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Bismuth oxyhalide aqueous zinc ion secondary battery positive electrode and preparation method and application thereof

A bismuth oxyhalide, secondary battery technology, applied in the direction of secondary batteries, electrode manufacturing, battery electrodes, etc., can solve the problems of capacity attenuation, hindering development, low capacity, etc., and achieve rapid charge and discharge, low cost, and wide sources Effect

Active Publication Date: 2019-11-05
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of material is the most mature and widely used in zinc-ion batteries, but there are still problems of capacity fading and low power; (2) Prussian blue analogues
Due to the open framework structure of this type of material, it shows good cycle performance, however, a rather low capacity (≈50mAh g -1 ) greatly hindered their further development; (3) other cathode materials, such as layered Zn 0.25 V 2 o 5 ·nH 2 O and VS 2 , Na of the NASICON structure 3 V 2 (PO 4 ) 3 , Chef Frey 6 S 8 and Na 2 V 6 o 16 1.63H 2 O etc.

Method used

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  • Bismuth oxyhalide aqueous zinc ion secondary battery positive electrode and preparation method and application thereof
  • Bismuth oxyhalide aqueous zinc ion secondary battery positive electrode and preparation method and application thereof
  • Bismuth oxyhalide aqueous zinc ion secondary battery positive electrode and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of preparation method of BiOCl aqueous zinc ion secondary battery cathode and battery thereof, comprises the following steps:

[0042] Step 1: Add 0.05g of PVDF (polyvinylidene fluoride) into a volumetric flask containing 1.2mL of NMP (N-methylpyrrolidone) at room temperature, and stir until completely dissolved to obtain a stirred liquid.

[0043] Step 2, mix 0.3g BiOCl (bismuth oxychloride) and 0.15g Super-P (conductive carbon black) uniformly, add to the stirring liquid, stir for 3 hours to mix uniformly to obtain a mixed slurry.

[0044] Step 3: Coating the mixed slurry on a steel sheet, placing it in a temperature-programmed oven and drying it under vacuum at 100° C. for 10 hours to obtain the positive electrode of the BiOCl water-based zinc-ion secondary battery.

[0045] Step 4, using BiOCl as the positive electrode active material, the negative electrode material is a zinc negative electrode made of metal zinc sheet, the electrolyte uses 2mol / L zinc sulfa...

Embodiment 2

[0047] A kind of preparation method of BiOCl aqueous zinc ion secondary battery cathode and battery thereof, comprises the following steps:

[0048] Step 1: Add 0.05g of PVDF (polyvinylidene fluoride) into a volumetric flask containing 1.2mL of NMP (N-methylpyrrolidone) at room temperature, and stir until completely dissolved to obtain a stirred liquid.

[0049] Step 2, mix 0.4g BiOCl and 0.05g Super-P (conductive carbon black) evenly, add to the stirring liquid, stir for 3h to mix evenly, and obtain a mixed slurry.

[0050] Step 3: Coating the mixed slurry on a steel sheet, placing it in a temperature-programmed oven and drying it under vacuum at 100° C. for 10 hours to obtain the positive electrode of the BiOCl water-based zinc-ion secondary battery.

[0051] Step 4, using BiOCl as the positive electrode active material, the negative electrode material is a zinc negative electrode made of metal zinc sheet, the electrolyte uses 2mol / L zinc sulfate as the solute, water as the ...

Embodiment 3

[0053] A kind of preparation method of BiOCl aqueous zinc ion secondary battery cathode and battery thereof, comprises the following steps:

[0054] Step 1: Add 0.05g of PVDF (polyvinylidene fluoride) into a volumetric flask containing 1.2mL of NMP (N-methylpyrrolidone) at room temperature, and stir until completely dissolved to obtain a stirred liquid.

[0055] Step 2, mix 0.35g BiOCl and 0.1g Super-P (conductive carbon black) uniformly, add to the stirring liquid, stir for 3h to mix uniformly, and obtain a mixed slurry.

[0056] Step 3: Coating the mixed slurry on a steel sheet, placing it in a temperature-programmed oven and drying it under vacuum at 100° C. for 10 hours to obtain the positive electrode of the BiOCl water-based zinc-ion secondary battery.

[0057] Step 4, using BiOCl as the positive electrode active material, the negative electrode material is a zinc negative electrode made of metal zinc sheet, the electrolyte uses 2mol / L zinc sulfate as the solute, water a...

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Abstract

The invention discloses a bismuth oxyhalide aqueous zinc ion secondary battery positive electrode and a preparation method and application thereof. The battery positive electrode comprises bismuth oxyhalide, a conductive agent, a binder, an N-Methylpyrrolidone and a current collector. The bismuth oxyhalide aqueous zinc ion secondary battery positive electrode takes bismuth oxyhalide (BiOX, X=Cl, Br, I) with the layered structure and its conductive compound as the positive electrode active material, and the raw material is easy to obtain, low in cost, toxic-free and harmless and economical andenvironment-friendly; and the positive electrode active material is utilized with the diaphragm, the zinc ion aqueous solution or the gel electrolyte and the active material acting as the negative electrode of zinc metal to prepare an aqueous neutral zinc ion battery system including the positive electrode-diaphragm-electrolyte-negative electrode, and the obtained battery has the characteristics of environmental protection, non-toxic and excellent cycle performance.

Description

technical field [0001] The invention relates to the field of neutral water-based zinc-ion batteries, in particular to a positive electrode of a bismuth oxyhalide water-based zinc-ion secondary battery and a preparation method and application thereof. Background technique [0002] At present, with the rapid development of the world economy, countries have increasingly higher requirements for energy. Today, oil and coal are still the main energy carriers for human beings. However, oil and coal resources are becoming increasingly scarce, and a large amount of greenhouse gases and harmful gases will be released in the process of providing energy, causing environmental problems such as climate warming and acid rain. . Secondly, oil and coal are non-renewable resources, which are contrary to the strategic proposition of sustainable development. Therefore, the development of new energy conversion and energy storage materials and devices is the main measure to deal with energy cri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/04H01M10/36
CPCH01M4/48H01M4/0404H01M10/36Y02E60/10
Inventor 苟蕾赵少攀王文燕张云飞樊小勇李东林
Owner CHANGAN UNIV