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Preparation method and application of leaf-shaped cobalt phosphate nanosheet

A technology of cobalt phosphate nano and cobalt phosphate, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problem of less transition metal phosphide materials, and achieve low cost, convenient mass production, The effect of mild and controllable reaction conditions

Active Publication Date: 2018-09-28
GUANGZHOU YIXIN BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, there are very few reports on the synthesis of transition metal phosphide materials for flexible symmetric supercapacitors.

Method used

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  • Preparation method and application of leaf-shaped cobalt phosphate nanosheet
  • Preparation method and application of leaf-shaped cobalt phosphate nanosheet
  • Preparation method and application of leaf-shaped cobalt phosphate nanosheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides a method for preparing cobalt phosphate nanosheets in the shape of leaves, such as figure 1 As shown, follow the steps below:

[0042] Step 1: Preparation of Co(CH 3 COO) 2 4H 2 O solution: Measure 35 ml of 0.3 mol / L Co(CH 3 COO) 2 4H 2 O solution was dispersed in 15 ml ethylene glycol solvent, stirred at room temperature, and Co(CH 3 COO) 2 4H 2 O is fully dissolved in the solvent to produce Co(CH 3 COO) 2 4H 2 O solution;

[0043] Step 2: Preparation of cobalt phosphate precursor: to the above Co(CH 3 COO) 2 4H 2 Add 35 ml to the O solution, the concentration is 0.2mol / L NH 4 h 2 PO 4 solution, and stir evenly to obtain a cobalt phosphate precursor;

[0044] Step 3: Hydrothermal reaction: the cobalt phosphate precursor solution was placed in a 100 ml Teflon-lined stainless steel autoclave, and reacted at a constant temperature of 120°C for 15 hours. After centrifugation, the obtained solid was precipitated with Alternately w...

Embodiment 2

[0049] Such as figure 1 As shown, the present embodiment provides a method for preparing leaf-shaped cobalt phosphate nanosheets, which is carried out according to the following steps:

[0050] Step 1: Preparation of Co(CH 3 COO) 2 4H 2 O solution: Measure 30 ml of 0.3 mol / L Co(CH 3 COO) 2 4H 2 The O solution was dispersed in 10 ml ethylene glycol solvent, stirred at room temperature, and the Co(CH 3 COO) 2 4H 2 O is fully dissolved in the solvent to produce Co(CH 3 COO) 2 4H 2 O solution;

[0051] Step 2: Preparation of cobalt phosphate precursor: to the above Co(CH 3 COO) 2 4H 2 Add 35 ml to the O solution, the concentration is 0.2mol / L NH 4 h 2 PO 4 solution, and stir evenly to obtain a cobalt phosphate precursor;

[0052] Step 3: Hydrothermal reaction: The cobalt phosphate precursor solution was placed in a 100 ml polytetrafluoroethylene-lined reaction kettle, and reacted at a constant temperature of 110°C for 12 hours. After centrifugation, the obtained ...

Embodiment 3

[0055] This example provides a three-electrode system made of the leaf-shaped cobalt phosphate nanosheets prepared in Example 1, and the electrochemical performance test of the cobalt phosphate nanosheet three-electrode system is prepared by the following sequential steps:

[0056] (1) According to the mass ratio of 80:5:15, weigh cobalt phosphate nanosheets, polytetrafluoroethylene, and acetylene carbon black and place them on a nickel foam substrate of 1 square centimeter, and then use a thin film under an applied pressure of 7 MPa The foil is pressed tightly to obtain the cobalt phosphate electrode material loaded on the nickel foam, and the cobalt phosphate nanosheet electrode material is used as a capacitor electrode sheet;

[0057] (2) The cobalt phosphate / polytetrafluoroethylene / acetylene carbon black flexible symmetrical supercapacitor electrode material obtained above was assembled into a three-electrode system, in which a certain proportion of cobalt phosphate / polytet...

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Abstract

The invention relates to a preparation method and an application of a leaf-shaped cobalt phosphate nanosheet. The specific preparation steps are as follows: preparing a Co(CH3COO)2.4H2O solution, namely measuring Co(CH3COO)2.4H2O, dispersing the same in an ethylene glycol solvent, so that the Co(CH3COO)2.4H2O is fully dissolved in the solvent to prepare the Co(CH3COO)2.4H2O solution; preparing a cobalt phosphate precursor solution, namely adding a NH4H2PO4 solution to the Co(CH3COO)2.4H2O solution, and stirring uniformly to obtain the cobalt phosphate precursor solution; performing a hydrothermal reaction: placing the cobalt phosphate precursor solution in a reaction kettle, reacting for 12-15h at a constant temperature of 110-120 DEG C, performing centrifuging, washing and drying to obtain cobalt phosphate powder; and performing nitrogen atmosphere heat treatment: performing the heat treatment on the cobalt phosphate powder under a nitrogen atmosphere for 5-6h to obtain the leaf-shaped cobalt phosphate nanosheet. The preparation process provided by the invention is simple and safe, the reaction condition is mild and controllable, the cost is low, and the cycle is short. The invention discloses an application of the cobalt phosphate nanosheet in a supercapacitor, and relatively high specific capacity, high energy density and stability are shown.

Description

technical field [0001] The invention relates to the preparation and application of inorganic nanometer materials, in particular to a method for preparing leaf-shaped cobalt phosphate nanosheets and its application. Background technique [0002] A supercapacitor is a new energy device between a secondary battery and a traditional physical capacitor. It has the dual functions of a capacitor and a battery. Its power density is much higher than that of ordinary batteries (10-100 times), and its energy density is much higher than that of ordinary batteries. Traditional physical capacitance (>100 times), compared with traditional capacitors, the energy density stored in super capacitors is more than 10 times that of traditional capacitors; compared with batteries, it has higher power density, shorter charge and discharge time, and high charge and discharge efficiency , Long cycle life and other advantages. It is precisely because of its advantages of non-pollution, low mass, l...

Claims

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Application Information

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IPC IPC(8): H01G11/26H01G11/30H01G11/56H01G11/86B82Y30/00
CPCB82Y30/00H01G11/26H01G11/30H01G11/56H01G11/86Y02E60/13
Inventor 毛辉金祝年刘振香於蕾蕾陈圣懿许海峰陈江赟
Owner GUANGZHOU YIXIN BIOTECH CO LTD
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