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High-performance lithium ferric manganese phosphate positive electrode material and operation method thereof

A technology of lithium iron manganese phosphate and positive electrode materials, which is applied in the direction of chemical instruments and methods, battery electrodes, phosphorus compounds, etc., can solve the problems of simple synthesis process of lithium iron manganese phosphate, uneven particle size, and influence on electrical conductivity, and achieve The synthesis process is concise and clear, the reaction is sufficient, and the encapsulation effect is good

Pending Publication Date: 2022-04-29
ZHONGKE LITHIUM BATTERY NEW ENERGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a high-performance lithium iron manganese phosphate positive electrode material and an operation method to solve the problems that the uneven particle size affects the electrical conductivity and the simple synthesis process of iron manganese lithium phosphate proposed in the above-mentioned background technology

Method used

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  • High-performance lithium ferric manganese phosphate positive electrode material and operation method thereof
  • High-performance lithium ferric manganese phosphate positive electrode material and operation method thereof

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Embodiment 1

[0040] A high-performance lithium iron manganese phosphate cathode material, comprising raw materials of the following components:

[0041] Main raw materials: lithium hydroxide, ferrous sulfate, manganese sulfate and phosphoric acid; auxiliary raw materials: graphene, deionized water and nitrogen.

[0042] A method for synthesizing a high-performance lithium iron manganese phosphate positive electrode material, comprising the following steps:

[0043] S1. Weighing: Weigh lithium hydroxide, ferrous sulfate, manganese sulfate, phosphoric acid and graphene in the main raw materials on the weighing equipment, lithium hydroxide, ferrous sulfate, manganese sulfate and phosphoric acid in molar ratio Li:Fe :Mn:P=3:0.5:0.6:1 for weighing;

[0044] S2. Grinding: Lithium hydroxide, ferrous sulfate, manganese sulfate, phosphoric acid and graphene are respectively placed in a tetrafluoroethylene grinder, and grinding media are added for preliminary grinding until powdered;

[0045] S3. ...

Embodiment 2

[0054] A high-performance ammonium dihydrogen phosphate iron manganese lithium positive electrode material, including the raw materials of the following components:

[0055] Main raw materials: lithium carbonate, ferrous oxalate, manganese carbonate and ammonium dihydrogen phosphate; auxiliary raw materials: glucose, deionized water and helium.

[0056] A method for synthesizing high-performance ammonium dihydrogen phosphate iron manganese lithium cathode material, comprising the following steps:

[0057] S1. Weighing: Weigh lithium carbonate, ferrous oxalate, manganese carbonate, ammonium dihydrogen phosphate and glucose in the main raw materials on the weighing equipment, lithium carbonate, ferrous oxalate, manganese carbonate and ammonium dihydrogen phosphate in molar ratio Li:Fe:Mn:P=2.5:0.4:0.7:1 for weighing;

[0058] S2. Grinding: Lithium carbonate, ferrous oxalate, manganese carbonate, ammonium dihydrogen phosphate and glucose are respectively placed in a tetrafluoroe...

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Abstract

The invention relates to the technical field of lithium ion batteries, in particular to a high-performance lithium ferric manganese phosphate positive electrode material and an operation method, and the high-performance lithium ferric manganese phosphate positive electrode material comprises the following raw materials: main raw materials: a lithium source material, an iron source material, a manganese source material and a phosphorus source material; auxiliary raw materials: a carbon source material, deionized water and protective gas; the lithium source substance in the main raw materials is one of lithium hydroxide and lithium carbonate, the iron source substance in the main raw materials is one of ferrous sulfate, ferrous oxalate, ferric oxide, iron carbonate, iron oxide and ferric nitrate, and the manganese source substance in the main raw materials is one of manganese sulfate, manganese carbonate, manganese oxide, manganese oxalate and manganese acetate. The phosphorus source in the main raw materials is one of phosphoric acid, ammonium dihydrogen phosphate and diammonium hydrogen phosphate. According to the method, the raw materials are ground before the lithium ferric manganese phosphate is prepared, so that the lithium ferric manganese phosphate material is finer and more uniform, and the lithium ferric manganese phosphate powder is more uniform and more excellent in electrochemical performance through a mesh sieve.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a high-performance lithium iron manganese phosphate cathode material and an operation method. Background technique [0002] Since the development of lithium-ion batteries, lithium cobaltate, lithium manganate, lithium iron phosphate and ternary materials are commonly used in the market as cathode materials, among which lithium iron phosphate and ternary materials account for more than 90% of the market share. Ternary materials have been extensively studied because of their high specific capacity, high tap density and ultra-high energy density. [0003] Chinese Patent No. CN201010527962.4 provides a lithium-ion battery anode material lithium iron manganese phosphate and its preparation method, including the following steps: Precursor synthesis: put the raw material in a container, add a dispersant, at a speed of 1000-2500r / min Grind and disperse for 1-3 hours, dry a...

Claims

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Application Information

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IPC IPC(8): C01B25/45H01M4/58
CPCC01B25/45H01M4/5825
Inventor 王永禄
Owner ZHONGKE LITHIUM BATTERY NEW ENERGY CO LTD
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