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High-specific-capacity metal organic negative electrode material of secondary ion battery and preparation method thereof

A secondary ion, metal-organic technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve the problems of low mass specific capacity, poor Coulomb efficiency and electrochemical cycle performance, and achieve a simple synthesis method and stable electrochemical performance. The effect of cycle performance and low production cost

Active Publication Date: 2016-11-16
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a metal-organic negative electrode material for a secondary ion battery with high specific capacity and a preparation method thereof, which can effectively solve the problems of low mass specific capacity, poor Coulombic efficiency and poor electrochemical cycle performance, etc. , and at the same time effectively combine metals and organics for simultaneous energy storage, and prepare a metal-organic anode material for secondary batteries with high mass specific capacity

Method used

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  • High-specific-capacity metal organic negative electrode material of secondary ion battery and preparation method thereof
  • High-specific-capacity metal organic negative electrode material of secondary ion battery and preparation method thereof
  • High-specific-capacity metal organic negative electrode material of secondary ion battery and preparation method thereof

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Embodiment 1

[0030] A metal-organic negative electrode material for a high specific capacity secondary ion battery, the preparation method comprising the following steps:

[0031] (1) Weigh 1.66 g of terephthalic acid with a purity of 99%, 0.85 g of analytically pure LiOH·H 2 O and 2.14gSnSO 4 , mixed, and then added to a beaker containing 40 mL of absolute ethanol, and ultrasonically stirred for 1 h;

[0032] (2) transferring the reaction solution obtained in step (1) into a polytetrafluoroethylene liner, and sealing it in a reaction kettle, and placing it at 110° C. to react for 12 hours to obtain a mixed solution containing light green stannous terephthalate precipitation;

[0033] (3) The mixed solution obtained in step (2) was washed 3-4 times with deionized water and absolute ethanol respectively, and then centrifuged, and the solid obtained by centrifugation was placed in a constant temperature drying oven at 80 ° C to dry for 6 hours, and ground to obtain light green Tin terephth...

Embodiment 2

[0038] A metal-organic negative electrode material for a high specific capacity secondary ion battery, the preparation method comprising the following steps:

[0039] (1) Weigh 0.83g of 99% pure phthalic acid, 0.43g of analytically pure LiOH·H 2 O and 1.07gSnSO 4 , mixed, and then added to a beaker containing 40 mL of absolute ethanol, and ultrasonically stirred for 1 h;

[0040] (2) transferring the reaction solution obtained in step (1) into a polytetrafluoroethylene liner, and sealing it in a reaction kettle, and placing it at 110° C. to react for 12h to obtain a mixed solution containing light yellow stannous phthalate precipitation;

[0041] (3) The mixed solution obtained in step (2) was washed 3-4 times with deionized water and absolute ethanol, respectively, and then centrifuged, and the solid obtained by centrifugation was placed in a constant temperature drying oven at 80 ° C to dry for 6 hours, and ground to obtain light yellow Stannous phthalate (Sn(1,2-bdc)).

[...

Embodiment 3

[0046] Using the stannous terephthalate prepared in Example 1 as a negative electrode material to assemble a sodium ion battery, the steps are as follows: an electrode sheet is made of stannous terephthalate, which is used as a negative electrode material for the sodium ion battery, and half-cell assembly is performed, The mass ratio of active material, acetylene black and PVDF (solvent is N-methylpyrrolidone) is 6:3:1, metal lithium is the counter electrode, glass fiber membrane is the diaphragm, and the electrolyte is 1mol / L NaPF 6 Dissolved in a mixed solution of EC (ethylene carbonate), DMC (dimethyl carbonate) and FEC (fluoroethylene carbonate) in a volume ratio of 1:1:1, the assembled battery was tested for cycle performance, and the current The density is 60mA / g, see the test results Figure 7 .

[0047] Depend on Figure 7 It can be seen that the discharge specific capacity in the first week is 548.9mAh / g, the charging mass specific capacity is 397.9mAh / g, the chargi...

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Abstract

The invention provides a high-specific-capacity metal organic negative electrode material of a secondary ion battery. A preparation method of the metal organic negative electrode material comprises the following steps: (1) mixing carboxylic acid containing a benzene ring, LiOH.H2O and metal salt according to the mol ratio of (0.8-1.2) to (0.5-1) to (0.25-1); then dissolving the mixture into absolute ethyl alcohol and ultrasonically stirring for 1h to 1.5h; (2) sealing a reaction solution obtained by the step (1) at 110 DEG C to 120 DEG C and reacting for 12h to 14h; and (3) washing a reactant obtained by the step (2) with de-ionized water and the absolute ethyl alcohol for 3-4 times respectively, centrifuging, drying an obtained solid at 70 DEG C to 80 DEG C for 6h to 8h and milling to obtain the product. By adopting organic salt formed by synthesizing metal salt and organic matters, organic energy storage and inorganic energy storage can be combined together, so that the prepared negative electrode material has a high specific capacity, high coulomb efficiency and excellent electrochemical circulating performance.

Description

technical field [0001] The invention belongs to the technical field of secondary ion batteries, and in particular relates to a metal-organic negative electrode material for a high specific capacity secondary ion battery and a preparation method thereof. Background technique [0002] With the advancement of science and technology and the development of society, human beings have higher and higher requirements for the environment and energy. Most of the energy currently used by humans comes from fossil energy. With the massive consumption of coal and oil, the problems of energy crisis and environmental pollution have become increasingly prominent, which seriously affects the sustainable development of human beings and the earth. Governments all over the world have gradually realized the urgency and necessity of developing renewable energy. The United States, Japan and other countries are actively promoting the development of renewable energy. At the same time, energy storag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/60H01M10/0525H01M10/054
CPCH01M4/60H01M10/0525H01M10/054Y02E60/10
Inventor 王丽平赵明娟邹剑李晶泽
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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