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Indium oxide-coated secondary aqueous neutral zinc ion battery positive electrode material and preparation method and application thereof

A technology of zinc ion battery and cathode material, applied in secondary batteries, battery electrodes, active material electrodes, etc., can solve the problems of poor electrical conductivity, low battery cycle and rate performance, etc., to improve rate performance and cycle stability. , the effect of good electronic conductivity

Active Publication Date: 2019-04-12
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, all kinds of zinc-ion battery cathode materials have the common problem of poor electrical conductivity, resulting in low battery cycle and rate performance, which has become one of the bottlenecks restricting the popularization and application of zinc-ion batteries.

Method used

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  • Indium oxide-coated secondary aqueous neutral zinc ion battery positive electrode material and preparation method and application thereof
  • Indium oxide-coated secondary aqueous neutral zinc ion battery positive electrode material and preparation method and application thereof
  • Indium oxide-coated secondary aqueous neutral zinc ion battery positive electrode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of indium oxide coated MnO 2 The preparation method of the water system zinc ion battery cathode material of nanorods comprises the following preparation steps:

[0039] Step 1, 0.7112g potassium permanganate (KMnO 4 ) was added to 70 mL of deionized water, and 3 mL of concentrated hydrochloric acid was added dropwise while stirring, and stirred for 30 min to obtain a mixed solution.

[0040] Step 2, transfer the mixed solution to a 100mL autoclave lined with polytetrafluoroethylene, conduct a hydrothermal reaction at 140°C for 16h, centrifuge, and wash with deionized water several times until no acidity is detected, then in Dry in a blast oven at 70°C for 12 hours and grind to obtain MnO 2 Nanorod precursors.

[0041] Step 3, take 0.4gMnO 2 The nanorod precursor was added into 55 mL of deionized water, and ultrasonically dispersed at 35° C. for 35 min to obtain a dispersion liquid of the positive electrode material of the zinc ion battery.

[0042] Step 4, ...

Embodiment 2

[0044] A kind of α-MnO coated with indium oxide 2 The preparation method of the water-based zinc ion battery cathode material of nanotubes comprises the following preparation steps:

[0045]Step 1, 0.395g potassium permanganate (KMnO 4 ) was added to 45 mL of deionized water, and 1 mL of concentrated hydrochloric acid was added dropwise while stirring, and stirred for 30 min to obtain a mixed solution.

[0046] Step 2, transfer the mixed solution to a 65mL autoclave lined with polytetrafluoroethylene, conduct a hydrothermal reaction at 140°C for 12h, centrifuge, and wash with deionized water several times until no acidity is detected, then in Dry in a blast drying oven at 70°C for 12 hours and grind to obtain α-MnO 2 Nanotube precursors.

[0047] Step 3, take 0.4g α-MnO 2 The nanotube precursor was added into 55 mL of deionized water, and ultrasonically dispersed at 20° C. for 60 min to obtain a zinc-ion battery cathode material dispersion.

[0048] Step 4, add 0.012g ind...

Embodiment 3

[0050] A kind of indium oxide coated β-MnO 2 The preparation method of the water system zinc ion battery cathode material of nanorods comprises the following preparation steps:

[0051] Step 1, 0.158g KMnO 4 and 0.253g MnSO 4 Add 15mL of deionized water, transfer to a 20mL small glass bottle, put it in a microwave oven for hydrothermal reaction, keep it at 200°C for 10 minutes, filter, wash with deionized water several times, and then dry it in a blast drying oven at 80 Dry at ℃ for 12h and grind to get β-MnO 2 Nanorod precursors.

[0052] Step 2, take 0.2g β-MnO 2 The nanorod precursor was added into 55 mL of deionized water, and ultrasonically dispersed at 50° C. for 10 min to obtain a zinc-ion battery cathode material dispersion.

[0053] Step 3, add 0.01g indium chloride (InCl 3 4H 2 O) and 0.23g polyvinylpyrrolidone (K-30), magnetically stirred for 2h, hydrothermally reacted at 160°C for 5h, centrifuged at 7000rpm for 15min, dried at 60°C for 11h, ground, and dried...

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Abstract

The invention discloses an indium oxide-coated secondary aqueous neutral zinc ion battery positive electrode material and preparation method and application thereof. The indium oxide-coated secondaryaqueous neutral zinc ion battery positive electrode material comprises a zinc ion battery positive electrode material and an indium oxide-coated material, wherein the indium oxide-coated material is coated on a surface of the zinc ion battery positive electrode material and comprises an indium salt and polyvinylpyrrolidone. The indium oxide is coated on the surface of the zinc ion battery positiveelectrode material, a compact and uniform coating layer is formed on a surface of an active material, the contact between the positive electrode and an electrolyte is reduced, the reaction of the electrolyte and the electrode active material is suppressed, and the interface resistance of the electrolyte and the electrode material is reduced; the indium oxide-coated secondary aqueous neutral zincion battery positive electrode material has favorable electronic conductivity and is good in cycle stability and high in rate performance; and the preparation method is simple and is applicable to a zinc ion battery positive electrode and a zinc ion battery.

Description

[0001] The invention relates to the field of aqueous zinc-ion secondary batteries, in particular to an indium oxide-coated secondary aqueous neutral zinc-ion battery positive electrode material and a preparation method and application thereof. Background technique [0002] In recent years, rechargeable multivalent cation (Al-, Mg-, Ca-, and Zn-) batteries have attracted extensive attention due to the increasing demand for large-scale, high-capacity energy storage devices. Among the polyvalent cation batteries, the rechargeable aqueous Zn-ion battery, due to the low redox potential of Zn (-0.76 V vs. standard hydrogen potential), can simultaneously achieve low-cost fabrication and safe use of the battery. Meanwhile, aqueous electrolytes usually exhibit greater than 1.0Scm -1 The high ionic conductivity (usually three orders of magnitude higher than that of organic electrolytes) makes aqueous Zn-ion batteries have potentially excellent rate performance, shows good application pr...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/50H01M4/62H01M10/36H01M4/02
CPCH01M4/02H01M4/366H01M4/50H01M4/626H01M4/628H01M10/36H01M2004/028Y02E60/10
Inventor 苟蕾薛栋牟克亮赵明娟赵少攀樊小勇李东林
Owner CHANGAN UNIV
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