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Binder-free oxygen-defect-containing carbon-coated oxide electrode and battery

A binder-free, oxide-free technology, applied in battery electrodes, secondary batteries, circuits, etc.

Active Publication Date: 2021-09-10
XIAMEN UNIV
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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 overcome the deficiencies of the prior art, and provide a carbon-coated oxide electrode and battery without a binder and containing oxygen defects, which solves the problem of the positive electrode in the magnesium secondary battery in the above-mentioned background technology

Method used

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  • Binder-free oxygen-defect-containing carbon-coated oxide electrode and battery
  • Binder-free oxygen-defect-containing carbon-coated oxide electrode and battery
  • Binder-free oxygen-defect-containing carbon-coated oxide electrode and battery

Examples

Experimental program
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Effect test

Embodiment 1

[0033] In this embodiment, a carbon-coated V containing oxygen defects 2 o 5-Z Electrode, the preparation method is as follows:

[0034] Ammonium metavanadate is selected as the reactant, and water is used as the solvent. Weigh 1g of ammonium metavanadate into a beaker, add 100mL of water, adjust the pH value of the mixed solution to 4 with hydrochloric acid, place the titanium foil in the mixed solution and transfer it to the reaction vessel, and keep it at 150°C for 6h. After natural cooling, the titanium foil was collected, washed repeatedly with deionized water, and dried in vacuum for 10 h. Finally, the titanium foil was calcined at 700 °C for 2 h in a 5% acetylene / argon atmosphere to obtain carbon-coated V with oxygen defects. 2 o 5-Z Material.

[0035] The electrode of this embodiment is made of titanium foil current collector and active material V 2 o 5-Z composition, the active material grows directly on the surface of the current collector, Figure 5 It can be...

Embodiment 2

[0037] The difference between this embodiment and embodiment 1 is;

[0038] Select ferrous sulfate as reactant, water as solvent. Weigh 1.5g of ferrous sulfate into a beaker, add 150mL of water, adjust the pH value of the mixed solution to 5 with sulfuric acid, place the titanium foil in the mixed solution and transfer it to the reaction vessel, and keep it at 180°C for 10h. After natural cooling, the titanium foil was collected, washed repeatedly with deionized water, and dried in vacuum for 10 h. Finally, the titanium foil was calcined at 650 °C for 4 h in a 5% acetylene / argon atmosphere to obtain carbon-coated Fe with oxygen defects. 2 o 3-Z Material.

experiment example 3

[0040] The difference between this embodiment and embodiment 1 is;

[0041] Select tin chloride as the reactant and water as the solvent. Weigh 1.2g of tin chloride into a beaker, add 150mL of water, adjust the pH value of the mixed solution to 6 with acetic acid, place the titanium foil in the mixed solution and transfer it to a reaction vessel, and keep it at 200°C for 12h. After natural cooling, the titanium foil was collected, washed repeatedly with deionized water, and dried in vacuum for 10 hours. Finally, the titanium foil was calcined at 550 °C for 6 hours in a 5% acetylene / argon atmosphere to obtain carbon-coated SnO with oxygen defects. 2-Z Material.

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Abstract

The invention discloses a binder-free oxygen-defect-containing carbon-coated oxide electrode and a battery. The electrode is composed of a current collector and an active material, wherein the active material directly grows on the surface of the current collector and has a three-dimensional honeycomb structure, the active material is a carbon-coated oxide containing oxygen defects, the general formula of the oxide is MXOY-Z, and M comprises at least one of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo and Sn. The battery is a magnesium secondary battery, wherein the positive electrode of the battery adopts the binder-free oxygen-defect-containing carbon-coated oxide electrode, and the battery has good electrochemical performance.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a carbon-coated oxide electrode without a binder and containing oxygen defects and a battery. Background technique [0002] In the past 20 years, lithium-ion batteries have attracted extensive attention in the field of energy storage due to their high energy density. However, with the advancement of lithium-ion battery research, its energy density has been difficult to further increase, and safety accidents have occurred during the practical process. and other issues, the magnesium secondary battery has a high volume specific capacity (3833mA h / cm 3 ), low price, and high safety have been considered to have great potential in large-scale energy storage applications in recent years. [0003] However, the development of magnesium secondary batteries is limited by the lack of suitable cathode materials, and most of the cathode materials suitable for lithium-ion batter...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/583H01M4/62H01M10/0525
CPCH01M4/366H01M4/48H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 赵金保武东政曾静
Owner XIAMEN UNIV
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