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A kind of rod-shaped double metal oxide material and its preparation method

A double metal oxide, rod-shaped technology, applied in the direction of electrochemical generators, structural parts, electrical components, etc., can solve the problems of material structure collapse, rapid capacity decay, short cycle life, etc., to reduce mass transfer resistance and shorten reaction time period, reducing the effect of volume change

Active Publication Date: 2020-03-31
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to research, although transition metal oxides can obtain a high initial charge-discharge capacity, however, as the number of cycles increases, the structure of the material is prone to collapse and large volume changes, resulting in rapid capacity decay and short cycle life.

Method used

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  • A kind of rod-shaped double metal oxide material and its preparation method
  • A kind of rod-shaped double metal oxide material and its preparation method
  • A kind of rod-shaped double metal oxide material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) 0.6mmol CoCl 2 ·6H 2 O, 0.6mmol NiCl 2 ·6H 2 O. Add 0.6mmol 1,4-cyclohexanedioic acid and 0.6mmol 1,10-PHen into 16mL water, and sonicate for 20min;

[0031] 2) adjust the pH value of the above solution to 7 with a NaOH solution whose concentration is 6mol / L;

[0032] 3) Transfer the above solution to a 50mL polytetrafluoroethylene kettle, heat it with a microwave reactor, and react at the optimal temperature of 150°C for 30min;

[0033] 4) After the reaction, the solution was naturally cooled to room temperature, centrifuged at 7000r / min, washed with ethanol and water for 3 times, and then vacuum-dried at 60°C to constant weight to obtain a rose-colored powder;

[0034] 5) Calcining the obtained rose-colored powder in the air to obtain a black powder, which is the bimetallic oxide material B1 with a rod-like structure, the calcination temperature is 600°C, the calcination time is 2h, and the heating rate is 2°C / min

example 1

[0035] The test results of Example 1 are as follows:

[0036] (1) By performing X-ray diffraction spectrum detection on the precursor of B1, the results are shown in figure 1 ,Will figure 1 Compared with the crystal diffraction data, it can be seen that the synthesized precursor MOFs material is basically consistent with the crystal diffraction data, which preliminarily shows that the prepared MOFs are materials containing both Ni and Co metals. The molecular formula of the material is [M 2 (PHen) 2 (e,a-cis-1,4-chdc) 2 (H 2 O) 2 ] n , wherein M=Co, Ni, PHen=1,10-PHenanthroline, chdc=cyclohexanedicarboxylate;

[0037] (2) By carrying out X-ray diffraction spectrum detection on B1, the results are shown in figure 2 , by comparison, it can be seen that the material is compatible with NiO (PDF#47-1049) and NiCo 2 o 4 (PDF#20-0718) The diffraction peaks are consistent, indicating that the material is NiO-NiCo 2 o 4 ;

[0038] (3) Through the scanning electron microsco...

Embodiment 2

[0043] Prepare the NiO-NiCo of rod-like structure according to the method for embodiment 1 2 o 4 Material B2, the different steps are 1) with 0mmol CoCl 2 ·6H 2 O, 0.6mmol NiCl 2 ·6H 2 O, 0.6mmol of 1,4-cyclohexanedioic acid and 0.6mmol of 1,10-PHen were added to 16mL of water, and sonicated for 30min;

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Abstract

The invention discloses a rod-shaped double metal oxide material with excellent electrochemical performance and a preparation method thereof. The precursor MOFs material of the bimetallic oxide has regular shape and uniform size, and the bimetallic oxide obtained after calcination at a certain temperature in the air atmosphere retains the morphology and structural characteristics of the precursor well, and the rod-like morphology makes the bimetallic oxide When the material is used as the negative electrode material of lithium-ion batteries, it is more conducive to the transmission of lithium ions, thus showing better electrochemical performance compared with traditional graphite electrodes. Industrial production is of great significance.

Description

technical field [0001] The invention relates to a rod-shaped double metal oxide with excellent electrochemical performance. Specifically, the material uses MOFs as a precursor to form a uniform rod-shaped structure and its application in electrochemical aspects belongs to the technical field of chemical application. Background technique [0002] With the deepening of informatization, fossil fuels are rapidly consumed and exhausted, and the energy crisis has surfaced. People's demand for low-cost, green and environmentally friendly energy is increasing day by day. In recent years, renewable new energy sources such as wind energy, water energy, ocean energy, tidal energy, solar energy, etc. have gradually attracted widespread attention of scientific researchers, but these energy sources are dependent on the unreliability of nature, and the energy is intermittent and cannot be directly applied to the grid. Therefore, it is crucial to find a reliable, simple, fast and sustainab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/525H01M10/0525
CPCH01M4/525H01M10/0525Y02E60/10
Inventor 陈金喜刘诗新
Owner SOUTHEAST UNIV
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