Preparation method of iron phosphate

A technology of ferric phosphate and ferrous phosphate, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve problems such as poor crystal form and large particle size, improve tap density, reduce material loss, and increase energy consumption with artificial effects

Inactive Publication Date: 2017-08-11
NANTONG BAICHUAN NEW MATERIAL CO LTD +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The ferric phosphate produced by using iron and its oxides as the iron source has advantages over the ferric phosphate produced by iron salt, but compared with the ferric phospha

Method used

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Example Embodiment

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0022] In a specific embodiment of the present invention, a preparation method of iron phosphate is disclosed, and the preparation method is as follows:

[0023] S1. Put 0.5mol iron powder with a molar ratio of 1:1.01 and 0.505mol phosphoric acid and phosphoric acid mother liquor into the reaction kettle, add distilled water to make the solid content 5%, gradually increase the temperature to 96°C for 0.5h reaction, and filter;

[0024] S2. Put the filtrate into the reaction kettle, add 0.25mol 30% hydrogen peroxide according to t...

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Abstract

The invention relates to the technical field of energy materials, and in particular relates to a preparation method of iron phosphate. Relatively pure iron and a small amount of iron oxide are used as raw materials to react with phosphoric acid to obtain iron phosphate which is then water-washed and oven-dried to obtain an iron phosphate product with uniform particle size and excellent tap density. The preparation method of iron phosphate, provided by the invention, dispenses with the treatment of the byproduct salts generated during iron phosphate production from phosphate and an iron salt; the preparation method controls the properties of iron phosphate through a high pressure oxidation process, so as to effectively improve the tap density and other properties; and the preparation method effectively reduces material loss, reduces the phosphorus content in sewage and reduces the difficulty of sewage treatment through rectification, purification and reuse of phosphoric acid, thus achieving the purpose of green production.

Description

Technical field [0001] The invention belongs to the technical field of lithium ion battery cathode materials, and specifically relates to a method for preparing iron phosphate. Background technique [0002] Iron phosphate is also known as high iron phosphate, the English name is iron(iii)phosphate tetrahydrate, and the CAS number is 10045-86-0. [0003] Lithium-ion battery is a new generation of green high-energy battery, with many advantages such as high voltage, high energy density, good cycle performance, small self-discharge, no memory effect, wide operating temperature range, etc. It is widely used in mobile phones, notebook computers, and digital cameras. , Camcorders, electronic meters, etc., also have bright application prospects in UPS, power tools, electric bicycles, electric cars, energy storage batteries and other fields. In recent years, the output of lithium-ion batteries has grown rapidly, and their application fields have been expanding. They have become high-tech ...

Claims

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Application Information

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IPC IPC(8): C01B25/37
CPCC01B25/375C01P2004/61C01P2006/11
Inventor 郑铁江蒋国强曹圣平俞晔虎马俊华姜科技肖春生陶植唐义
Owner NANTONG BAICHUAN NEW MATERIAL CO LTD
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