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Water-phase electrolyte system zinc iodine secondary battery and preparation method thereof

A secondary battery and electrolyte technology, which is applied in the field of energy storage, can solve the problems of zinc-iodine batteries, such as few reports, and achieve the effects of high iodine loading, mild conditions, and low self-discharge rate

Active Publication Date: 2018-02-06
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, flow batteries are suitable for large-scale energy storage applications, and there are still few reports on zinc-iodine batteries for mobile applications.

Method used

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  • Water-phase electrolyte system zinc iodine secondary battery and preparation method thereof
  • Water-phase electrolyte system zinc iodine secondary battery and preparation method thereof
  • Water-phase electrolyte system zinc iodine secondary battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] 2g of mesoporous carbon material and 2g of elemental iodine are sealed in a container, heated to 40°C and kept for 10 minutes to obtain a composite, and the obtained composite is heated to 120°C and kept for 2 hours to finally obtain an iodine / mesoporous carbon composite . Grind the iodine / mesoporous carbon composite, acetylene black, and sodium carboxymethylcellulose uniformly at a mass ratio of 8:1:1 to obtain a mixture. Water was added to the mixture and stirred to obtain a slurry, which was spread onto aluminum foil. After being completely dried under the condition of 80° C. in a vacuum environment, the positive electrode of the battery is obtained. A Zamak3 alloy with a thickness of 0.2 mm was taken, mechanically polished and cleaned to obtain a battery negative electrode. Prepare a zinc nitrate aqueous solution with a concentration of 2 mol / liter as the electrolyte. A 2032-type button cell was assembled with glass fiber as a separator.

[0022] figure 1 It is...

Embodiment 2

[0024] 3g of activated carbon fibers and 2g of elemental iodine are sealed in a container, heated to 60°C and kept for 25 minutes to obtain a composite. The resulting composite was heated to 150° C. and kept for 4 hours to finally obtain an iodine / activated carbon fiber composite. The iodine / activated carbon fiber composite, Ketjen black and polytetrafluoroethylene are ball milled uniformly at a mass ratio of 7:2:1 to obtain a mixture. Water was added to the mixture and stirred evenly to obtain a slurry, which was coated onto stainless steel foil. After being completely dried under the condition of 80° C. in a vacuum environment, the positive electrode of the battery is obtained. The high-purity zinc foil with a thickness of 0.1 mm was manually polished and cleaned to obtain the negative electrode material. Use qualitative filter paper as the diaphragm. Prepare an aqueous zinc sulfate solution with a concentration of 1 mol / L as the electrolyte. A positive electrode materia...

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Abstract

The invention discloses a water-phase electrolyte system zinc iodine secondary battery and a preparation method thereof. The battery comprises a positive electrode, a negative electrode, a water-phaseelectrolyte and a diaphragm. The positive electrode is a composition material containing iodine, the negative electrode is pure zinc or zinc base alloy, and the water-phase electrolyte is a zinc saltwater solution. When the battery works, reversible chemical reaction between zinc and iodine is carried out, so that the battery is essentially different from a zinc ion battery on the basis of reversibly embedding or separating a zinc ion in / from a positive electrode material. The built zinc iodine secondary battery has a simple structure, good safety, high energy density, low material cost, environment protection, and a better application prospect.

Description

technical field [0001] The invention belongs to the technical field of energy storage, and in particular relates to a zinc-iodide secondary battery with an aqueous phase electrolyte system and a preparation method thereof. Background technique [0002] Due to the advantages of metal zinc with low electrode potential, high energy density, environmental friendliness, and stability in water, zinc secondary batteries based on aqueous electrolytes are therefore regarded as a promising energy storage device, which has attracted much attention in the last decade. s concern. In 2012, Kang Feiyu's research group at Tsinghua University reported a water-phase zinc / manganese dioxide battery that can be stably cycled 100 times (Xu, C., Li, B., Du, H. & Kang, F. Energetic Zinc Ion Chemistry: The Rechargeable Zinc Ion Battery. Angew. Chem. Int. Ed. 51, 933). Chinese patent CN 105449194 A discloses a method for preparing a positive electrode material for a zinc-nickel battery. The zinc-n...

Claims

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Application Information

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IPC IPC(8): H01M10/36H01M4/38H01M4/42
CPCH01M4/38H01M4/42H01M10/36Y02E60/10
Inventor 袁志好柏冲蔡锋石
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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