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In-situ doped nanometer molybdenum-based material as well as preparation method and application thereof

An in-situ doping and nanotechnology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as difficult control of coating and doping, to improve electrochemical performance, Effect of high discharge specific capacity and performance improvement

Inactive Publication Date: 2018-07-24
HARBIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current strategy can only achieve the purpose of improving the electrochemical performance of the material by changing its morphology and particle size distribution. It is difficult to control the amount of coating and doping, as well as the uniformity of the surface, and fundamentally control and improve the electrode material. Compatibility

Method used

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  • In-situ doped nanometer molybdenum-based material as well as preparation method and application thereof
  • In-situ doped nanometer molybdenum-based material as well as preparation method and application thereof
  • In-situ doped nanometer molybdenum-based material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] An in-situ doped nano-molybdenum-based material provided in an embodiment of the present invention, its preparation method specifically includes the following steps:

[0028] S1. Starting with 0.2200g of 1,6-bis(triazole)hexane, 2.4000g of ammonium heptamolybdate, 0.6475g of manganese chloride, 0.7999g of strontium chloride and 2.00mL of phosphoric acid, 36.00mL of water As a solvent, mix and stir for 60 minutes, adjust the pH value to 3 with sodium hydroxide to obtain a mixed solution;

[0029] S2. Transfer the mixed solution obtained in S1 to a reaction kettle, and react at 160° C. for 4 days. After the reaction, naturally cool to room temperature to obtain precursor reactant crystals;

[0030] S3, the precursor reactant crystal obtained in S2 is washed, filtered, dried, and placed in a tube furnace under N 2 Under protection, it was calcined at 600°C for 8 hours. After the calcination, it was naturally cooled to room temperature to obtain a calcined product, and the...

Embodiment 2

[0033] An in-situ doped nano-molybdenum-based material provided in an embodiment of the present invention, its preparation method specifically includes the following steps:

[0034] S1. Starting with 0.2200g of 1,6-bis(triazole)hexane, 2.4000g of ammonium heptamolybdate, 0.6475g of manganese chloride, 0.7999g of strontium chloride and 2.00mL of phosphoric acid, 40.50mL of water As a solvent, mix and stir for 60 minutes, adjust the pH value to 3.5 with sodium hydroxide to obtain a mixed solution;

[0035] S2. Transfer the mixed solution obtained in S1 to a reaction kettle, and react at 160° C. for 5 days. After the reaction is completed, naturally cool to room temperature to obtain a reaction solution;

[0036] S3, the reaction solution obtained in S2 is washed, filtered, dried, and heated in a tube furnace under N 2 Under protection, it was calcined at 650°C for 7 hours. After the calcination, it was naturally cooled to room temperature to obtain a calcined product, and then ...

Embodiment 3

[0039] An in-situ doped nano-molybdenum-based material provided in an embodiment of the present invention, its preparation method specifically includes the following steps:

[0040]S1. Starting with 0.2200g of 1,6-bis(triazole)hexane, 2.4000g of ammonium heptamolybdate, 0.6475g of manganese chloride, 0.7999g of strontium chloride and 2.00mL of phosphoric acid, 45.00mL of water As a solvent, mix and stir for 60 minutes, adjust the pH value to 4 with sodium hydroxide to obtain a mixed solution;

[0041] S2. Transfer the mixed solution obtained in S1 to a reaction kettle, and react at 160° C. for 6 days. After the reaction is completed, naturally cool to room temperature to obtain a reaction solution;

[0042] S3, the reaction solution obtained in S2 is washed, filtered, dried, and heated in a tube furnace under N 2 Under protection, it was calcined at 700°C for 6 hours. After the calcination, it was naturally cooled to room temperature to obtain a calcined product, and then the...

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Abstract

The invention discloses an in-situ doped nanometer molybdenum-based material as well as a preparation method and application thereof and belongs to the field of lithium ion battery preparation. The preparation method comprises the following steps of by taking 1,6-bis(triazole)hexane, ammonium heptamolybdate, manganous chloride, strontium chloride and phosphoric acid as starting materials, synthesizing manganese substituted organic-inorganic hybrid phosphmolybdate material with an intermediate temperate hydrothermal one-pot synthesizing method; and by taking a modified phosphmolybdate derivative as a precursor, performing high-temperature burning in a nitrogen environment to successfully prepare the porous doped nanometer molybdenum-based composite. In addition, a coralliform porous nanometer structure formed by a precursor method realizes regulation of morphology, particle size distribution, specific surface area and tap density of the molybdenum-based material, and thus the performance of a lithium ion battery is improved; and after 300 cycles under large current density of 500mA / g, the reversible capacity of a lithium ion capacitor-battery is still higher than 95 percent.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to an in-situ doped nano-molybdenum-based material, a preparation method and an application. Background technique [0002] As a new generation of clean energy, lithium-ion batteries have significant advantages such as small size, large energy storage, high working voltage, long cycle life, and no memory effect. They are widely used in smart phones, notebook computers, digital cameras, electronic watches, etc. . [0003] As a key part of lithium-ion batteries, electrode materials account for more than 50% of the cost of the entire battery. At present, for commercial lithium-ion batteries, graphite is a commonly used negative electrode material, but the energy density and power density of graphite are low, and its low lithium intercalation potential is also prone to safety problems. Therefore, the development of a high energy density, high Negative electrod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/362H01M4/5825H01M10/0525H01M2220/30Y02E60/10
Inventor 于凯周百斌吕菁华张鹤王博王春梅
Owner HARBIN NORMAL UNIVERSITY
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