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A carbon-doped double metal oxide material and its preparation method

A bimetallic oxide and high-temperature carbonization technology, which is applied in the field of nanomaterials, can solve problems such as poor cycle stability of transition metal oxides, small ion or electron diffusion coefficients, and reduced reversibility of electrode reactions, so as to enhance charge and discharge performance, Low cost, enhanced conductivity

Active Publication Date: 2021-05-11
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are three main reasons for the poor cycle stability of transition metal oxides: the first is poor conductivity, the diffusion coefficient of ions or electrons is not large, which reduces the reversibility of the electrode reaction, and the capacity decays quickly during cycling; the second is that transition metal oxide materials Repeated reaction with Li produces pulverization, the electrical contact between the active particles, the collective flow and the active particles is lost, and the particles that lose contact no longer participate in the electrode reaction, and the capacity decays; the third is the transition metal oxide material and Li The reaction produces metal nanoparticles, which agglomerate after many cycles, from less active material to capacity fading

Method used

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  • A carbon-doped double metal oxide material and its preparation method
  • A carbon-doped double metal oxide material and its preparation method
  • A carbon-doped double metal oxide material and its preparation method

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Embodiment 1

[0025] The raw material formula of carbon-doped double metal oxide material is as follows:

[0026]

[0027] Above-mentioned composite material is prepared by the preparation method of following steps:

[0028] A method for preparing a carbon-doped double metal oxide material, the method comprising the following steps: first heating ferric chloride hexahydrate, nickel chloride hexahydrate, ammonium chloride, gelatin and deionized water to 80°C, fully dissolving Stir evenly, then pour it into a watch glass, and dry it in vacuum at 60°C; then put the dry gel into a quartz boat, place the quartz boat in a tube furnace and heat it under a nitrogen atmosphere with a nitrogen flow rate of 50ml / min. The rate is 5°C / min, slowly heating from room temperature to 300°C, and the carbonization time is 2h; then the hydrochloric acid is prepared into 10ml of 1M solution, etched for 3h, and the carbonized material is cleaned, vacuum-dried at 60°C after suction filtration. Then, the sample...

Embodiment 2

[0032] The raw material formula of carbon-doped double metal oxide material is as follows:

[0033]

[0034]

[0035] Above-mentioned composite material is prepared by the preparation method of following steps:

[0036] A method for preparing a carbon-doped double metal oxide material, the method comprising the following steps: first heating ferric chloride hexahydrate, nickel chloride hexahydrate, ammonium chloride, gelatin, etc. and 10ml deionized water to 85°C, Fully dissolve and stir evenly, then pour into a watch glass, and dry under vacuum at 60°C; then put the dry gel into a quartz boat, place the quartz boat in a tube furnace and heat it under a nitrogen atmosphere with a nitrogen flow rate of 50ml / min , the heating rate was 5°C / min, slowly heated from room temperature to 400°C, and the carbonization time was 2h; then the hydrochloric acid was prepared into a 1M solution, 10ml was etched for 3h, and the carbonized material was cleaned, vacuum-dried at 60°C after ...

Embodiment 3

[0040] The raw material formula of carbon-doped double metal oxide material is as follows:

[0041]

[0042] Above-mentioned composite material is prepared by following steps preparation method:

[0043]A method for preparing a carbon-doped double metal oxide material, the method comprising the following steps: first heating ferric chloride hexahydrate, nickel chloride hexahydrate, ammonium chloride, gelatin and 10ml deionized water to 80°C, Fully dissolve and stir evenly, then pour into a watch glass, and dry under vacuum at 60°C; then put the dry gel into a quartz boat, place the quartz boat in a tube furnace and heat it under a nitrogen atmosphere with a nitrogen flow rate of 50ml / min , the heating rate was 5°C / min, slowly heated from room temperature to 350°C, and the carbonization time was 2h; then the hydrochloric acid was prepared into a 1M solution, 10ml was etched for 3h, and the carbonized material was cleaned, vacuum-dried at 60°C after suction filtration. Then,...

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Abstract

The invention discloses a carbon-doped double metal oxide material and a preparation method thereof. The preparation method of the present invention comprises the following steps: (1) heating and mixing ferric chloride hexahydrate, nickel chloride hexahydrate, ammonium chloride, gelatin and deionized water and then drying; (2) drying the After drying, the sample is carbonized at a low temperature under an inert atmosphere. After the low-temperature carbonization, the sample is soaked and etched with hydrochloric acid with a concentration of 0.8-2mol / L, and then dried by suction filtration; (3) The dried sample is carbonized at a high temperature under an inert atmosphere. After high-temperature carbonization, the sample was soaked and etched with hydrochloric acid with a concentration of 0.1-0.5mol / L, and then filtered and dried to obtain a carbon-doped double metal oxide material. The invention has low raw material cost and simple preparation method, and the obtained carbon-doped double metal oxide material has high specific surface area and relatively uniform pore size distribution, and has good application prospects in the fields of toxic gas adsorption and lithium batteries.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to a carbon-doped double metal oxide material and a preparation method thereof. Background technique [0002] Carbon materials are widely used as electrodes of lithium batteries, because carbon materials are easy to obtain, easy to process, large surface area and porosity, low resistivity, good surface chemical environment and physical and chemical properties, and low cost. Energy storage is mainly carried out on the surface of carbon material electrodes and electrolytes. Porous carbon materials are widely used in modern science due to their unique properties and abundant and easy-to-obtain synthetic raw materials. Porous carbon materials have a series of characteristics such as high chemical stability, acid and alkali resistance, high temperature resistance, electrical conductivity, and thermal conductivity. Such materials usually have developed pores, high specific surf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/52H01G11/24H01G11/32H01G11/46B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/32H01G11/46H01M4/523Y02E60/10
Inventor 蒋继波朱丽莹陈浩天常宾孙瑶馨韩生黄燕山
Owner SHANGHAI INST OF TECH
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