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A kind of solvothermal method prepares Cu 3 p nanosheet approach

A solvothermal method and nanosheet technology, which is applied in the field of nanomaterials and electrochemistry, can solve the problems of difficult control of process conditions, difficult to control material morphology, product agglomeration, etc., and achieve no post-processing, low cost, and lower synthesis temperature. Effect

Active Publication Date: 2020-07-14
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when using the hydrothermal method to prepare copper phosphide with a specific shape, it is often necessary to add a surfactant as a template to control the shape of the product; the ball milling method is likely to cause product agglomeration, and the process conditions are difficult to control; the high-temperature solid-phase method consumes a lot of energy , and it is easy to cause abnormal growth of particles, and it is difficult to control the shape of the material

Method used

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  • A kind of solvothermal method prepares Cu <sub>3</sub> p nanosheet approach
  • A kind of solvothermal method prepares Cu <sub>3</sub> p nanosheet approach

Examples

Experimental program
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Effect test

Embodiment 1

[0024] 1) Dissolving pyrrole in ethanol under magnetic stirring to obtain a transparent solution A with a concentration of 0.005 mol / L;

[0025] 2) According to the molar ratio of phosphorus and copper as 1:1, take copper salt and red phosphorus and add them to solution A and continue to stir to obtain a phosphorus suspension with a mass concentration of 0.004g / ml;

[0026] 3) Put the suspension in a hydrothermal kettle at 100°C for solvothermal reaction for 24 hours at a filling ratio of 50%, and wash the product with absolute ethanol after the reaction;

[0027] 4) Place the washed product in a petri dish, seal it with plastic wrap and pierce the hole, place it in a cold trap with a vacuum of 16pa, and dry it at -50°C for 3 hours to obtain Cu 3 P nanosheets.

Embodiment 2

[0029] 1) Dissolving pyrrole in ethylene glycol under magnetic stirring to obtain a transparent solution A with a concentration of 0.01mol / L;

[0030] 2) According to the molar ratio of phosphorus and copper as 1:1, take copper salt and red phosphorus and add them to solution A and continue to stir to obtain a phosphorus suspension with a mass concentration of 0.004g / ml;

[0031] 3) Put the suspension in a hydrothermal kettle at 120°C for solvothermal reaction for 18 hours at a filling ratio of 55%, and wash the product with absolute ethanol after the reaction;

[0032] 4) Place the washed product in a petri dish, seal it with plastic wrap and pierce the hole, place it in a cold trap with a vacuum of 16pa, and dry it at -50°C for 3 hours to obtain Cu 3 P nanosheets.

Embodiment 3

[0034] 1) Dissolving pyrrole in isopropanol under magnetic stirring to obtain a transparent solution A with a concentration of 0.02 mol / L;

[0035] 2) According to the molar ratio of phosphorus and copper as 1:0.5, take copper salt and red phosphorus and add them to solution A and continue stirring to obtain a phosphorus suspension with a mass concentration of 0.004g / ml;

[0036] 3) Put the suspension in a hydrothermal kettle at 140°C for solvothermal reaction for 12 hours at a filling ratio of 60%, and wash the product with absolute ethanol after the reaction;

[0037] 4) Place the washed product in a petri dish, seal it with plastic wrap and pierce the hole, place it in a cold trap with a vacuum of 16pa, and dry it at -50°C for 3 hours to obtain Cu 3 P nanosheets.

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Abstract

The invention relates to a method for preparing Cu3P nano sheets by a solvothermal method. Pyrroles is dissolved in an alcoholic solution by stirring to obtain a transparent solution A; a cupric saltand red phosphorus are added into the transparent solution A to obtain a suspension liquid; the suspension liquid is placedin a reaction vessel to make solvothermal reaction, and after reaction, a product is washed by dehydrated alcohol; and the washed product is placed in a culture dish, the culture dish is sealed by a preservative film, the preservative film is pricked, and the culture dish is placed in a cold trap and freeze-dried to obtain Cu3P nano sheets. Large equipment and strict reaction condition are not needed, a morphology control agent is not needed, raw materials are cheap and easy to obtain, post-treatment is not needed, and prepared Cu3P nano sheets are uniform in chemical composition and high in crystallinity.

Description

technical field [0001] The invention relates to the fields of nanomaterials and electrochemistry, in particular to a solvothermal method for preparing Cu 3 P nanosheet method. Background technique [0002] Lithium-ion battery, as the only secondary battery for large-scale commercial application, has played a huge role in modern society. Among many anode materials, transition metal compounds can provide a specific capacity much larger than that of graphite through conversion reactions, which is the focus of current research. However, the conversion reaction is often accompanied by large volume changes and hysteretic kinetic effects. Current research shows that, compared with oxides and sulfides, transition metal phosphides have the smallest polarization strength and are suitable as anode materials for lithium-ion batteries. Copper phosphide (Cu 3 P) As a metal-rich phosphide, the volume specific capacity is as high as 2778Ah / L, which is four times that of graphite electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M10/0525C01B25/08B82Y40/00
CPCB82Y40/00C01B25/08C01P2002/72C01P2004/03C01P2004/20C01P2004/64H01M4/5805H01M10/0525Y02E60/10
Inventor 曹丽云王勇黄剑锋寇领江李嘉胤
Owner SHAANXI UNIV OF SCI & TECH