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Ce-NiO-coated Ni-MOF composite material as well as preparation method and application thereof

A composite material and a technology for preparation steps, applied in the field of materials, can solve the problems of poor conductivity and unsatisfactory results, and achieve the effects of high specific surface area, improved electrochemical performance, and changed electronic structure

Active Publication Date: 2020-09-25
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, NiO has made considerable progress in the application of high-performance electrochemical supercapacitors, but the results obtained so far are still unsatisfactory due to poor electrical conductivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A Ce-NiO@Ni-MOF composite material is prepared by the following steps:

[0032] 1mmol Ce(NO 3 ) 3 ·6H 2 O, 8mmol Ni(NO 3 ) 2 ·6H 2 O and 10 mmol C 2 h 2 o 4 2H 2 Dissolve O in 50mL ethanol, stir magnetically at 400r / min for 1h, transfer to an autoclave for hydrothermal reaction, the temperature of hydrothermal reaction is 140°C, the time is 6h, after cooling to room temperature, wash with ethanol , and then vacuum-dried at 80°C for 24 hours to obtain an intermediate product; the dried intermediate product was calcined at a high temperature in an air atmosphere at a temperature of 350°C for 2 hours to obtain Ce-NiO; 0.075g Dissolve 1,3,5-trimethanesulfonic acid in 0.3g DMF, then add 0.3g Ce-NiO to the above solution, stir it with magnetic force at a speed of 450r / min for 1h, transfer it to an autoclave, and conduct hydrothermal Reaction, the hydrothermal reaction temperature is 120 °C, the temperature is 10 h, after natural cooling to 30 °C, ultrasonic washing ...

Embodiment 2

[0035] A Ce-NiO@Ni-MOF composite material is prepared by the following steps:

[0036] 1mmol Ce(NO 3 ) 3 ·6H 2 O, 5mmol Ni(NO 3 ) 2 ·6H 2 O and 10 mmol C 2 h 2 o 4 2H 2 Dissolve O in 50mL ethanol, stir magnetically at 400r / min for 1h, transfer to an autoclave for hydrothermal reaction, the temperature of hydrothermal reaction is 140°C, the time is 6h, after cooling to room temperature, wash with ethanol , and then vacuum-dried at 80°C for 24 hours to obtain an intermediate product; the intermediate product obtained by drying was calcined at a high temperature in an air atmosphere at a temperature of 350°C and for 2 hours to obtain Ce-NiO; 0.075 Dissolve g 1,3,5-trimethanesulfonic acid in 0.3g DMF, then add 0.3g Ce-NiO to the above solution, stir magnetically at a speed of 400r / min for 1h, then transfer to an autoclave for hydrothermal reaction, the hydrothermal reaction temperature is 120 ° C, the time is 10 h, after natural cooling to 30 ° C, ultrasonic washing with...

Embodiment 3

[0039] A Ce-NiO@Ni-MOF composite material is prepared by the following steps:

[0040] 1mmol Ce(NO 3 ) 3 ·6H 2 O, 8mmol Ni(NO 3 ) 2 ·6H 2 O and 8 mmol C 2 h 2 o 4 2H 2 Dissolve O in 50mL ethanol, stir magnetically at 400r / min for 1h, transfer to an autoclave for hydrothermal reaction, the temperature of hydrothermal reaction is 140°C, the time is 6h, after cooling to room temperature, wash with ethanol , and then vacuum-dried at 80°C for 24 hours to obtain an intermediate product; the intermediate product obtained by drying was calcined at a high temperature in an air atmosphere at a temperature of 350°C and for 2 hours to obtain Ce-NiO; 0.075 Dissolve g 1,3,5-trimethanesulfonic acid in 0.3g DMF, then add 0.3g Ce-NiO to the above solution, stir magnetically at a speed of 400r / min for 1h, then transfer to an autoclave for hydrothermal Reaction, the hydrothermal reaction temperature is 120 °C, the time is 10 h, after natural cooling to 30 °C, ultrasonic washing with DM...

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PUM

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Abstract

The invention relates to a Ce-NiO-coated Ni-MOF composite material and a preparation method and application thereof. The preparation method comprises the following preparation steps of S1, dissolvinga nickel source, a cerium source and oxalic acid in an organic solvent, carrying out a hydrothermal reaction after even mixing, and obtaining an intermediate product after cooling, washing and dryingare conducted; S2, calcining the intermediate product obtained in the step S1 to obtain Ce-NiO; S3, adding the Ce-NiO obtained in the step S2 into a mixed solution of 1, 3, 5-trimethanesulfonic acid and DMF (Dimethyl Formamide), uniformly stirring, then carrying out hydrothermal reaction, and then cooling, washing and drying to obtain the Ce-NiO coated Ni-MOF composite material. Compared with theprior art, the Ce-NiO-coated Ni-MOF composite material has high intrinsic conductivity, high specific capacitance, high conductivity and better cycling stability, the raw materials adopted in the preparation method are pollution-free, and a solvent generated in the preparation process is non-toxic.

Description

technical field [0001] The invention relates to the field of materials, in particular to a Ce-NiO@Ni-MOF composite material and a preparation method and application thereof. Background technique [0002] In today's research-oriented technological world, the demand for devices with large energy storage capacity, low cost and eco-friendliness is increasing. Lithium Ion Batteries (LIBs) and SuperCapacitors (SCs) are considered to be the most promising energy storage technologies. Among them, lithium-ion batteries are based on a high-energy and high-density mass charge storage mechanism, which makes them potential candidates for applications such as hybrid vehicles, power backup systems, and computer backups, but lithium-ion batteries have low power density and cycle instability. , high manufacturing costs and other deficiencies. Supercapacitors have significant advantages such as high power density, long cycle life, fast charging and discharging speed, good reliability, good ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/30H01G11/36H01G11/46H01G11/86
CPCH01G11/26H01G11/30H01G11/36H01G11/46H01G11/86Y02E60/13
Inventor 韩生胡晓敏刘顺昌王露露丛海山蒋继波孙瑶馨陈宇凯
Owner SHANGHAI INST OF TECH
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