Lithium-rich manganese-based anode material, preparation method thereof and lithium ion battery containing anode material

A lithium-rich manganese-based, cathode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of uncontrollable material morphology, particle size and precise chemical composition, to improve efficiency and operability, The effect of simplifying the process flow and saving washing water

Active Publication Date: 2017-06-30
CHINA AUTOMOTIVE BATTERY RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a lithium-rich manganese-based positive electrode material, which solves the problem of uncontrollable material morphology, particle size and precise chemical composition by improving the process

Method used

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  • Lithium-rich manganese-based anode material, preparation method thereof and lithium ion battery containing anode material
  • Lithium-rich manganese-based anode material, preparation method thereof and lithium ion battery containing anode material
  • Lithium-rich manganese-based anode material, preparation method thereof and lithium ion battery containing anode material

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) According to the molecular formula Li 1.2 mn 0.54 Ni 0.13 co 0.11 Al 0.02 o 2 The molar ratio of the transition metal in aluminum acetate, nickel acetate, cobalt acetate and manganese acetate is configured so that the total transition metal ion concentration is 1.0mol L -1 The mixed solution of Al: Co: Ni: Mn = 0.025: 0.140: 0.165: 0.67; the configuration is 1.0mol L -1 oxalic acid solution, configure 1mol L -1 NH 4OH solution, the three solutions are dripped into the constantly stirring reactor at the same time at a certain flow rate; the reaction conditions are controlled: the temperature is 60°C, the stirring speed is 1200rpm, and the co-precipitation reaction time is 10h;

[0034] (2) Adjust the solid concentration of the resulting slurry to 150g / L, and spray dry at 160°C to obtain the precursor Ni 0.165 co 0.140 Al 0.025 mn 0.67 C 2 o 4 2H 2 O;

[0035] (3) keeping the above-mentioned oxalate precursor powder at 320°C for 4 hours, and then raisin...

Embodiment 2

[0041] (1) According to the molecular formula Li 1.16 mn 0.56 Ni 0.16 co 0.08 f 0.02 o 1.98 The molar ratio of the transition metal in nickel acetate, cobalt acetate and manganese acetate is configured so that the total transition metal ion concentration is 1.0mol L -1 The mixed solution, wherein, Ni: Co: Mn = 0.2: 0.1: 0.7; configured as 1.0mol L -1 NH 4 HC 2 h 4 Solution, configure 0.5mol·L -1 NH 4 OH solution; drop the above three solutions into a constantly stirring reactor at a certain flow rate at the same time, and control the reaction conditions: the reaction temperature is 80°C, the stirring speed is 800rpm, and the reaction time is 10h;

[0042] (2) Adjust the solid concentration of the resulting slurry to 250g / L, and spray dry at 170°C to obtain the precursor Ni 0.2 co 0.1 mn 0.7 C 2 h 4 2H 2 O;

[0043] (3) heat the above precursor powder at 200°C for 4 hours, then raise the temperature to 400°C for 3 hours to obtain the oxide precursor;

[0044] ...

Embodiment 3

[0048] (1) According to the molecular formula Li 1.167 mn 0.533 Ni 0.2 co 0.1 o 2 The molar ratio of the transition metal in nickel acetate, cobalt acetate and manganese acetate is configured so that the total transition metal ion concentration is 1.0mol L -1 The mixed solution of Ni:Co:Mn=0.24:0.12:0.64, the configuration is 1.0mol L -1 of (NH 4 ) 2 C 2 h 4 Solution, configure 4mol·L -1 NH 4 OH solution; drop the above three solutions into a constantly stirring reactor at a certain flow rate at the same time, and control the reaction conditions: the reaction temperature is 30°C, the stirring speed is 400rpm, and the reaction time is 4h;

[0049] (2) Adjust the solid concentration of the obtained slurry to 300g / L, and spray dry at 180°C to obtain the precursor Ni 0.24 co 0.12 mn 0.64 C 2 h 4 .2H 2 O;

[0050] (3) keeping the above precursor powder at 150°C for 4 hours, then raising the temperature to 450°C for 3 hours to obtain the oxide precursor;

[0051] (...

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Abstract

The invention discloses a lithium-rich manganese-based anode material, a preparation method thereof and a lithium ion battery containing the anode material. A chemical formula of the lithium-enrichment manganese-based anode material is Li1+xMnyMzAwOr, wherein the M is at least one of Ni, Co, Al, Mg, Ti, Fe, Cu, Cr, Mo, Zr, Ru and Sn; the A is at least one of S, P, B and F; the x is larger than 0 and smaller than or equal to 1, the y is larger than 0 and smaller than or equal to 1, the z is larger than or equal to 0 and smaller than 1, the w is larger than or equal to 0 and smaller than or equal to 0.2, and the r is larger than or equal to 1.8 and smaller than or equal to 3. The lithium-enrichment manganese-based anode material is prepared by methods of oxalate coprecipitation, spray drying and high-temperature roasting. The lithium-enrichment manganese-based anode material disclosed by the invention overcomes agglomeration of a material prepared through an oxalate coprecipitation method; a prepared material is controllable in particle size, meets requirements of engineering indexes and can achieve the purpose that transition metal ions are evenly mixed at an atom level; the particle size of the prepared lithium-enrichment manganese-based anode material is 3 to 25mu m, and the lithium-rich manganese-based anode material has good rate capability and circulation performance at the same time; furthermore, the lithium-enrichment manganese-based anode material has the advantages of simple preparation technology, low cost and wide application prospect.

Description

technical field [0001] The invention relates to a lithium-rich manganese-based positive electrode material, a preparation method thereof and a lithium ion battery containing the positive electrode material, belonging to the field of lithium ion battery positive electrode materials and their preparation. Background technique [0002] As a new type of high-energy green battery, lithium-ion batteries are widely used in portable electronic products such as notebook computers and mobile phones, and are expanding to large and medium-sized energy storage equipment and new energy electric vehicles. This has a great impact on the energy density of lithium-ion batteries. , cycle life, cost and safety put forward higher requirements. Cathode materials are an important part of lithium-ion batteries, accounting for about 30%-40% of the total cost of the entire battery. Therefore, improving the performance and reducing the cost of cathode materials is extremely critical for the developme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M10/0525H01M4/525
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 高敏庄卫东王振尧尹艳萍卢世刚张超
Owner CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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