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Preparation method of positive pole material Na1.1V3O7.9 of lithium ion battery

A certain amount and molecular weight technology, applied in the direction of battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problems of poor cycle stability of vanadium-based positive electrode materials, and achieve simple and easy-to-operate production processes and processes, and cheap and easy-to-use materials The effect of obtaining and reducing production costs

Inactive Publication Date: 2018-07-10
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of poor cycle stability of vanadium-based positive electrode materials, the present invention provides a lithium-ion battery positive electrode material Na 1.1 V 3 o 7.9 method, the specific experimental scheme is:

Method used

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  • Preparation method of positive pole material Na1.1V3O7.9 of lithium ion battery
  • Preparation method of positive pole material Na1.1V3O7.9 of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Weigh a certain amount of V 2 o 5 (molecular weight 181.88, analytically pure) put into distilled water and stir and heat to 80°C to prepare solution A, V 2 o 5 The mass ratio of oxalic acid to distilled water is 3:100; weigh a certain amount of oxalic acid and dissolve it in distilled water to make solution B, the mass ratio of oxalic acid to distilled water is 6:100, oxalic acid and V 2 o 5 The molar ratio is 3:1;

[0021] (2) Slowly add the above-mentioned solution B to the solution A, heat and stir the solution to 100°C, the solution turns blue and transparent, then continue to stir and keep warm for 1 hour to obtain the solution C;

[0022] (3) Weigh a certain amount of NaNO according to the V:Na molar ratio of 3:1.1 3 (Molecular weight 84.99, analytically pure) soluble in distilled water, NaNO 3 The mass ratio to distilled water is 1:50. After stirring for 10 minutes, the solution D is obtained, and the solution D is slowly added dropwise to the solution...

Embodiment 2

[0025] (1) Weigh a certain amount of V 2 o 5 (molecular weight 181.88, analytically pure) put into distilled water and stir and heat to 80°C to prepare solution A, V 2 o 5The mass ratio of oxalic acid to distilled water is 3:100; weigh a certain amount of oxalic acid and dissolve it in distilled water to make solution B, the mass ratio of oxalic acid to distilled water is 6:100, oxalic acid and V 2 o 5 The molar ratio is 3:1;

[0026] (2) Slowly add the above-mentioned solution B to the solution A, heat and stir the solution to 100°C, the solution turns blue and transparent, then continue to stir and keep warm for 1 hour to obtain the solution C;

[0027] (3) Weigh a certain amount of NaNO according to the V:Na molar ratio of 3:1.1 3 (Molecular weight 84.99, analytically pure) soluble in distilled water, NaNO 3 The mass ratio to distilled water is 1:50. After stirring for 10 minutes, the solution D is obtained, and the solution D is slowly added dropwise to the solution ...

Embodiment 3

[0030] (1) Weigh a certain amount of V 2 o 5 (molecular weight 181.88, analytically pure) put into distilled water and stir and heat to 80°C to prepare solution A, V 2 o 5 The mass ratio of oxalic acid to distilled water is 3:100; weigh a certain amount of oxalic acid and dissolve it in distilled water to make solution B, the mass ratio of oxalic acid to distilled water is 6:100, oxalic acid and V 2 o 5 The molar ratio is 3:1;

[0031] (2) Slowly add the above-mentioned solution B to the solution A, heat and stir the solution to 100°C, the solution turns blue and transparent, then continue to stir and keep warm for 1 hour to obtain the solution C;

[0032] (3) Weigh a certain amount of NaNO according to the V:Na molar ratio of 3:1.1 3 (Molecular weight 84.99, analytically pure) soluble in distilled water, NaNO 3 The mass ratio to distilled water is 1:50. After stirring for 10 minutes, the solution D is obtained, and the solution D is slowly added dropwise to the solution...

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Abstract

The invention relates to a preparation method of a positive pole material Na1.1V3O7.9 of a lithium ion battery. The preparation method can prepare the positive electrode material Na1.1V3O7.9 with goodelectrochemical performances through a sol-gel method through heat treatment at different temperatures.

Description

technical field [0001] The invention relates to a lithium ion battery cathode material Na 1.1 V 3 o 7.9 A preparation method, the method uses a sol-gel method to prepare positive electrode materials with good electrochemical properties through heat treatment at different temperatures, and belongs to the technical field of lithium ion battery positive electrode materials. Background technique [0002] In recent years, lithium-ion batteries have developed rapidly. Cathode materials are an important part of lithium-ion batteries, and their technical indicators greatly affect the performance of batteries and directly determine the cost of batteries. Therefore, the development of cost-effective cathode materials has become the key to the development of lithium-ion batteries. Due to the advantages of easy preparation, high capacity, and good cycle performance, vanadyl oxides and their related vanadates have attracted more and more attention as cathode materials for lithium-ion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00H01M4/485H01M10/054
CPCC01G31/00C01P2002/72H01M4/485H01M10/054Y02E60/10
Inventor 赵萍庄会峰李卓辉刘继发高敏
Owner QILU UNIV OF TECH
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