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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  • 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 hi

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

Examples

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Example Embodiment

[0040] Example 1

[0041] A lithium intercalation layer Mn of this embodiment 3 O 4 The method for preparing the Li-Mn-O material of, the method specifically includes the following steps:

[0042] (1) Mix 150mL of 1mol / L fully stirred CH 3 COOLi solution is placed in a three-electrode electrolyzer, with Ag / AgCl electrode as the reference electrode, 1cm 2 As the counter electrode, put the Mn pre-deposited on the carbon cloth 3 O 4 The nanosheet array forms a three-electrode electrolytic cell system.

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

[0044] (3) After the electrochemical reaction is over, the obtained dark brown product is repeatedly washed with deionized water and ethanol, and drie...

Example Embodiment

[0047] Example 2

[0048] A cesium intercalation MnO of this embodiment 2 The method for preparing the Cs-Mn-O material of, the method specifically includes the following steps:

[0049] (1) 150mL of 2mol / L fully stirred CsNO 3 The solution is placed in a three-electrode electrolyzer, with Ag / AgCl electrode as the reference electrode, 1cm 2 Pt sheet as the counter electrode, put MnO deposited on the foam nickel in advance 2 The nanorod array forms a three-electrode electrolytic cell system.

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

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

Example Embodiment

[0053] Example 3

[0054] In this embodiment, a method for preparing a Co-Mn-O material with cobalt intercalated MnO, the method specifically includes the following steps:

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

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

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

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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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