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Manganese oxide electrode material with metal cation intercalation structure and preparation method and application thereof

A technology of metal cations and manganese oxides, applied in battery electrodes, structural parts, hybrid capacitor electrodes, etc., can solve the problems of non-rational preparation methods of binary or multi-element metal oxides, high crystallinity of materials, and unfriendly environment. Achieve the effect of controllable metal ion content, simple and controllable process, and low requirements for operators

Active Publication Date: 2020-01-24
HUBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] After searching the existing literature, it is found that the existing methods of preparing manganese-containing binary or multi-element metal oxides mostly use high-temperature sintering, resulting in high crystallinity of the material, poor electrochemical performance, and not friendly to the environment. Rational preparation method for the synthesis of manganese-containing binary or multi-element metal oxides

Method used

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  • Manganese oxide electrode material with metal cation intercalation structure and preparation method and application thereof
  • Manganese oxide electrode material with metal cation intercalation structure and preparation method and application thereof
  • Manganese oxide electrode material with metal cation intercalation structure and preparation method and application thereof

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Embodiment 1

[0041] A kind of lithium intercalation Mn of the present embodiment 3 o 4 The preparation method of Li-Mn-O material, described method specifically comprises the steps:

[0042] (1) Mix 150mL of 1mol / L well-stirred CH 3 The COOLi solution was placed in a three-electrode electrolytic cell, with an Ag / AgCl electrode as a reference electrode, 1 cm 2 The Pt sheet is used as the counter electrode, and the Mn deposited on the carbon cloth is placed in advance. 3 o 4 The array of nanosheets forms a three-electrode electrolytic cell system.

[0043] (2) Using electrochemical cyclic voltammetry in Mn 3 o 4 Lithium is intercalated on the surface of the nanosheet array. The specific process parameters of the cyclic voltammetry are as follows: the initial potential is set to 0V, the end potential is set to 1.3V, the scan rate is 5mV / s, and the number of scan segments is 1000.

[0044] (3) After the electrochemical reaction, the obtained dark brown product was repeatedly washed with...

Embodiment 2

[0048] A kind of cesium intercalation MnO of the present embodiment 2 The preparation method of the Cs-Mn-O material, described method specifically comprises the following steps:

[0049] (1) Mix 150mL 2mol / L CsNO 3 The solution is placed in a three-electrode electrolytic cell, with an Ag / AgCl electrode as a reference electrode, 1cm 2 The Pt sheet is used as the counter electrode, and the MnO deposited on the nickel foam is placed in advance. 2 Nanorod arrays form a three-electrode electrolytic cell system.

[0050] (2) Using electrochemical cyclic voltammetry in MnO 2 Cesium is embedded on the surface of the nanorod array. The specific process parameters of the cyclic voltammetry are as follows: the initial potential is set to 0V, the end potential is set to 1.3V, the scan rate is 50mV / s, and the number of scan segments is 500.

[0051] (3) After the electrochemical reaction is over, the obtained dark brown product is repeatedly washed with deionized water and ethanol, an...

Embodiment 3

[0054] A kind of preparation method of the Co-Mn-O material of cobalt intercalation MnO of the present embodiment, described method specifically comprises the following steps:

[0055] (1) Mix 150mL 5mol / L CoSO 4 The solution is placed in a three-electrode electrolytic cell, the Ag / AgCl electrode is used as a reference electrode, 1cm 2 The Pt sheet is used as the counter electrode, and the MnO nanoparticles deposited on the carbon nanotubes are placed in advance to form a three-electrode electrolytic cell system.

[0056] (2) Cobalt embedding on the surface of MnO nanoparticles by electrochemical cyclic voltammetry, the specific process parameters of the cyclic voltammetry are as follows: the initial potential is set to 0V, the termination potential is 1.3V, and the scan rate is 100mV / s, The number of scanning segments is 2000 segments.

[0057] (3) After the electrochemical reaction, the obtained dark brown product was repeatedly washed with deionized water and ethanol, and...

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Abstract

The invention discloses a manganese oxide electrode material with a metal cation intercalation structure. In the material, metal cations are inserted between the layers of the original manganese oxide, and a metal nano sheet is also grown on the surface. The insertion of the cations increases the layer spacing so as to facilitate insertion and removal of the ions in the electrolyte during the charging and discharging process. The increase of the specific surface area provides larger contact sites for the ions in the electrolyte. The preparation method of the electrode material is as follows: 1), placing 0.1-10mol / L metal salt solution in a three-electrode electrolytic cell, taking the Ag / AgCl electrode as a reference electrode and the platinum sheet as a counter electrode and putting the manganese oxide into the three-electrode electrolytic cell to form a three-electrode system; 2), using the scanning rate of 5-500mV / s to electrochemically embed the metal cations into the manganese oxide material, wherein the number of segments can be 200-2000 segments; and 3) repeatedly cleaning the black-brown product and vacuum drying.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a manganese oxide electrode material with a metal cation intercalation structure and its preparation method and application, especially in zinc-ion batteries, lithium-ion batteries, sodium-ion batteries and supercapacitor hybrid devices etc. applications. Background technique [0002] Rechargeable aqueous lithium-ion (LIBs) batteries have become the mainstream of batteries due to their high energy density, and aqueous zinc-ion batteries (ZIBs) have also received continuous attention due to their low cost, high safety, and environmental protection. Metal ions have natural advantages such as environmental friendliness and low cost, so flexible ion batteries are considered to be the most effective method for wearable electronic devices. Metal-ion batteries have high stability and low cost pressure in terms of raw material availability, so metal-io...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01G11/30H01G11/46
CPCH01G11/30H01G11/46H01M4/366H01M4/505Y02E60/10
Inventor 万厚钊王能泽王浩汪汉斌张军
Owner HUBEI UNIV
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