Lithium-rich lithium iron phosphate material as well as preparation method and application thereof

A lithium iron phosphate, lithium-rich technology, applied in the field of materials, can solve problems such as high cost, unfavorable large-scale production and use, and achieve the effects of long cycle life, easy commercial application, high sensitivity and selectivity

Active Publication Date: 2019-08-02
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the efficient electrochemical detection of NO mostly relies on the use of noble metal materials, which is costly and unfavorable for large-scale production and use.

Method used

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  • Lithium-rich lithium iron phosphate material as well as preparation method and application thereof
  • Lithium-rich lithium iron phosphate material as well as preparation method and application thereof
  • Lithium-rich lithium iron phosphate material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of lithium-rich lithium iron phosphate material and working electrode coated with the material, and construction of an electrochemical sensor for nitric oxide

[0038] (1) Add lithium iron phosphate, conductive carbon black and polyvinylidene fluoride to N-methylpyrrolidone according to the mass ratio of lithium iron phosphate, conductive carbon black and polyvinylidene fluoride as 8:1:1, and mix well The mixture was obtained, and the mixture was coated on an aluminum foil with a thickness of 170 μm and dried at 120° C. for 12 hours to obtain an aluminum foil loaded with lithium iron phosphate. The aluminum foil loaded with lithium iron phosphate was used as the positive electrode, and the lithium metal sheet was used as the counter electrode. Ethylene microporous membrane is used as the separator, lithium hexafluorophosphorous lithium electrolyte with a concentration of 1M is used as the electrolyte, and a CR250 button battery is assembled in a glove box fil...

Embodiment 2

[0043] Preparation of lithium-rich lithium iron phosphate material and working electrode coated with the material, and construction of an electrochemical sensor for nitric oxide

[0044](1) Add lithium iron phosphate, conductive carbon black and polyvinylidene fluoride to N-methylpyrrolidone according to the mass ratio of lithium iron phosphate, conductive carbon black and polyvinylidene fluoride as 4:3:3, and mix well The mixture was obtained, and the mixture was coated on an aluminum foil with a thickness of 180 μm and dried at 115° C. for 10 h to obtain an aluminum foil loaded with lithium iron phosphate. The aluminum foil loaded with lithium iron phosphate was used as the positive electrode, and the lithium metal sheet was used as the counter electrode. Ethylene microporous membrane is used as the separator, lithium hexafluorophosphorous lithium electrolyte with a concentration of 1M is used as the electrolyte, and a CR250 button battery is assembled in a glove box filled w...

Embodiment 3

[0049] Preparation of lithium-rich lithium iron phosphate material and working electrode coated with the material, and construction of an electrochemical sensor for nitric oxide

[0050] (1) Add lithium iron phosphate, conductive carbon black and polyvinylidene fluoride into N-methylpyrrolidone according to the mass ratio of lithium iron phosphate, conductive carbon black and polyvinylidene fluoride as 9:0.5:0.5, and mix well The mixture was obtained, and the mixture was coated on an aluminum foil with a thickness of 160 μm and dried at 110° C. for 11 h to obtain an aluminum foil loaded with lithium iron phosphate. The aluminum foil loaded with lithium iron phosphate was used as the positive electrode, and the lithium metal sheet was used as the counter electrode. Ethylene microporous membrane is used as the separator, lithium hexafluorophosphorous lithium electrolyte with a concentration of 1M is used as the electrolyte, and a CR250 button battery is assembled in a glove box f...

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Abstract

The invention relates to a lithium-rich lithium iron phosphate material as well as a preparation method and the application thereof, and belongs to the technical field of materials. The preparation method comprises the following steps: taking lithium iron phosphate as a raw material in the material preparation process, assembling the lithium iron phosphate in a button cell and then performing charge-discharge cycles on the button cell to obtain the lithium-rich lithium iron phosphate material. The lithium-rich lithium iron phosphate material has a micro-nano-scale size, has a good lattice structure, is used for coating an electrode to form a working electrode and constructing an NO electrochemical biosensor; the sensor can be used for the direct growth of cells, can perform real-time in-situ detection on NO molecules released by the cells, shows extremely-high sensitivity and selectivity in the actual detection and is stable in electrochemical property and longer in cycle life. The material is simple and convenient in preparation process, low in raw material cost and convenient for commercial application.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a lithium-rich lithium iron phosphate material and a preparation method and application thereof. Background technique [0002] NO is a cell messenger molecule, which is produced by L-arginine and oxygen under the action of nitric oxide synthase (NOS), which can rapidly diffuse in the cell or cross the cell membrane to complete the task of the second messenger. Under normal concentration, it participates in the regulation of cell metabolism, proliferation, differentiation, apoptosis and other life activities, but when the concentration is too high, it will cause cell pathology, cause abnormal cell death, and lead to body diseases, among which it is related to the central nervous system, cardiovascular System, genitourinary system, gastrointestinal tract activity, immune process and other related lesions are often accompanied by the increase of NO concentration and be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/45G01N27/30G01N27/327G01N27/48
CPCC01B25/45G01N27/30G01N27/3275G01N27/3277G01N27/48Y02E60/10
Inventor 李长明张玉环吴超
Owner SOUTHWEST UNIV
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