sodium polysulfide solution. The prepared chlorinated polystyrene is a...

Embodiment 1

[0055] Activated carbon and elemental sulfur are mixed in a mass ratio of 1:3 and placed in a ball milling tank, ball milled for 6 hours at a ball-to-material ratio of 1:1 at a speed of 200r / min, and then placed in a resistance furnace under argon protection at 350°C After heating and compounding for 3 hours, carbon-sulfur composite materials were obtained after natural cooling. The carbon-sulfur composite material (mass ratio 1:3) is used as the positive electrode material, and the conductive agent SUPER-P and the binder PVDF are added in a ratio of 7:2:1, and the positive electrode active material slurry is coated on the foamed nickel substrate. The pole pieces formed by drying and rolling, and the glass fiber non-woven diaphragm and the negative electrode made of aluminum sheet as the negative electrode active material are wound into electric cores and put into nickel-plated steel shells, and then added aluminum trichloride and phenyl trimethyl The ionic liquid electrolyte ...

Embodiment 2

[0057] The preparation method of the positive electrode is the same as in Example 1, the active material of the negative electrode is an electrochemically activated aluminum sheet, and the battery is assembled according to the same method as in Example 1. During the battery charge and discharge cycle test, charge at 1C to 2.4V, and discharge at 0.5C to 1.2V.

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Abstract

The invention discloses a secondary aluminum battery and a preparation method of anode thereof; the secondary aluminum battery comprises a battery anode, a battery cathode, an electrolyte, a diaphragm and a current collector; the battery cathode is made of aluminum or aluminum alloy; the battery anode is made of polystyrene polysulfide or carbonyl sulfide composite material; and the electrolyte is halogen aluminic acid ionic liquid. The preparation method of secondary aluminum battery anode material (polystyrene polysulfide) comprises the following steps: (1) preparing chlorination polystyrene; (2) preparing polystyrene polysulfide; (3) slowly dropping sodium polysulfide solution into chlorination polystyrene solution according to the proportion of Na to C1 being 1: 1 at the temperature of 50 to 150 DEG C, stirring so as to react about 24 hours. Powder product is obtained after cleaning and extracting to obtain polystyrene polysulfide product dried about 24 hours in vacuum at the temperature of 80 DEG C.

Description

technical field [0001] The invention relates to a secondary aluminum battery and a method for preparing a positive electrode thereof. Background technique [0002] The rapid development of new power sources such as smaller, lighter and higher-performance electronic and communication equipment, electric vehicles, and wind power generation, photovoltaic power generation, etc., has put forward higher and higher requirements for the battery performance of the supporting power supply. Currently commercialized lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries and lithium-ion batteries can no longer meet these requirements. There is an urgent need to develop power batteries and energy storage batteries with the characteristics of high energy, low cost, long life, green environmental protection, abundant battery material resources, and recyclable utilization. Secondary aluminum-sulfur batteries with aluminum metal or aluminum alloys as negative electrode...

Claims

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Application Information

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IPC IPC(8): H01M10/054H01M4/1399H01M4/60
CPCY02E60/122Y02E60/12Y02E60/10
Inventor 赵宇光黄兆丰
Owner 无锡欧力达新能源电力科技有限公司
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