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Flexible nanoporous metal/oxide supercapacitor electrode material and preparation method thereof

A supercapacitor and nanoporous technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, can solve problems such as unfavorable practical applications and many steps, and achieve improved electrochemical performance, increased transportability, and preparation methods. simple effect

Active Publication Date: 2018-09-04
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional method of preparing hierarchical pores has many steps, which is not conducive to practical application

Method used

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  • Flexible nanoporous metal/oxide supercapacitor electrode material and preparation method thereof
  • Flexible nanoporous metal/oxide supercapacitor electrode material and preparation method thereof
  • Flexible nanoporous metal/oxide supercapacitor electrode material and preparation method thereof

Examples

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Embodiment 1

[0079] Embodiment 1: a kind of preparation method of flexible nanoporous metal / oxide supercapacitor electrode material, comprises the following steps:

[0080] (1) Select Al, Ni, Co, Y, Cu elements with a purity greater than 99.9%, according to Al 82 Ni 6 co 3 Y 6 Cu 3 (atomic percent) for proportioning, the alloy elements of the above proportioning are arc-melted in an Ar protective atmosphere.

[0081] (2) Remelt the master alloy in a quartz tube, spray it on a copper roller with a line speed of 40m / s and throw it into an amorphous strip, the thickness of the strip is 20-30μm, the width is 1-2mm, and the length is ten a few meters.

[0082] The amorphous strips are wound into different radii of curvature, indicating that the amorphous alloy has good flexibility; the XRD patterns of the strips are as follows figure 1 As shown, there is only one diffuse scattering peak, indicating that it is completely amorphous; the DSC curve of the strip is as follows figure 2 Shown,...

Embodiment 2

[0094] Embodiment 2: a kind of preparation method of flexible nanoporous metal / oxide supercapacitor electrode material, comprises the following steps:

[0095] Step (1) and (2) are with embodiment 1;

[0096] (3) Put the amorphous strip at 257°C and the degree of vacuum is 5×10- 3 Annealed for 10min under the condition of pa. The XRD pattern of the strip after annealing is as follows image 3 As shown in curve (b) in , various nanocrystalline phases are formed.

[0097] (4) The strips after annealing were put into 4mol / L KOH solution, dealloyed at room temperature for 10min, and washed repeatedly with deionized water and absolute ethanol to prepare the working electrode. The XRD pattern of the strip after dealloying is as follows Figure 4 As shown in the curve (b), the nanocrystalline phase formed by annealing is dissolved, and (Ni, Co, Cu)O, (Ni, Co)OOH, Y 2 o 3 And trace amounts of Al nanocrystals and Al(OH) 3 Precipitation, these oxides / hydroxides play an important ...

Embodiment 3

[0103] Embodiment 3: a kind of preparation method of flexible nanoporous metal / oxide supercapacitor electrode material, comprises the following steps:

[0104] Step (1) and (2) are with embodiment 1;

[0105] (3) Put the amorphous strip at 312°C with a vacuum of 5×10 -3 Annealed under Pa conditions for 10min. The XRD pattern of the strip after annealing is as follows image 3 As shown in curve (c) in , various nanocrystalline phases are formed.

[0106] (4) The strips after annealing were put into 4mol / L KOH solution, dealloyed at room temperature for 10min, and washed repeatedly with deionized water and absolute ethanol to prepare the working electrode. The XRD pattern of the strip after dealloying is as follows Figure 4 As shown in the curve (c), the nanocrystalline phase formed by annealing is dissolved, and (Ni, Co, Cu) O, (Ni, Co) OOH, Y 2 o 3 And trace amounts of Al nanocrystals and Al(OH) 3 Precipitation, these oxides / hydroxides play an important role in the use...

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Abstract

The invention discloses a flexible nanoporous metal / oxide supercapacitor electrode material and a preparation method thereof. The preparation method comprises the following steps of (1) preparing an AxNiyCozY100-x-y-z-m-nCumMn flexible amorphous alloy material, wherein A is Al, Fe, Zn or Mg, M is at least one of Ce, Mn, Au and Pt, x = 75 to 90, y = 0 to 10, z = 0 to 10, m = 0 to 10, n=0 to 10, y and z are not 0 at the same time, 100-x-y-z-m-n is larger than 0, and x, y, z, m and n are atomic percentages of corresponding atoms, (2) carrying out heat processing on the amorphous alloy material toobtain a nanocrystalline alloy material under a vacuum condition, and (3) carrying out de-alloying processing on the nanocrystalline alloy material by using an alkaline or acidic solution to obtain the flexible nanoporous metal / oxide supercapacitor electrode material. The preparation method is simple in operation, and the prepared electrode material has excellent electrochemical performance.

Description

technical field [0001] The invention relates to the technical fields of amorphous, electrochemical, nanometer and functional materials, in particular to a flexible nanoporous metal / oxide supercapacitor electrode material and a preparation method thereof. Background technique [0002] Supercapacitors have some advantages such as high power density and fast charging and discharging speed, and have become a relatively popular research topic in recent years. According to the energy storage mechanism, supercapacitors can be divided into two categories: electric double layer capacitors and pseudocapacitors. The energy storage of electric double layer capacitors is realized by the rapid adsorption-desorption of ions on the electrode surface. The energy storage mechanism of a pseudocapacitor is very similar to that of a secondary battery, in that a reversible faradaic (redox) reaction occurs at the electrode / electrolyte interface to store charge. Transition metal oxides (eg: NiO, ...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/46H01G11/86
CPCH01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 姚阿艳王军强霍军涛许巍李润伟
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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