Silylene-copper-silylene composite material, preparation method and application thereof and lithium ion battery

A composite material and silicene technology, which is applied in secondary batteries, battery electrodes, circuits, etc., can solve the problems of complex preparation methods and uneven silicene sheets, and achieve low cost, low energy consumption, and large-scale preparation Effect

Inactive Publication Date: 2019-12-20
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] The technical problem to be solved by the present invention is to overcome the complex preparation method of silicene materials in the prior art, and the uneven defects of the prepared silicene sheets are easy to appear, and provide a silicene-copper-silicene composite material, Preparation method, application, lithium ion battery

Method used

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  • Silylene-copper-silylene composite material, preparation method and application thereof and lithium ion battery
  • Silylene-copper-silylene composite material, preparation method and application thereof and lithium ion battery
  • Silylene-copper-silylene composite material, preparation method and application thereof and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] (1) Preparation of ionic liquid: preparation of 0.002mol / L Cu(TFO) 2 -1mol / L SiCl 4 [BMP]Tf 2 N solution, stir well until the solution is evenly dispersed.

[0105] (2) Electrode treatment: firstly, the electrode is ground and polished to a mirror image with metallographic sandpaper from coarse to fine, and then ultrasonically cleaned with deionized water. After that, the platinum electrode was pickled with 2mol / L nitric acid, the Cu electrode was pickled with 2mol / L sulfuric acid, rinsed with deionized water, and then dried in a vacuum oven. Finally, all electrodes were cleaned with acetone and allowed to air dry.

[0106] (3) Preparation of electrolyzer: The electrolyzer used in the experiment is a three-electrode system. Wherein, the three electrodes refer to a working electrode, a reference electrode and a counter electrode. The distance between the electrodes was kept constant in each experiment (the distance between the working electrode and the reference ele...

Embodiment 2

[0121] (1) Configuration of ionic liquid: configure 1mol / L SiCl 4 [BMP]Tf 2 N solution, add 0.002mol / L Cu(TFO) 2 Stir well to obtain a homogeneously dispersed yellow solution.

[0122] (2) Electrode treatment: First, the electrode is ground and polished to a mirror image with metallographic sandpaper from coarse to fine, and then ultrasonically cleaned with deionized water. After that, the platinum electrode was pickled with 2mol / L nitric acid, the Cu electrode was pickled with 2mol / L sulfuric acid, rinsed with deionized water and dried in a vacuum oven. Finally, all electrodes were cleaned with acetone and air-dried.

[0123] (3) Preparation of electrolyzer: The electrolyzer used in the experiment is a three-electrode system. Wherein, the three electrodes refer to a working electrode, a reference electrode and a counter electrode, and the intervals between the electrodes are controlled to be consistent in each experiment. The working electrode used is a copper sheet; the...

Embodiment 3

[0129] (1) Configuration of ionic liquid: configure 1mol / L SiCl 4 [BMP]Tf 2 N solution, add 0.002mol / L Cu(TFO) 2 Stir well to obtain a homogeneously dispersed yellow solution.

[0130] (2) Electrode treatment: First, the electrode is ground and polished to a mirror image with metallographic sandpaper from coarse to fine, and then ultrasonically cleaned with deionized water. After that, the platinum electrode was pickled with 2mol / L nitric acid, the Cu electrode was pickled with 2mol / L sulfuric acid, rinsed with deionized water and dried in a vacuum oven. Finally, all electrodes were cleaned with acetone and air-dried.

[0131] (3) Preparation of electrolyzer: The electrolyzer used in the experiment is a three-electrode system. Wherein, the three electrodes refer to a working electrode, a reference electrode and a counter electrode, and the intervals between the electrodes are controlled to be consistent in each experiment. The working electrode used is a copper sheet; the...

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Abstract

The invention discloses a silylene-copper-silylene composite material, preparation method and application thereof and a lithium ion battery. The preparation method of the silylene-copper-silylene composite material comprises the following steps of obtaining the silylene-copper-silylene composite material by electro-deposition of a silicon source and a copper source in an ionic liquid, wherein thesilicon source is SiCl4, copper in the copper source is divalent copper, the concentration of the copper source in the ionic liquid is (0.002-0.003)mol/L, and the potential of electro-deposition is (-1.9)-(-2.1) V. The ionic liquid is used as a medium, the silylene-copper-silylene composite material is prepared in one step by an electro-deposition method, and the silylene-copper-silylene compositematerial has the advantages of simple and convenient process, low cost, circulation and no pollution. A silylene piece layer in the prepared silylene-copper-silylene composite material is highly dispersed, and the electrode has favorable conductivity and excellent electrochemical performance.

Description

technical field [0001] The invention relates to a silicene-copper-silicene composite material, a preparation method, an application and a lithium ion battery. Background technique [0002] Sicene is an allotrope of silicon, which has a two-dimensional layered structure similar to graphene. Unlike graphene, the silicon atoms in the silicon film are not completely on the same plane, but have sp3 hybridization. Low buckling structure. Calculations predict that silicene has massless Dirac fermions, quantum spin Hall effect, and superconductivity. These properties are of great significance for the design and application of silicon-based nanoelectronic and spintronic devices. [0003] G.A. Tritsaris et al. used first-principle calculations to study the interaction between lithium and silicon in independent single-layer and double-layer silicene model electrodes, determined the strong binding sites of lithium ions, calculated the energy barrier for lithium ion diffusion, and comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/60H01M4/62H01M10/0525C25D3/66
CPCH01M4/60H01M4/362H01M4/626H01M10/0525C25D3/665H01M2004/027Y02E60/10
Inventor 李冰李国敏沈奇欣
Owner EAST CHINA UNIV OF SCI & TECH
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