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Antimony-based integrated electrode and preparation method and application thereof

An electrode, antimony-based technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low battery energy density, cumbersome preparation method of antimony-based integrated electrodes, etc., to improve energy density, reduce shedding, and simple process. Effect

Active Publication Date: 2022-06-21
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of antimony-based integrated electrode and its preparation method and application

Method used

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  • Antimony-based integrated electrode and preparation method and application thereof
  • Antimony-based integrated electrode and preparation method and application thereof
  • Antimony-based integrated electrode and preparation method and application thereof

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preparation example Construction

[0029] The invention provides a preparation method of an antimony-based integrated electrode, comprising:

[0030]Step 1: cleaning the titanium foil to be deposited, and then vacuum drying; the cleaning treatment is preferably ultrasonic cleaning of the titanium foil to be deposited with acetone, ethanol and deionized water; the vacuum drying temperature The temperature is preferably 60° C., and the time is preferably 20 minutes; the thickness of the titanium foil is preferably 10-30 μm.

[0031] Step 2: SbF in the reactor 3 Aqueous solution, put the titanium foil obtained in step 1 vertically in the reactor, then place the twisted reactor in an oven, heat the oven to 140-200°C and keep it for 8-16h, preferably at 180°C for 12h, to obtain The surface of the titanium foil has deposited layers, followed by in-situ deposited Sb 3+ Sb 5+ o 4 layer and in situ coated Ti(OH) 4 layer; the SbF 3 The mass fraction of the aqueous solution is preferably 0.33-0.50%, more preferably ...

Embodiment 1

[0042] Step 1: The surface of the titanium foil (30mm×45mm) to be deposited is ultrasonically cleaned with acetone, ethanol and deionized water, and dried in a vacuum drying oven for 20 minutes;

[0043] Step 2: Prepare SbF with a mass fraction of 0.33% in a 50mL reactor 3 Aqueous solution, put the titanium foil obtained in step 1 vertically in the reactor, then place the twisted reactor in an oven, heat the oven to 180°C and keep it for 12h, the titanium foil obtained has a deposited layer on the surface, followed by the original bit-deposited Sb 3+ Sb 5+ o 4 layer and in situ coated Ti(OH) 4 layer, the deposition method is chemical deposition;

[0044] Step 3: Fix the titanium foil obtained in step 2, specifically: place the titanium foil in the constant temperature zone of the tube furnace, and then seal the tube furnace; then vacuumize the tube furnace first, and then Introduce argon, then evacuate, and then inflow argon until repeating the operation three times, then...

Embodiment 2

[0049] The steps of this embodiment are the same as in Embodiment 1, the difference is that SbF 3 The mass fraction of the aqueous solution is 0.41%; figure 2 As shown, the XRD analysis results confirmed the presence of Sb in the obtained samples 3+ Sb 5+ o 4 Mutually.

[0050] like Figure 4 shown, at 0.5A g -1 316.1mAh g can still be released after 50 cycles at the highest current density -1 The specific capacity, its first coulombic efficiency is 66.5%.

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Abstract

The invention provides an antimony-based integrated electrode and a preparation method and application thereof, and belongs to the technical field of electrode preparation methods. The method comprises the following steps: sequentially performing in-situ deposition of yellow antimony ore (Sb < 3 + > Sb < 5 + > O4) and in-situ coating of a titanium hydroxide (Ti (OH) 4) layer on a titanium foil substrate by using a hydrothermal reaction process, and heating the obtained product in an argon gas environment by using a tubular furnace to perform firming treatment. The electrode is of a multi-layer structure and comprises a titanium foil, and a Sb < 3 + > Sb < 5 + > O4 layer and a titanium dioxide (TiO2) coating layer are sequentially deposited on the surface of the titanium foil in an in-situ mode. According to the antimony-based integrated electrode, battery active substances are firmly treated on a battery pole piece current collector in the manufacturing process, use of additives is avoided, and when the antimony-based integrated electrode is applied to lithium and sodium ion batteries, the energy density of the batteries can be improved, and falling of Sb < 3 + > Sb < 5 + > O4 layers and TiO2 layers can be restrained to a certain extent.

Description

technical field [0001] The invention belongs to the technical field of electrode preparation methods, and in particular relates to an antimony-based integrated electrode and its preparation method and application. Background technique [0002] With the development of secondary battery technology, high energy density and flexibility of lithium and sodium ion batteries have become people's pursuit. Integrated electrodes have been widely studied because of their high energy density and flexibility. Among the alloy-like materials, antimony (Sb) is a strong contender for the anode of lithium-ion batteries and sodium-ion batteries because of its two-dimensional shrinkage layer structure, which is beneficial to improve the electrical conductivity. Meanwhile, the Sb-rich interlayer spacing is not only beneficial for lithium ions with smaller ionic radii It is also conducive to the storage of sodium ions with larger ionic radii storage. It is worth noting that Na has a lower pot...

Claims

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Application Information

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IPC IPC(8): H01M4/1391H01M4/131H01M4/48H01M4/62H01M10/0525H01M10/054
CPCH01M4/1391H01M4/628H01M4/483H01M4/131H01M10/0525H01M10/054Y02E60/10
Inventor 程勇王照民尹东明王春丽梁飞吴耀明王立民
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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