Rechargeable aqueous zinc ion battery

A zinc-ion battery, ionic conductivity technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of limited development space, long charging time, short cycle life, etc., and achieve broad application prospects, short operating cycles, The effect of high rate capability

Active Publication Date: 2017-09-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low energy density, long charging time and short cycle life of Zn-ion batteries limit their development space

Method used

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  • Rechargeable aqueous zinc ion battery
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  • Rechargeable aqueous zinc ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A rechargeable zinc-ion battery with long life and high energy density, the positive active material is Na 0.33 V 2 o 5 Nanowire material (XRD is figure 1 ), the negative electrode is made of zinc sheet, the diaphragm is made of glass fiber diaphragm, and the electrolyte is 3mol / L zinc trifluoromethanesulfonate. Its preparation method comprises the following steps:

[0023] (1)Na 0.33 V 2 o 5 Preparation of positive electrode sheet

[0024] The binder polyvinylidene fluoride (PVDF) or polytetrafluoroethylene (PTFE) is dissolved in N-methylpyrrolidone (NMP) to obtain a clear solution, and a certain amount of Na 0.33 V 2 o 5 After the nanowire positive electrode material is ground evenly, add it to the above solution (according to active substance: acetylene black: binder = 7:2:1), carry out ultrasonic dispersion, prepare a slurry, and evenly coat it on the titanium with a thickness of 0.05mm. On the foil, the thickness of the coating layer is 150 μm, and the po...

Embodiment 2

[0033] A rechargeable zinc-ion battery with long life and high energy density, the positive active material is Li 0.33 V 2 o 5 Nanowire material, the negative electrode is made of zinc sheet, the diaphragm is made of glass fiber diaphragm, and the electrolyte is 3mol / L zinc sulfate. The preparation method comprises the following steps:

[0034] (1) Li 0.33 V 2 o 5 Preparation of positive electrode sheet

[0035]The binder polyvinylidene fluoride (PVDF) or polytetrafluoroethylene (PTFE) was dissolved in N-methylpyrrolidone (NMP) to obtain a clear solution, and a certain amount of Li 0.33 V 2 o 5 After the material is ground evenly, add it to the above solution (according to active substance: acetylene black: binder = 7:2:1), carry out ultrasonic dispersion, prepare a slurry, and evenly coat it on a titanium foil with a thickness of 0.05mm. The thickness of the coating layer was 150 μm, and the positive electrode sheet was obtained by vacuum drying.

[0036] (2) Prepar...

Embodiment 3

[0044] A rechargeable zinc-ion battery with long life and high energy density, the positive active material is Na 0.33 V 2 o 5 Nanowire material, the negative electrode is made of zinc sheet, the diaphragm is made of glass fiber diaphragm, and the electrolyte is 3mol / L zinc sulfate. The preparation method comprises the following steps:

[0045] (1)Na 0.33 V 2 o 5 Preparation of positive electrode sheet

[0046] The binder polyvinylidene fluoride (PVDF) or polytetrafluoroethylene (PTFE) is dissolved in N-methylpyrrolidone (NMP) to obtain a clear solution, and a certain amount of Na 0.33 V 2 o 5 After the material is ground evenly, add it to the above solution (according to active substance: acetylene black: binder = 7:2:1), carry out ultrasonic dispersion, prepare a slurry, and evenly coat it on a titanium foil with a thickness of 0.05mm. The thickness of the coating layer was 150 μm, and the positive electrode sheet was obtained by vacuum drying.

[0047] (2) Prepara...

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Abstract

The invention belongs to the field of a novel chemical power supply and a new energy material, and particularly relates to a novel rechargeable aqueous zinc ion battery taking a vanadate salt as an electrode active material. The rechargeable aqueous zinc ion battery comprises a positive electrode, a negative electrode, a separator and an electrolyte, wherein the separator is arranged between the positive electrode and the negative electrode, the electrolyte contains negative ions and positive ions and has ion conductivity, an active material of the positive electrode takes the vanadate salt to which zinc ions are intercalated/de-intercalated as main, the electrolyte takes a zinc soluble salt as a solute and water as a solvent, the concentration of the electrolyte is (0.1-5)mol/L, and the electrolyte is a liquid-state or gel-state material with ion conductivity. The material shows excellent high-rate performance, cycle stability and long lifetime when assembled to form the aqueous zinc ion battery, is a potential application material of the high-power and long-lifetime zinc ion battery and has a wide application prospect in an aspect of energy storage on a large scale.

Description

technical field [0001] The invention belongs to the field of novel chemical power sources and new energy materials, and in particular relates to a novel rechargeable water-based zinc ion battery using vanadate as an electrode active material. Background technique [0002] The development and utilization of green and clean energy is of great significance to solving the energy crisis facing the current human society. New energy sources such as solar energy and wind energy are gradually accepted and promoted by the world due to their renewable and non-polluting advantages. However, after these energies are converted into electric energy, efficient and recyclable electric energy storage devices must be required to meet consumers' requirements for portable electronic appliances. In this context, the development of batteries has received much attention. Primary batteries, such as nickel-cadmium batteries, nickel-metal hydride batteries, and lead-acid batteries, have limited thei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/38H01M4/485H01M4/42
CPCH01M4/42H01M4/485H01M10/38H01M2300/0002Y02E60/10Y02P70/50
Inventor 麦立强何攀张国彬陈丽能
Owner WUHAN UNIV OF TECH
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