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Method for preparing microelectrode by using spray drying method

A spray drying method and electrode preparation technology, which is applied in the field of microelectrode preparation by spray drying method, can solve the problems of complex microelectrode production, high cost, and difficult electrochemical characterization, and achieve excellent electrochemical performance, low cost, and simple operation Effect

Active Publication Date: 2019-05-14
HAINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Common microelectrode forms include microdisk electrodes, powder microelectrodes, and single-particle ultramicroelectrodes. However, the above-mentioned forms of microelectrodes are relatively complicated to manufacture, cost is relatively high, and electrochemical characterization is difficult. Therefore, a method for preparing microelectrodes is needed, not only The operation is simple, the cost is low, and the obtained microelectrode is easy to perform electrochemical characterization, and at the same time has excellent electrochemical performance

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  • Method for preparing microelectrode by using spray drying method
  • Method for preparing microelectrode by using spray drying method
  • Method for preparing microelectrode by using spray drying method

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Embodiment 1

[0030] A kind of method utilizing spray drying method to prepare lithium iron phosphate microelectrode, comprises the following steps:

[0031] (1) 0.028moL of LiH 2 PO 4 , 0.028moL of FeCl 2 4H 2 O, 0.00028moL of LiOH·H 2 O and 0.83125g of sucrose were added to 30mL of deionized water, and after adding 10mL of concentrated hydrochloric acid, the volume was adjusted to 200mL with deionized water, and mixed evenly to obtain a lithium iron phosphate precursor solution.

[0032] (2) Atomize the lithium iron phosphate precursor solution with an ultrasonic atomizer, aim the mist outlet at a pre-fixed platinum wire with a diameter of 30 μm, and use a heat gun to blow out 500°C high-temperature hot air at the platinum wire at the same time, Make the droplets of the lithium iron phosphate precursor solution form a lithium iron phosphate coating on the platinum wire;

[0033] (3) The platinum wire coated with lithium iron phosphate is placed in the middle of the quartz boat, and a...

Embodiment 2

[0035] A kind of method utilizing spray drying method to prepare lithium iron phosphate microelectrode, comprises the following steps:

[0036] (1) 0.042moL of LiH 2 PO 4 , 0.042moL of FeCl 2 4H 2 O, 0.0021moL of LiOH·H 2 O and 0.88125g of sucrose were added to 80mL of deionized water, and after adding 20mL of concentrated hydrochloric acid, the volume was adjusted to 200mL with deionized water, and mixed evenly to obtain a lithium iron phosphate precursor solution.

[0037] (2) Use an ultrasonic atomizer to atomize the lithium iron phosphate precursor solution, aim the mist outlet at a pre-fixed platinum wire with a diameter of 100 μm, and use a hot air gun to aim at the platinum wire and blow out 600 ° C high-temperature hot air, Make the droplets of the lithium iron phosphate precursor solution form a lithium iron phosphate coating on the platinum wire;

[0038] (3) The platinum wire coated with lithium iron phosphate is placed in the middle of the quartz boat, and an ...

Embodiment 3

[0040] A kind of method utilizing spray drying method to prepare lithium iron phosphate microelectrode, comprises the following steps:

[0041] (1) 0.036moL of LiH 2 PO 4 , 0.036moL of FeCl 2 4H 2 O, 0.00108moL of LiOH·H 2 O and 0.85188g of sucrose were added to 50mL of deionized water, and after adding 15mL of concentrated hydrochloric acid, the volume was adjusted to 200mL with deionized water, and mixed evenly to obtain a lithium iron phosphate precursor solution.

[0042] (2) Atomize the lithium iron phosphate precursor solution with an ultrasonic atomizer, aim the mist outlet at a pre-fixed platinum wire with a diameter of 50 μm, and use a heat gun to blow out 550°C high-temperature hot air at the platinum wire, Make the droplets of the lithium iron phosphate precursor solution form a lithium iron phosphate coating on the platinum wire;

[0043] (3) The platinum wire coated with lithium iron phosphate is placed in the middle of the quartz boat, and an appropriate amo...

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Abstract

The invention provides a method for preparing a microelectrode by using a spray drying method. The method comprises the steps that an electrode material precursor solution is firstly prepared; then the atomized material precursor solution is plated on the surface of a metal wire by using the spray drying method; and the metal wire plated with an electrode material and a carbon source compound arefinally sintered at high temperature in an atmosphere of inert gas, reducing gas or a combination of the inert gas and the reducing gas to prepare the microelectrode. The method is easy to operate andlow in cost, and the obtained microelectrode can perform electrochemical characterization easily, and the electrochemical performance is excellent.

Description

technical field [0001] The invention relates to the technical field of microelectrode processing, in particular to a method for preparing microelectrodes by spray drying. Background technique [0002] At present, centimeter-scale conventional electrodes are commonly used for electrochemical analysis of electrode materials, but due to their own characteristics, this scale electrode often has problems such as poor sensitivity and low signal-to-noise ratio. When analyzing the microscopic reaction mechanism of electrode materials, large-area electrodes are easily affected by the uncompensated potential drop of the solution electrode during polarization, resulting in biased potential predictions. In cyclic voltammetry tests, large non-Faraday signals make Faraday The behavior is not obvious, and in addition, the long charge and discharge time makes the lifetime evaluation of conventional electrodes extremely long. The scale of microelectrodes can usually reach the micron level o...

Claims

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Application Information

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IPC IPC(8): G01N27/30
Inventor 李德郭小龙陈永兰图
Owner HAINAN UNIVERSITY