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Preparation method of copper vanadate, the copper vanadate prepared through the method, and application of the copper vanadate in lithium ion batteries

A lithium ion battery, copper vanadate technology, applied in copper vanadate, application in lithium ion battery, copper vanadate preparation field, can solve problems such as being unfavorable to improve the energy density of lithium ion battery, etc., to facilitate large-scale production , rich in resources and low cost of preparation

Active Publication Date: 2019-03-29
SCI GREEN SHANDONG ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the one hand, due to the CuV 2 o 6 Destroying the structure of it may lead to an irreversible phase transition; on the other hand, when matched with anode materials, a low-voltage platform is not conducive to improving the energy density of lithium-ion batteries

Method used

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  • Preparation method of copper vanadate, the copper vanadate prepared through the method, and application of the copper vanadate in lithium ion batteries
  • Preparation method of copper vanadate, the copper vanadate prepared through the method, and application of the copper vanadate in lithium ion batteries
  • Preparation method of copper vanadate, the copper vanadate prepared through the method, and application of the copper vanadate in lithium ion batteries

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preparation example Construction

[0033] The embodiment of the present invention relates to a preparation method of copper vanadate, the method comprising the following steps:

[0034] (1) ammonium metavanadate, CuCl 2 2H 2 After O is mixed with o-phenanthroline, it is hydrothermally reacted at 180-200° C. for 30-50 hours to obtain a vanadium-copper precursor.

[0035] In one embodiment of the present invention, ammonium metavanadate, CuCl 2 2H 2 The molar ratio of O to phenanthroline is (1.5-3):1:1. O-phenanthroline, also known as 1,10-phenanthroline, is mainly used as an organic ligand to participate in the preparation of vanadium-copper precursors.

[0036] Further, tetrabutylammonium hydroxide (TBAOH) is also added before the hydrothermal reaction, which is added in a small amount, tetrabutylammonium hydroxide and CuCl 2 2H 2 The molar ratio of O can be (1×10 -4 ~3×10 -4 ):1. TBAOH is mainly used as a template to participate in the preparation of vanadium-copper precursors.

[0037] (2) Calcining...

Embodiment 1

[0041] (1) ammonium metavanadate and copper chloride (CuCl) with a purity of more than 99.9% 2 2H 2 O), o-phenanthroline take by weighing 0.52mmol, 0.28mmol, 0.28mmol respectively.

[0042] (2) Put 0.28mmol of copper chloride in a beaker, add 12ml of deionized water and stir for 10 minutes to form a uniform solution. Then add 0.28mmol o-phenanthroline and 0.52mmol ammonium metavanadate to the solution, and stir for 30m / / .

[0043] (3) adding 0.2ml mass concentration to the solution obtained in step (2) is 10% tetrabutylammonium hydroxide aqueous solution (TBAOH is 7.7 × 10 -5 mmol), after stirring evenly, the homogeneous solution was transferred to a 15ml polytetrafluoroethylene hydrothermal reaction kettle, and reacted at 200°C for 48h. After natural cooling, the reaction solution is filtered, washed, dried, and collected to obtain a vanadium-copper precursor.

[0044] (4) Move the vanadium-copper precursor obtained in step (3) into a crucible, place it in a muffle furnac...

Embodiment 2

[0056] In the preparation process of copper vanadate, TBAOH was not added, and the remaining reagent consumption and operation steps were the same as in Example 1.

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Abstract

The invention provides a preparation method of copper vanadate. The method includes: 1) mixing ammonium metavanadate, CuCl2.2H2O and phenanthroline and performing hydrothermal reaction for 90-100 h at180-200 DEG C to make a vanadium-copper precursor; 2) calcining the vanadium-copper precursor at 500-600 DEG C for 2-3 h to obtain the copper vanadate. The invention also provides the copper vanadateprepared through the method, and an application of the copper vanadate as an anode material in lithium ion batteries so as to significantly increase capacity of the battery. When current density is 50 mA / g, the first discharge capacity of the battery reaches 1197 mAh / g, which is significantly higher than the theoretical capacity, 340 mAh / g, of commercial graphite.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a method for preparing copper vanadate, the copper vanadate prepared by the method, and the application of the copper vanadate in lithium ion batteries. Background technique [0002] The development of lithium-ion batteries is accompanied by the discovery and exploration of new electrode materials. For example, the successful application of lithium cobaltate and lithium iron phosphate as positive electrode materials, and lithium titanate as negative electrode materials have largely promoted the development of lithium-ion batteries. Remarkable progress has been made so far in lithium-ion batteries, while the search for new materials continues. [0003] Vanadium is a typical metal element with multiple valence states, and can form a series of metal vanadium oxides (M x V y o z , M=Fe, Cu, Z / , Ag, Co), which shows great potential for use in Li-ion batteries. Among the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G33/00H01M4/58H01M10/0525
CPCH01M4/5825H01M10/0525C01G33/00C01P2002/72C01P2004/03Y02E60/10
Inventor 韩吉姝王磊孙静刘艳茹赵瑞阳陈瑞欣
Owner SCI GREEN SHANDONG ENVIRONMENT TECH CO LTD
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