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

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

Active Publication Date: 2021-05-25
HUBEI UNIV
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  • Summary
  • 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 its preparation method and application
  • Manganese oxide electrode material with metal cation intercalation structure and its preparation method and application
  • Manganese oxide electrode material with metal cation intercalation structure and its preparation method and application

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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. The material inserts metal cations between the layers of the original manganese oxide, and at the same time grows metal nanosheets on the surface. The insertion of cations increases the thickness of the layer The spacing is more convenient for the insertion and extraction of ions in the electrolyte during charging and discharging, and the increase in specific surface area provides larger contact sites for ions in the electrolyte. The preparation method of the electrode material of the present invention is as follows: ①Use 0.1~10mol / L metal salt solution to place in the three-electrode electrolyzer, with Ag / AgCl electrode as reference electrode, platinum sheet as counter electrode, the oxide of manganese Put it into a three-electrode electrolytic cell to form a three-electrode system; ② Use a scan rate of 5-500mV / s to electrochemically intercalate metal cations on manganese oxide materials, and the number of segments can be 200-2000; ③ Wash the above dark brown products repeatedly, Vacuum drying is sufficient.

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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Patent Type & Authority Patents(China)
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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