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A bromide ion battery

A bromide ion and battery technology, applied in the field of new bromide ion batteries, can solve the problems of limited development, toxic and volatile bromine element, and achieve the effects of improving safety, low price, and high theoretical specific capacity

Active Publication Date: 2022-03-29
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bromine due to higher theoretical specific capacity (335mAh / g Br2 ) are widely used in batteries, such as lithium-bromine, magnesium-bromine batteries and zinc-bromine flow batteries [Yao, X.H., Luo, J.R., Dong, Q. & Wang, D.W. Arechargeable non-aqueous Mg-Br-2battery. Nano Energy 28,440- 446, doi: 10.1016 / j.nanoen.2016.09.003(2016).; Chang, Z. et al. Rechargeable Li / / Br battery: apromising platform for post lithium ion batteries. J Mater Chem A 2, 19444-19450, doi:10.1039 / c4ta04419c(2014).; Lai,Q.Z.,Zhang,H.M.,Li,X.F.,Zhang,L.Q.&Cheng,Y.H.A novel single flow zinc-bromine battery with improved energydensity.J Power Sources 235,1-4,doi: 10.1016 / j.jpowsour.2013.01.193(2013).], but further development is limited due to the toxicity and volatility of bromine
[0003] Bromine ions can perfectly solve this defect. At the same time, most of the applications of bromine in batteries are based on the redox reaction of bromine to improve the performance of batteries. No one has reported batteries based on a single bromine ion intercalation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Put carbon black and binder (PVDF) in an agate grinding bowl with a mass ratio of 80:20, use N-methylpyrrolidone (NMP) as a solvent to grind and make slurry, and then smear the slurry on a 50 micron thick The area is 2.5cm*2.5cm on several stainless steel foils, and finally put the smeared sheet in a vacuum drying oven, and dry it at 80°C for 12 hours to obtain a working electrode sheet. Dissolve 1.96g of ammonium bromide in 10ml of ethylene glycol to prepare a 2mol / L electrolyte. Use 50 micron thick zinc foil as the negative electrode material of the bromide ion battery, assemble it into a pouch battery for performance testing, as shown in the attached image 3 As shown, under the charge and discharge current density of 2A / g, the capacity of the bromide ion battery still reaches 141mAh / g after 3000 cycles.

Embodiment 2

[0020] Put carbon black and binder (PVDF) in an agate grinding bowl with a mass ratio of 80:20, use N-methylpyrrolidone (NMP) as a solvent to grind and make slurry, and then smear the slurry on a 50 micron thick The area is 2.5cm*2.5cm on several stainless steel foils, and finally put the smeared sheet in a vacuum drying oven, and dry it at 80°C for 12 hours to obtain a working electrode sheet. Dissolve 1.96g of ammonium bromide in 10ml of ethylene glycol to prepare a 2mol / L electrolyte. Use copper foil with a thickness of 50 microns as the negative electrode material of bromide ion battery, and assemble it into a pouch battery for performance testing, as shown in the attached image 3 As shown, under the charge and discharge current density of 2A / g, the bromide ion battery has a capacity of 85mAh / g after 500 cycles.

Embodiment 3

[0022] Put carbon black and binder (PVDF) in an agate grinding bowl with a mass ratio of 80:20, use N-methylpyrrolidone (NMP) as a solvent to grind and make slurry, and then smear the slurry on a 50 micron thick The area is 2.5cm*2.5cm on several stainless steel foils, and finally put the smeared sheet in a vacuum drying oven, and dry it at 80°C for 12 hours to obtain a working electrode sheet. Dissolve 1.96g of ammonium bromide in 10ml of ethylene glycol to prepare a 2mol / L electrolyte. Use 50 micron thick nickel foil as the negative electrode material of the bromide ion battery, and assemble it into a pouch battery for performance testing, as shown in the attached image 3 As shown, under the charge and discharge current density of 2A / g, the bromide ion battery has a capacity of 85mAh / g after 500 cycles.

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Abstract

The invention provides a bromide ion battery, which belongs to the field of batteries. The battery uses carbon black as the intercalation material of bromide ions, uses ammonium bromide with a concentration of 1-2mol / L in ethylene glycol non-aqueous system as the electrolyte, and uses three coordination metals of zinc, copper or nickel as bromide ions. The negative electrode material of the battery is assembled into a soft pack battery. The invention proposes a bromide ion battery based on the intercalation principle of bromide ions in carbon materials. The bromide ions avoid the disadvantages of toxicity and volatility of elemental bromine, and improve the safety of the battery. At the same time, the low price of carbon black reduces the cost of bromide-ion batteries and is conducive to large-scale promotion. The ethylene glycol ammonium bromide electrolyte in the non-aqueous system avoids the hydrogen evolution and oxygen evolution reaction, thereby making the cycle of the bromide ion battery stable, and giving full play to the characteristics of the high theoretical specific capacity of the bromide ion. Three metals, zinc, copper and nickel, are used as anode materials for bromide-ion batteries, which not only reduces the cost of batteries, but also provides a theoretical basis for the research on anodes of non-metal ion batteries.

Description

technical field [0001] The invention relates to the battery field and provides a novel bromide ion battery. Background technique [0002] In recent years, due to the need for large-scale energy storage and the safety and cost of the electrolyte of commercial lithium batteries, the search for new ion batteries has become more and more urgent. Bromine due to higher theoretical specific capacity (335mAh / g Br2 ) are widely used in batteries, such as lithium-bromine, magnesium-bromine batteries and zinc-bromine flow batteries [Yao, X.H., Luo, J.R., Dong, Q. & Wang, D.W. Arechargeable non-aqueous Mg-Br-2battery. Nano Energy 28,440- 446, doi: 10.1016 / j.nanoen.2016.09.003(2016).; Chang, Z. et al. Rechargeable Li / / Br battery: apromising platform for post lithium ion batteries. J Mater Chem A 2, 19444-19450, doi:10.1039 / c4ta04419c(2014).; Lai,Q.Z.,Zhang,H.M.,Li,X.F.,Zhang,L.Q.&Cheng,Y.H.A novel single flow zinc-bromine battery with improved energydensity.J Power Sources 235,1-4,doi:...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/133H01M4/134H01M4/38H01M4/42H01M4/587H01M10/05H01M10/0568H01M10/0569
CPCH01M4/133H01M4/134H01M4/587H01M4/42H01M4/38H01M10/0568H01M10/0569H01M10/05H01M2004/027H01M2004/028Y02E60/10
Inventor 李明强李航
Owner DALIAN UNIV OF TECH