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Preparation method and application of carbon-coated manganese selenide hollow cubic three-dimensional material

A cubic, manganese selenide technology, applied in electrochemical generators, active material electrodes, structural parts, etc., can solve problems such as poor Coulomb efficiency and cycle performance, and achieve easy popularization, alleviation of structural collapse, and simple preparation process. Effect

Active Publication Date: 2021-03-19
ZHENGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a lithium-ion battery anode material, manganese selenide has a high theoretical specific capacity, but poor first Coulombic efficiency and cycle performance

Method used

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  • Preparation method and application of carbon-coated manganese selenide hollow cubic three-dimensional material
  • Preparation method and application of carbon-coated manganese selenide hollow cubic three-dimensional material
  • Preparation method and application of carbon-coated manganese selenide hollow cubic three-dimensional material

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Effect test

Embodiment 1

[0038]The method of preparing the three-dimensional material of the carbon coilchaized manganese hollow cube provided in this embodiment is specifically:

[0039]Preparation of manganese carbonate cubes: prepared a carbonate cube with hot solution, take 10 mmol MnSO4· H2O and 100mmol (NH4)2SO4Dispersed in 70 mL of anhydrous ethanol, then 700 ml of deionized water was added to stir well and mixed with a solution A; take 100 mmol NH4HCO3The mixture was mixed in a solution of 700 mL of deionized water and stirred with a solution B; the B solution was added to a solution, heated to 40 ° C and stirred 8 h; after the reaction was completed, centrifuged and mixed with deionized water / ethanol Wash, dry at 65 ° C, to obtain a manganese carbonate cube, topographyimage 3 As shown, the XRD figure of the carbonate cube is asfigure 1 Indicated. In this step, one of 40-60 ° C is strongly stirred at a temperature (e.g., 45 ° C, 48 ° C, 50 ° C, 55 ° C, 60 ° C), and the stirring time can also be contr...

Embodiment 2

[0043]The method of preparing the three-dimensional material provided by the carbon coated manganese in this embodiment is the same as that of Example 1, and in the first embodiment, the prepared carbonate cubic liquid phase is obtained in the step of selenide manganese hollow cube: mixed The solution was transferred to 100 mL of stainless steel reaction kettle heated 200 ° C and held 20 h, and the topographical map of the selenide manganese cube is obtained.Figure 5 Indicated.

Embodiment 3

[0045]The method of preparing the three-dimensional material provided by the carbon coated manganese in this embodiment is the same as that of Example 1, and in the first embodiment, the prepared carbonate cubic liquid phase is obtained in the step of selenide manganese hollow cube: mixed The solution was transferred to 100 mL of stainless steel reaction kettle heated 200 ° C and held 16 h, and the topographical map of the selenide manganese cubic cube is obtained.Figure 6 Indicated.

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Abstract

The invention relates to a preparation method and an application of a carbon-coated manganese selenide hollow cubic three-dimensional material, and belongs to the technical field of new energy storagematerials. The preparation method specifically comprises the following steps: preparing a manganese carbonate cube by using a hydrothermal method; and carrying out liquid-phase selenylation on the prepared manganese carbonate cube, coating the cube with dopamine and calcining the cube to obtain the carbon-coated manganese selenide hollow cubic three-dimensional material. The material can be usedas a lithium ion battery negative electrode material, shows relatively high theoretical specific capacity and relatively long cycle performance, and also has excellent rate capability. Therefore, thematerial has great application and research prospects in the aspects of preparation and lithium storage performance of lithium ion battery anode materials.

Description

Technical field[0001]The present invention belongs to the technical field of energy storage materials, and the method and application of three-dimensional materials of carbon coated manganese holmium hollow cubes are specifically involved.Background technique[0002]With the continuous development of technology, the gradual changes in people's lifestyle, the status of lithium-ion batteries in life is getting more and more urgent, and people's demand for electrode materials with high magnification performance is more urgential. As the lithium-ion battery negative electrode material, the theoretical specific capacity of the selenium is high, but the first couluminous efficiency and cycle performance are poor. In order to overcome these disadvantages, the structural design of the selenium manganese is especially important. For example, CN 109360971 A uses four hydrated acetate, xenzophenic acid, selenium and surfactant PVP as raw materials, passed through a microspheallic metal organic f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/62H01M10/0525
CPCH01M4/58H01M4/628H01M10/0525H01M2004/027Y02E60/10
Inventor 李丹刘晓锋马建茹苏行张建民
Owner ZHENGZHOU UNIV
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