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peo-coated hollow sn-ni alloy nanowire array, its preparation method and its application

A technology of alloy nano and wire arrays, which is applied in the field of nano materials and its applications, can solve the problems of poor stability and achieve the effect of mild and controllable conditions, good cycle stability and neat arrangement

Active Publication Date: 2017-02-15
SHANDONG YUHUANG NEW ENERGY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of poor stability of three-dimensional nanowires in the prior art as lithium battery anode materials, the present invention provides a PEO-coated hollow Sn-Ni alloy nanowire array, its preparation method and its application

Method used

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  • peo-coated hollow sn-ni alloy nanowire array, its preparation method and its application
  • peo-coated hollow sn-ni alloy nanowire array, its preparation method and its application
  • peo-coated hollow sn-ni alloy nanowire array, its preparation method and its application

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Embodiment 1

[0027] The preparation method of the PEO-coated Sn-Ni alloy nanowire array of the present invention comprises the following steps:

[0028] 1) Preparation of Ni nanowire arrays by constant current electrodeposition

[0029] a. Treatment of Porous Anodized Aluminum Oxide Template (AAO)

[0030] Cut a copper foil with a diameter of 20 mm and a thickness of 15 μm, and ultrasonically clean it in 1 mol / L dilute hydrochloric acid solution and acetone for 5 min to remove oxides and oil on the surface, and then clean it with deionized water and alcohol Wash them 3-5 times respectively, and dry them under vacuum at 90°C for 4 hours.

[0031] Spray gold on one side of the porous anodized aluminum template, cover the gold-sprayed surface with conductive silver adhesive on the above-mentioned treated copper foil, and seal the part except the AAO template with silica gel to prevent the copper foil from being exposed. After the silica gel solidifies , dried under vacuum at 80°C for 4h.

...

Embodiment 2

[0040]The preparation method of the PEO-coated Sn-Ni alloy nanowire array of the present invention comprises the following steps:

[0041] Step 1) and step 3) are the same as in Example 1.

[0042] Step 2) Preparation of hollow Sn-Ni alloy nanowire arrays by current displacement method

[0043] Put the expanded Ni nanowires into 0.1 M SnSO 4 Soak in the solution for 10 days, take it out, wash it with deionized water and alcohol for 3-5 times, and then dry it in a vacuum oven at 100°C for 8 hours to obtain a hollow Sn-Ni alloy nanowire array.

[0044] The array height of the PEO-coated hollow Sn-Ni alloy nanowire array obtained in this example is 8-10um, the distance between two adjacent nanowires is 60-65nm, and the cavity diameter of the hollow Sn-Ni alloy nanowire is 262- 265nm, the thickness of the PEO cladding layer is 15-20nm.

Embodiment 3

[0046] The preparation method of the PEO-coated Sn-Ni alloy nanowire array of the present invention comprises the following steps:

[0047] Step 1) and step 3) are the same as in Example 1.

[0048] Step 2) Preparation of hollow Sn-Ni alloy nanowire arrays by current displacement method

[0049] Put the expanded Ni nanowires into 0.1 M SnSO 4 Soak in the solution for 15 days, take it out, wash it with deionized water and alcohol for 3-5 times, and then dry it in a vacuum oven at 100°C for 8 hours to obtain a hollow Sn-Ni alloy nanowire array. The product obtained in this embodiment is analyzed by transmission electron microscope, and the results are as follows: figure 2 as shown in a.

[0050] The array height of the PEO-coated hollow Sn-Ni alloy nanowire array obtained in this example is 8-10um, the distance between two adjacent nanowires is 60-65nm, and the cavity diameter of the hollow Sn-Ni alloy nanowire is 265- 270nm, the thickness of the PEO cladding layer is 15-20...

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Abstract

The invention discloses a PEO-coated hollow Sn-Ni alloy nanowire array, its preparation method and its application in lithium battery negative electrode materials, which solves the problem of poor stability of existing existing three-dimensional structure nanowires as lithium battery negative electrode materials The present invention includes steps: 1) preparing Ni nanowires by constant current electrodeposition; 2) using Ni nanowires as a template to prepare hollow Sn-Ni alloy nanowire arrays through current displacement reaction; 3) preparing by PEO solution infiltration method PEO-coated hollow Sn‑Ni alloy nanowire arrays. The prepared PEO-coated hollow Sn‑Ni alloy nanowire array was used as the negative electrode, and the lithium-ion battery was assembled and tested for performance. The reversible specific capacity of the PEO-coated hollow Sn‑Ni alloy nanowire array remained at 0.88 mAhcm‑after 200 cycles. 2. This is mainly due to the flexibility of the polymer and the buffering effect of its internal hollow structure on volume expansion.

Description

technical field [0001] The invention relates to the technical field of nanomaterials and their applications, in particular to a PEO-coated hollow Sn-Ni alloy nanowire array, its preparation method and its application. Background technique [0002] The traditional two-dimensional thin-film lithium-ion battery has short lithium ion diffusion path, high specific capacity, excellent electrochemical performance and safety performance, but the battery volume energy density is low. Compared with it, the three-dimensional electrode structure can make full use of the advantages of three-dimensional space. The active material of this micro-nano structure electrode forms columnar, sheet-like and other microstructures at the micron or even nanometer scale, which increases the microscopic surface area of ​​the active material, thereby The utilization rate of the active material and the overall performance of the battery are improved, and the capacity of the battery is increased. Three-d...

Claims

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Application Information

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IPC IPC(8): H01M4/134H01M4/1395B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/134H01M4/1395H01M4/366H01M4/387H01M2004/021Y02E60/10
Inventor 石永倩唐其伟刘军赵成龙
Owner SHANDONG YUHUANG NEW ENERGY TECH
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