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N-doped porous carbon coated Mn-Co-Ni oxide core-shell structure electrode material and preparation method and application thereof

A mn-co-ni, core-shell structure technology, applied in battery electrodes, structural parts, circuits, etc., to achieve the effect of increasing volume expansion

Pending Publication Date: 2022-05-13
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] According to literature reports, the synthesized multi-component transition metal oxide electrode materials are limited to multi-shelled Mn-Co-Ni transition metal oxide hollow microspheres (ACS Nano 2017, 11, 11521-11530), and other N-doped porous carbon-coated Mn -Co-Ni oxide core-shell structure electrode materials have not been reported

Method used

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  • N-doped porous carbon coated Mn-Co-Ni oxide core-shell structure electrode material and preparation method and application thereof
  • N-doped porous carbon coated Mn-Co-Ni oxide core-shell structure electrode material and preparation method and application thereof
  • N-doped porous carbon coated Mn-Co-Ni oxide core-shell structure electrode material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] (1) Dissolve manganese nitrate tetrahydrate, cobalt nitrate hexahydrate, and nickel nitrate hexahydrate in a molar ratio of 2:1:1 in 60 mL of deionized water to prepare a solution with a metal ion concentration of 0.5 mol / L.

[0047] (2) Move the solution to an ultrasonic nebulizer for atomization. Under the action of a vacuum pump, the atomized droplets are introduced into a glass tube preheated to 500 °C, and the precursor powder is collected at the other end by a filter device.

[0048] (3) Dissolve 0.08g of powder in 40mL of deionized water, add 4mg of sodium dodecylbenzenesulfonate, ultrasonically disperse for 10min, stir for 1h, add 15μL of pyrrole monomer, stir for 1h, add 12mL of ammonium persulfate to dissolve (concentration 0.1mol / L), stirred for 3 hours, washed with ethanol and deionized water respectively, and finally placed in a vacuum oven at 60°C for 36 hours to obtain the product.

[0049] (4) In an argon atmosphere, the product was heated from room tem...

Embodiment 2

[0051] Carry out according to the method of Example 1, except that 5 μL of pyrrole monomer is added in step (3).

Embodiment 3

[0053] Carry out according to the method of Example 1, except that 25 μL of pyrrole monomer is added in step (3).

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Abstract

The invention discloses a method for preparing an N-doped porous carbon coated Mn-Co-Ni oxide core-shell structure electrode material, which comprises the following steps: (1) dissolving a manganese source, a cobalt source and a nickel source in a solvent I to obtain a mixed solution; (2) performing spray pyrolysis on the mixed solution, and collecting to obtain precursor powder; (3) uniformly mixing the precursor powder, a doping agent, a carbon and nitrogen source and an oxidizing agent in a solvent II, and then performing vacuum drying to obtain a product; and (4) carrying out high-temperature calcination on the product under protective gas to obtain the N-doped porous carbon coated Mn-Co-Ni oxide core-shell structure electrode material. The material has a special core-shell structure and a relatively large specific surface area, is high in specific capacity and good in stability, is beneficial to relieving volume expansion and permeation and diffusion of electrolyte, and is convenient for transmission of lithium ions.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, in particular to an electrode material with an N-doped porous carbon-coated Mn-Co-Ni oxide core-shell structure and a preparation method and application thereof. Background technique [0002] At present, lithium-ion batteries have become an important source of power in portable electronics and high-energy fields such as electric vehicles, hybrid vehicles, and plug-in hybrid vehicles. In order to meet these requirements, energy density, power density, and life expectancy requirements should be further improved. The performance of lithium-ion batteries is mainly determined by the selection of anode and cathode materials with specific morphology and size. Transition metal oxides have shown promise for the development of alternative node materials for lithium secondary batteries, such as CO 3 o 4 , Fe 3 o 4 , MnO 2 , Mn 3 o 4 , MMn 2 o 4 These structures such as (M=Zn, Co, Ni.etc) genera...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62
CPCH01M4/366H01M4/525H01M4/505H01M4/625H01M4/628Y02E60/10
Inventor 耿保友周彦
Owner ANHUI NORMAL UNIV
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