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Potassium iodide double-ion battery and preparation method thereof

A dual-ion and battery technology, applied in the manufacture of electrolyte batteries, secondary batteries, battery electrodes, etc., can solve the problems of rare reports of non-metal ion batteries, no reports of iodine ion batteries, and expensive positive and negative materials. Good cycle stability, great application value and market prospect, low cost effect

Active Publication Date: 2019-12-03
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, due to the demand for large-scale energy storage and considering the safety and cost of commercial lithium batteries, metal-ion batteries have received extensive attention and made great progress, but non-metal-ion batteries have rarely been reported.
The breakthrough of fluoride-ion batteries has pointed out the direction for non-metal ion batteries, but due to its harsh application conditions and expensive positive and negative electrode materials, it is difficult to be popularized and applied in a short time
As an element of the same main group as fluorine, iodine is abundant in the ocean and has a high theoretical specific capacity (211mAh g -1 ) have been widely used in batteries in recent years, but they are all based on the principle of redox reaction of iodide ions to improve the performance of batteries, but no one has reported iodine ion batteries based on the principle of single iodine ion intercalation

Method used

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  • Potassium iodide double-ion battery and preparation method thereof
  • Potassium iodide double-ion battery and preparation method thereof
  • Potassium iodide double-ion battery and preparation method thereof

Examples

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Effect test

Embodiment 1

[0018] The positive electrode is made of carbon black and binder (polyvinylidene fluoride PVDF), and its mass ratio is carbon black / PVDF=24mg:6mg, and then 120mg of N-methylpyrrolidone (NMP) is slowly dropped into it, and ground to make a slurry. Finally, the slurry was coated on a 50-micron-thick stainless steel current collector, and dried in a vacuum oven at 60° C. for 12 hours to obtain a positive electrode sheet. Dissolve 0.83g of potassium iodide in 10ml of ethylene glycol to prepare a 0.5mol / L electrolyte, select a zinc foil with an area of ​​3cm*3cm and a thickness of 50 microns as the negative electrode of the iodine-potassium dual-ion battery, and assemble it into a soft pack battery .

Embodiment 2

[0020] The positive electrode is made of carbon black and binder (polyvinylidene fluoride PVDF), and its mass ratio is carbon black / PVDF=24mg:6mg, and then 120mg of N-methylpyrrolidone (NMP) is slowly dropped into it, and ground to make a slurry. Finally, the slurry was coated on a 50-micron-thick stainless steel current collector, and dried in a vacuum oven at 60° C. for 12 hours to obtain a positive electrode sheet. Dissolve 1.66g of potassium iodide in 10ml of ethylene glycol to prepare a 1mol / L electrolyte, select a zinc foil with an area of ​​3cm*3cm and a thickness of 50 microns as the negative electrode of the potassium iodide dual-ion battery, and assemble it into a soft pack battery.

Embodiment 3

[0022] The positive electrode is made of carbon black and binder (polyvinylidene fluoride PVDF), and its mass ratio is carbon black / PVDF=24mg:6mg, and then 120mg of N-methylpyrrolidone (NMP) is slowly dropped into it, and ground to make a slurry. Finally, the slurry was coated on a 50-micron-thick stainless steel current collector, and dried in a vacuum oven at 60° C. for 12 hours to obtain a positive electrode sheet. Dissolve 2.49g of potassium iodide in 10ml of ethylene glycol to prepare a 1.5mol / L electrolyte, select a zinc foil with an area of ​​3cm*3cm and a thickness of 50 microns as the negative electrode of the iodine-potassium dual-ion battery, and assemble it into a soft pack battery .

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Abstract

The invention discloses a potassium iodide double-ion battery and a preparation method thereof, which belong to the field of batteries. The positive electrode active material is carbon black, the negative electrode material is zinc foil, the solute of the electrolyte is potassium iodide, and the solvent of the electrolyte is ethylene glycol. Carbon black and a binder are firstly mixed in proportion; N-methyl pyrrolidone is slowly dripped and slurry is obtained through grinding; a stainless steel current collector is later coated with the slurry, and vacuum drying is carried out to prepare a positive plate; and finally, potassium iodide is dissolved in ethylene glycol to prepare an electrolyte, and a soft package battery is assembled with the zinc foil as a negative electrode. When the zincfoil metal material is used as the negative electrode to coordinate with iodide ions, stable open-circuit voltage and good cycling stability are shown, meanwhile, zinc and potassium ions in the electrolyte form a shared electronic structure, and the potassium iodide double-ion battery is formed. Compared with a water-based electrolyte, the electrolyte adopting the ethylene glycol system has the advantages that the corrosion of hydrogen evolution and oxygen evolution reaction to the electrode is avoided, and the cycle life of the iodine ion battery is greatly prolonged.

Description

technical field [0001] The invention belongs to the field of batteries, and provides a novel iodine-potassium double-ion battery and a preparation method thereof. Background technique [0002] In recent years, due to the demand for large-scale energy storage and considering the safety and cost of commercial lithium batteries, metal-ion batteries have received extensive attention and made great progress, but non-metal-ion batteries have rarely been reported. The breakthrough of fluoride-ion batteries has pointed out the direction for non-metal ion batteries, but due to its harsh application conditions and expensive positive and negative electrode materials, it is difficult to be popularized and applied in a short time. As an element of the same main group as fluorine, iodine is abundant in the ocean and has a high theoretical specific capacity (211mAh g -1 ) have been widely used in batteries in recent years, but they are all based on the redox reaction principle of iodide i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M10/0568H01M10/0569H01M10/054H01M10/058
CPCH01M4/38H01M10/0568H01M10/0569H01M10/054H01M10/058H01M2300/0025H01M2300/0028Y02E60/10Y02P70/50
Inventor 李明强李航
Owner DALIAN UNIV OF TECH
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