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Preparation method of high-performance zinc oxide/ferric oxide/zinc ferrite ternary composite negative electrode material used for lithium ion batteries

A ternary composite and negative electrode material technology, applied in battery electrodes, electrical components, secondary batteries, etc., can solve the problems of poor electrode performance, poor electrical contact, particle pulverization, etc., and achieve low cost and high yield , The effect of the simple preparation method

Active Publication Date: 2018-07-13
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ZnFe 2 o 4 As a lithium-ion battery negative electrode material, obvious volume changes will occur during the intercalation / delithiation process, resulting in particle powdering and shedding, making its electrical contact worse, resulting in poor electrode performance.

Method used

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  • Preparation method of high-performance zinc oxide/ferric oxide/zinc ferrite ternary composite negative electrode material used for lithium ion batteries
  • Preparation method of high-performance zinc oxide/ferric oxide/zinc ferrite ternary composite negative electrode material used for lithium ion batteries
  • Preparation method of high-performance zinc oxide/ferric oxide/zinc ferrite ternary composite negative electrode material used for lithium ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) 1.1g Zn(NO 3 ) 2 .6H 2 O and 2.0 g FeCl 3 .6H 2 O mix.

[0014] (2) Add 2.0g sucrose to the mixture of step (1), then add 0.0688g Zn(NO 3 ) 2 .6H 2 O(Zn(NO) added in step (2) 3 ) 2 .6H 2 O and the FeCl added in step (1) 3 .6H 2 The molar ratio of O was 1:32), and then 5 mL of deionized water was added to dissolve it completely.

[0015] (3) Place the mixed solution obtained in step (2) in a muffle furnace and heat it from room temperature to 600°C under an air atmosphere at a heating rate of 5°C / min, sintering at 600°C for 3 hours, and after cooling in the furnace Obtain ZnO / Fe with micro / nano hierarchical sheet structure 2 o 3 / ZnFe 2 o 4 Ternary composite anode material.

Embodiment 2

[0017] (1) 1.1g Zn(NO 3 ) 2 .6H 2 O and 2.0 g FeCl 3 .6H 2 O mix.

[0018] (2) Add 2.0g sucrose to the mixture of step (1), then add 0.275g Zn(NO 3 ) 2 .6H 2 O(Zn(NO) added in step (2) 3 ) 2 .6H 2 O and the FeCl added in step (1) 3 .6H 2 The molar ratio of O was 1:8), and then 5 mL of deionized water was added to dissolve it completely.

[0019] (3) Place the mixed solution obtained in step (2) in a muffle furnace and heat it from room temperature to 600°C under an air atmosphere at a heating rate of 5°C / min, sintering at 600°C for 3 hours, and after cooling in the furnace Obtain ZnO / Fe with micro / nano hierarchical sheet structure 2 o 3 / ZnFe 2 o 4 Ternary composite anode material.

Embodiment 3

[0021] (1) 1.1g Zn(NO 3 ) 2 .6H 2 O and 2.0 g FeCl 3 .6H 2 O mix.

[0022] (2) Add 2.0 g of sucrose to the mixture of step (1), and then add 1.1 g of Zn (NO 3 ) 2 .6H 2 O(Zn(NO) added in step (2) 3 ) 2 .6H 2 O and the FeCl added in step (1) 3 .6H 2 The molar ratio of O was 1:2), and then 5 mL of deionized water was added to dissolve it completely.

[0023] (3) Place the mixed solution obtained in step (2) in a muffle furnace and heat it from room temperature to 600°C under an air atmosphere at a heating rate of 5°C / min, sintering at 600°C for 3 hours, and after cooling in the furnace Obtain ZnO / Fe with micro / nano hierarchical sheet structure 2 o 3 / ZnFe 2 o 4 Ternary composite anode material.

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Abstract

The invention discloses a preparation method of a high-performance zinc oxide / ferric oxide / zinc ferrite ternary composite negative electrode material used for lithium ion batteries. The preparation method comprises the following steps: taking zinc nitrate hexahydrate and ferric chloride hexahydrate as a zinc source and an iron source, taking cane sugar as an auxiliary agent, and adopting a high-temperature sintering method to prepare the zinc oxide / ferric oxide / zinc ferrite (ZnO / Fe2O3 / ZnFe2O4) ternary composite material with a microscale / nanoscale sheet-like structure. The ZnO / Fe2O3 / ZnFe2O4 ternary composite material prepared by the method has relatively high lithium intercalation / removal performance as the negative material for lithium ion batteries, and the preparation method is extremely simple and convenient, low in cost, high in yield and easily-controlled in preparation conditions and is applicable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, and in particular relates to a high-performance zinc oxide / ferric oxide / zinc ferrite (ZnO / Fe 2 o 3 / ZnFe 2 o 4 ) A method for preparing a ternary composite negative electrode material. technical background [0002] Double-transition metal oxide anode materials utilize the compounding principle of two metals to take advantage of multi-components, and have better intercalation / delithiation performance compared with general transition metal oxides. Among them, the double transition metal oxide ZnFe 2 o 4 Due to its relatively high theoretical specific capacity (1072mAhg -1 ), good safety, wide source of raw materials, low cost, environmental friendliness and other advantages, it has been valued by more people. However, ZnFe 2 o 4 As a lithium-ion battery anode material, obvious volume changes will occur during the intercalation / delithiation process, resulting in particle pulv...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/52H01M4/62H01M10/0525
CPCH01M4/362H01M4/483H01M4/523H01M4/62H01M10/0525Y02E60/10
Inventor 李延伟姚金环郑远远严靖
Owner GUILIN UNIVERSITY OF TECHNOLOGY