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Method for preparing nano-pore ferric phosphate, nano-pore ferric phosphate and application

A technology of iron phosphate and nanopores, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve problems such as difficult recovery of surfactants, complex process flow, strict reaction conditions, etc., and achieve excellent electrochemical performance, process Simple, material-reactive effect

Active Publication Date: 2014-12-10
INST OF PHYSICS - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the object of the present invention is to overcome the problems such as small output, high cost, strict reaction conditions, complicated process flow, etc. existing in the preparation method of nanoporous iron phosphate, and the obtained product has many impurities, large particle size, and low activity. And surfactants are difficult to recycle and cause waste and other defects, provide a nanoporous iron phosphate preparation method with simpler process, lower cost, better product specifications and performance, and easier industrial production, and the extraction agent used in the method also reusable

Method used

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  • Method for preparing nano-pore ferric phosphate, nano-pore ferric phosphate and application
  • Method for preparing nano-pore ferric phosphate, nano-pore ferric phosphate and application
  • Method for preparing nano-pore ferric phosphate, nano-pore ferric phosphate and application

Examples

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Embodiment 1

[0042] This example is used to illustrate the method for preparing nanoporous iron phosphate of the present invention.

[0043] 1) Preparation of iron source solution: weigh 1g Fe(NO 3 ) 3 9H 2 O was dissolved in 8 mL of ethanol to obtain an iron source solution, in which the concentration of iron was 0.29 mol / L.

[0044] 2) Preparation of extractant: 5g of N1923 (purchased from Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences) was weighed and mixed with 50mL of n-heptane to prepare extractant, wherein N1923 accounted for 10wt% of the extractant.

[0045] 3) Preparation of phosphorus source solution: mix the extractant with 3.1mol / L phosphoric acid aqueous solution to extraction equilibrium, and then separate the organic phase containing phosphoric acid after standing still, which is the phosphorus source solution, wherein the concentration of phosphorus element is 0.3mol / L L.

[0046] 4) Preparation of nanoporous iron phosphate: according to the molar ...

Embodiment 2

[0052] This example is used to illustrate the method for preparing nanoporous iron phosphate of the present invention.

[0053] The steps of preparing nanoporous iron phosphate in this embodiment are basically the same as in Example 1, the only difference being:

[0054] In step 1), weigh 0.4g Fe(NO 3 ) 3 9H 2 O was dissolved in 10 mL of ethanol, and the concentration of iron element in the obtained iron source solution was 0.1 mol / L. In step 3), the concentration of phosphoric acid solution is 1.7mol / L; the concentration of phosphorus element in the obtained phosphorus source solution is 0.28mol / L. In step 4), the iron source solution and the phosphorus source solution are respectively measured according to the molar ratio of the iron element and the phosphorus element being 1:1; the obtained precipitate is washed with ethanol.

[0055] Measured using the same assay method as in Example 1, the average pore diameter of the nanoporous iron phosphate of the present embodimen...

Embodiment 3

[0058] This example is used to illustrate the method for preparing nanoporous iron phosphate of the present invention.

[0059] The steps of preparing nanoporous iron phosphate in this embodiment are basically the same as in Example 1, the only difference being:

[0060] In step 1), weigh 1g FeCl 3 9H 2 O was dissolved in 10 mL of ethanol, and the iron element concentration in the obtained iron source solution was 0.37 mol / L. In step 2), 1.25g of N235 (purchased from sigma company) was weighed and mixed with 25mL of benzene to prepare an extractant, and N235 accounted for 5wt% of the extractant. In step 3), the concentration of phosphoric acid solution is 1.5mol / L; the concentration of phosphorus element in the obtained phosphorus source solution is 0.18mol / L. In step 4), the iron source solution and the phosphorus source solution are respectively measured according to the molar ratio of the iron element and the phosphorus element being 1:1; the obtained precipitate is wash...

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Abstract

The invention provides a method for preparing nano-pore ferric phosphate, nano-pore ferric phosphate and an application, the preparation method comprises the following steps: 1)preparation of an iron source solution: dissolving ferric salt or its aquo-complex in ethanol to prepare the iron source solution; wherein, the iron element concentration in the iron source solution is 0.1-0.5mol / L; 2)preparation of an extractant: mixing an organic amine compound and a diluent to prepare the extractant; wherein, the organic amine compound accounts for 5-50wt% of extractant; 3)preparation of a phosphor source solution: mixing the extractant obtained in the step 2) and a phosphoric acid aqueous solution to balanced extraction, standing and then separating to obtain a phosphoric acid-containing organic phase which is the phosphor source solution; wherein, the phosphor element concentration in the phosphor source solution is 0.1-0.3mol / L; 4) preparation of nano-pore ferric phosphate: weighting the iron source solution and the phosphor source solution according to mol ratio of iron to phosphor at 1:1-3, mixing to form deposition, and separating, washing and drying to obtain the nano-pore ferric phosphate.

Description

technical field [0001] The invention relates to a method for preparing nanoporous iron phosphate, nanoporous iron phosphate and its application, in particular to a method for preparing nanoporous iron phosphate basically using a non-aqueous system, nanoporous iron phosphate and its application. Background technique [0002] Iron phosphate has excellent electrochemical properties, so it has important application value in the field of electrode materials for lithium secondary batteries. Nano- and micro-scale iron phosphate, especially nanoporous iron phosphate, has a large specific surface area and activity, and can be directly used as a positive electrode material with good charge and discharge performance. As another positive electrode material for lithium secondary batteries, that is, lithium iron phosphate prepared by using the nanoporous iron phosphate, its electrochemical performance has also been significantly improved. Nanoporous iron phosphate has broad application p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58C01B25/37C01B25/45
CPCY02E60/10
Inventor 胡勇胜赵君梅马洁简泽浪王福春陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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