Precursor of positive electrode material, positive electrode material and preparation method thereof, lithium ion battery positive electrode, lithium ion battery and electrical equipment

A technology for lithium-ion batteries and positive electrode materials, applied in lithium-ion batteries and electrical equipment, positive electrode material precursors, positive electrode materials and their preparation, lithium-ion battery positive electrodes, can solve problems such as poor cycle stability, and achieve effective Benefits of diffusion transmission, cost reduction, and simple preparation process

Active Publication Date: 2021-09-17
湖南桑瑞新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Conventional high voltage spinel lithium nickel manganese oxide LiNi 0.5 mn 1.5 o 4 It has a three-dimensional tunnel structure of 8a-16c-8a, which is conducive to the diffusion of lithium ions, making it a great advantage as a cathode material for lithium-ion batteries, but it also has the problem of poor cycle stability

Method used

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  • Precursor of positive electrode material, positive electrode material and preparation method thereof, lithium ion battery positive electrode, lithium ion battery and electrical equipment
  • Precursor of positive electrode material, positive electrode material and preparation method thereof, lithium ion battery positive electrode, lithium ion battery and electrical equipment
  • Precursor of positive electrode material, positive electrode material and preparation method thereof, lithium ion battery positive electrode, lithium ion battery and electrical equipment

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Embodiment 1

[0086] This embodiment provides a method for preparing a positive electrode material precursor and the precursor:

[0087] Dissolve nickel sulfate and manganese sulfate with deionized water to obtain solutions with concentrations of 1.6mol / L and 0.2mol / L respectively, and mix the two solutions evenly to obtain nickel-manganese mixed salt solution; use deionized water for ammonium ferric oxalate Dissolve to obtain a 0.2mol / L solution, add polyvinyl alcohol to form an iron solution, wherein the molar ratio of nickel ions, manganese ions, and iron ions in the solution of nickel sulfate, manganese sulfate, and ferric ammonium oxalate is 0.80:0.1:0.1, polyethylene The quality of alcohol is 1% of the ferric ammonium oxalate solution quality; Prepare 2.0mol / L ammonia solution and 12.0mol / L sodium hydroxide solution;

[0088] The above four filtered solutions are added into the reaction kettle with a rotation speed of 200r / min in parallel according to the flow rate of 1mL / min, and the...

Embodiment 2

[0093] This embodiment provides a method for preparing a positive electrode material precursor and the precursor:

[0094] Dissolve nickel sulfate and manganese sulfate with deionized water to obtain solutions with concentrations of 1.8mol / L and 0.1mol / L respectively, and mix the two solutions evenly to obtain nickel-manganese mixed salt solution; use deionized water for ammonium ferric oxalate Dissolve to obtain a 0.1mol / L solution, add polyvinyl alcohol to form an iron solution, wherein the molar ratio of nickel ions, manganese ions, and iron ions in the solution of nickel sulfate, manganese sulfate, and ferric ammonium oxalate is 0.90:0.05:0.05, polyethylene The quality of alcohol is 2% of the ferric ammonium oxalate solution quality; The ammonia solution of 1.0mol / L, the sodium hydroxide solution of 13.0mol / L are configured;

[0095] The above four filtered solutions are added into the reactor with a rotation speed of 250r / min according to the flow rate of 20mL / min, and th...

Embodiment 3

[0100] This embodiment provides a method for preparing a positive electrode material precursor and the precursor:

[0101] Dissolve nickel nitrate and manganese nitrate with deionized water to obtain solutions with concentrations of 1.8mol / L and 1.1mol / L respectively, and mix the two solutions evenly to obtain nickel-manganese mixed salt solution; use deionized water for ferric ammonium oxalate Dissolve to obtain a 0.09mol / L solution, add lauric acid to form an iron solution, wherein the molar ratio of nickel ions, manganese ions, and iron ions in the nickel, manganese, and iron salt solution is 0.6:0.37:0.03, and the quality of lauric acid is oxalic acid 1.5% of the mass of ferric ammonium solution; configure 0.9mol / L ammonia solution and 10.0mol / L sodium hydroxide solution;

[0102] The above four filtered solutions are added into the reaction kettle with a rotation speed of 300r / min according to the flow rate of 10mL / min, and the flow rate of the sodium hydroxide solution i...

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Abstract

The invention provides a positive electrode material precursor, a positive electrode material and a preparation method thereof, a positive electrode of a lithium ion battery, a lithium ion battery and electrical equipment. A positive electrode material precursor, the molecular formula of the positive electrode material precursor is Ni x mn y Fe z (OH) 2 . The preparation method of the positive electrode material precursor: mixing raw materials including nickel source, manganese source, ferric ammonium oxalate and precipitant to form a mixed solution, and reacting to obtain the positive electrode material precursor. Cathode material, its molecular formula is Li 1+ n Ni x mn y Fe z o 2 . The preparation method of the positive electrode material: mixing the positive electrode material precursor and the lithium source, and then sintering in an oxygen-containing atmosphere to obtain the positive electrode material. The positive electrode of lithium ion battery is made of positive electrode material. A lithium-ion battery includes the positive electrode of the lithium-ion battery. The electrical equipment includes the lithium-ion battery. The lithium battery made of the cathode material provided by the application has excellent chemical stability and electrical performance.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a positive electrode material precursor, a positive electrode material and a preparation method thereof, a lithium ion battery positive electrode, a lithium ion battery and electrical equipment. Background technique [0002] Although new energy vehicles have been gradually accepted by consumers in recent years, there are still two major concerns that have been difficult to resolve. One is the anxiety about the mileage of the power battery of new energy vehicles, and the other is the concern about the high popularity of new energy vehicles compared with fuel vehicles. The price of energy vehicles is troubled, which is why electric vehicles cannot be promoted quickly at present. Therefore, it has become an urgent need to reduce costs and develop power lithium-ion battery materials with high energy density and high output power. [0003] For a new energy vehicle, one of the maj...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525H01M4/131H01M10/0525C01G53/00
CPCC01G53/006C01G53/50C01P2002/72C01P2004/03C01P2004/61C01P2006/40H01M4/131H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 刘双祎邓多罗桂唐泽勋商士波
Owner 湖南桑瑞新材料有限公司
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