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A kind of electrode material of multilevel nanocomposite structure and preparation method thereof

A nanocomposite and electrode material technology, applied in electrolytic inorganic material coating, nanotechnology, nanotechnology, etc., can solve problems such as hindering electron and electrolyte transfer, electron transmission channel limitation, weak conductivity, etc., to accelerate electron transfer rate, Ease of large-scale preparation and low-cost preparation

Active Publication Date: 2020-12-29
安庆北化大科技园有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The patent application number is CN201310449521.0, which discloses the preparation method of cobalt hydroxide / bismuth sulfide composite nanowire supercapacitor electrode material, and successfully prepared Co(OH) 2 The multi-level composite structure of nanosheets / BiS nanowires, but these two nanowires are sulfides, and their electrical conductivity is 10-12 orders of magnitude lower than that of metallic Cu. After loading cobalt hydroxide on the surface of sulfides, the conductivity It will become weaker; the patent application number is CN201510813390.9, which discloses a hollow tubular structure electrode material and its preparation method, which adopts the method of solution impregnation and constant potential electrodeposition to grow hydrogen in situ on the copper-containing metal substrate Cobalt oxide / copper hydroxide nanowire array structure, but the nanowire is copper hydroxide, and its conductivity is much smaller than that of metallic copper; the patent application number is CN201410073776.6, which discloses a Cu-based nanometer with a core-shell structure composited with Ni and Co. wire and its preparation method, the suspension containing the core-shell structure Cu nanowires of composite Ni and Co is obtained by chemical reaction between the solutions, and then centrifuged and vacuum-dried to obtain the core-shell structure Cu-based nanowires of composite Ni and Co, but The catalyst synthesized by this method needs to be mixed with a binder (such as nafion, PTFE, PVDF) and drip-coated on the electrode. Most of the binders are organic and have poor conductivity, which hinders the transfer of electrons and electrolytes.
[0004] The patent application number is CN201610837753.7, which discloses a preparation method of multi-dimensional copper nanowire material, and Cu nanowires are prepared by thermal oxidation and electrochemical reduction; the patent application number is CN201710337066.3, an activated carbon / cobalt hydroxide composite Preparation method of electrode material, Co(OH) loaded on activated carbon by electrodeposition 2 Nanosheets, these two patents loaded Cu nanowires and Co(OH) on conductive substrates respectively 2 Nanosheets, but all are first-order nanostructures, which have low specific surface area and limited electron transport channels limit their applications

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  • A kind of electrode material of multilevel nanocomposite structure and preparation method thereof
  • A kind of electrode material of multilevel nanocomposite structure and preparation method thereof
  • A kind of electrode material of multilevel nanocomposite structure and preparation method thereof

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Embodiment 1

[0048] Such as figure 1 As shown, the electrode material is loaded with Cu nanowires on the conductive substrate, and Co(OH) is deposited on the Cu nanowires. 2 Nanosheets.

Embodiment 2

[0050] figure 2 The preparation flowchart for preparing the electrode material of the multi-level nanocomposite structure specifically includes the following preparation steps:

[0051] (1) The nickel foam with a porosity of 97% is used as the conductive substrate, and the lug is cut into 0.5×0.5cm 2 , the working area is 1.0×1.0cm 2 For tablets of different sizes, soak them in acetone for 20 minutes and take them out, rinse them with deionized water, soak them in deionized water for 10 minutes and take them out, then dry them in an oven at 70°C for later use;

[0052] (2) configuration concentration is the mixed solution of 0.5mol / L cupric sulfate and 1mol / L sulfuric acid, feeds high-purity argon gas 30min to remove dissolved oxygen in the mixed solution, uses this solution as electrolyte, obtains with step (1) Nickel foam is used as a working cathode, a double titanium ruthenium electrode is used as an auxiliary anode, and saturated calomel is used as a reference electrod...

Embodiment 3

[0067] The difference between this embodiment and embodiment 2 is:

[0068] Step (5): Prepare a mixed solution of cobalt nitrate with a concentration of 0.10 mol / L and nickel nitrate with a concentration of 0.05 mol / L, pass high-purity argon gas into the mixed solution for 30 minutes to remove dissolved oxygen, and use the solution as an electrolyte. The Cu nanowire / nickel foam obtained in step D is used as the working cathode, the double titanium ruthenium is used as the auxiliary anode, and the saturated calomel is used as the reference electrode. Under the condition of constant voltage -1.0V, electrodeposition was performed for 100s to obtain a multi-level composite nanomaterial of composite nickel-cobalt hydroxide nanosheet / Cu nanowire / nickel foam.

[0069] Experimental results:

[0070] Figure 11 For the scanning electron microscope (SEM) characterization of the composite nickel-cobalt hydroxide nanosheet / Cu nanowire / nickel foam that step (5) makes in the present embod...

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Abstract

The invention discloses an electrode material with a multi-level nano-composite structure and a preparation method thereof, relates to the technical field of inorganic advanced nano-materials, and is proposed based on the problems of low specific surface area and weak conductivity of electrode materials prepared in the prior art. The present invention The electrode material of the multi-level nanocomposite structure is to support Cu nanowires on the conductive substrate, and deposit Co(OH) on the Cu nanowires. 2 The multi-level nanocomposite structure of nanosheets, the beneficial effect of the present invention is that the electrode material has the advantages of high specific surface area, high capacity, high electrochemical activity and good cycle stability, and can be used in many electrocatalytic fields.

Description

technical field [0001] The invention relates to the technical field of inorganic advanced nanometer materials, in particular to an electrode material with a multilevel nanocomposite structure and a preparation method thereof. Background technique [0002] At present, inorganic functional nanomaterials have been extensively studied due to their unique structures, among which one-dimensional nano-core-shell structures have been reported frequently, but their small specific surface area and few active sites limit their applications. The multi-level nanocomposite structure with high specific surface area and multiple electron transport channels has been intensively studied. [0003] The patent application number is CN201310449521.0, which discloses the preparation method of cobalt hydroxide / bismuth sulfide composite nanowire supercapacitor electrode material, and successfully prepared Co(OH) 2 The multi-level composite structure of nanosheets / BiS nanowires, but these two nanowi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/38C25D5/48C25D9/08B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C25D3/38C25D5/48C25D9/08
Inventor 万平玉王力南汪杰唐阳谢鳌徐李栋庄姝娴
Owner 安庆北化大科技园有限公司