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Preparation method of carbon cloth based cathode iron oxide of lithium ion battery

A lithium-ion battery and carbon cloth-based technology, which is applied in the field of preparation of lithium-ion battery carbon cloth-based negative electrode iron oxide, can solve the problems of strong toxicity and sensitization, difficult waste liquid treatment, and high recycling costs, and achieve high Charge-discharge specific capacity, improve electrochemical activity and rate performance, and improve conductivity

Inactive Publication Date: 2018-05-25
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although iron oxide has many excellent properties as an anode material for lithium-ion batteries, its poor cycle performance due to its severe volume expansion during lithium intercalation hinders its popularization and application.
[0005] In order to solve the above problems, Chinese patent document CN 106229153A discloses a method for preparing a carbon cloth-supported nickel oxide-coated iron oxide nanorod composite material, which uses a hydrothermal method to grow iron oxide nanorods on carbon cloth, but the hydrothermal method Reaction in a closed environment with a certain pressure is required, the preparation process is complicated, energy consumption is serious, and the cost is high; in order to improve the performance of the negative electrode material, it is necessary to coat nickel oxide on the surface of iron oxide, so nickel nitrate needs to be used at the same time in this preparation method , while the price of nickel is relatively high and nickel compounds are highly toxic and sensitizing, which is not conducive to environmental protection; finally, due to the variety of solutes used in the hydrothermal reaction, four solutes are shared, and the waste liquid after the reaction is treated Difficult and expensive to recycle

Method used

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  • Preparation method of carbon cloth based cathode iron oxide of lithium ion battery
  • Preparation method of carbon cloth based cathode iron oxide of lithium ion battery
  • Preparation method of carbon cloth based cathode iron oxide of lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0047] (1) Set the surface area to 30cm 2 The carbon cloth was ultrasonically cleaned in acetone, ethanol and ultrapure water for 40 minutes respectively, and after drying, it was immersed in 67% concentrated nitric acid and heated and stirred in a water bath at 60 ° C for 8 hours, cleaned with ultrapure water and dried .

[0048] (2) 1.3515 g of ferric chloride hexahydrate was dissolved in 49 milliliters of deionized water to prepare a ferric chloride solution with a concentration of 0.1 mol / L. The pretreated carbon cloth in step (1) was completely immersed in the above-mentioned ferric chloride solution, and heated in a water bath at 60° C. for 5 hours after ultrasonication for 15 minutes. The ultrasonic conditions are 40KHz, 20°C.

[0049] (3) The carbon cloth was taken out from the solution, rinsed with deionized water and dried at 80°C.

[0050] (4) Calcining the above-mentioned carbon cloth at 450° C. for 8 hours in air to obtain a carbon cloth-based negative electrod...

Embodiment 2

[0052] (1) Set the surface area to 100cm 2 The carbon cloth was ultrasonically cleaned in acetone, ethanol and ultrapure water for 40 minutes respectively, and after drying, it was immersed in 67% concentrated nitric acid and heated and stirred in a water bath at 120 ° C for 6 hours, cleaned with ultrapure water and dried .

[0053] (2) 1.3515 g of ferric chloride hexahydrate was dissolved in 49 milliliters of deionized water to prepare a ferric chloride solution with a concentration of 0.1 mol / L. The carbon cloth after the pretreatment in the step (1) is taken 90cm 2 Completely immerse in the above-mentioned ferric chloride solution, conduct ultrasonic heating reaction at 70° C. for 3 hours after ultrasonication for 15 minutes. The ultrasonic conditions are 40KHz, 25°C.

[0054] (3) The carbon cloth was taken out from the solution, rinsed with deionized water and dried at 80°C.

[0055] (4) Calcining the above-mentioned carbon cloth at 450° C. for 8 hours in the air to ob...

Embodiment 3

[0057] (1) Set the surface area to 300cm 2 The carbon cloth was ultrasonically cleaned in acetone, ethanol and ultrapure water for 40 minutes respectively, and after drying, it was immersed in 67% concentrated nitric acid and heated and stirred in a water bath at 120 ° C for 8 hours, cleaned with ultrapure water and dried .

[0058] (2) 1.3515 g of ferric chloride hexahydrate was dissolved in 49 milliliters of deionized water to prepare a ferric chloride solution with a concentration of 0.1 mol / L. The carbon cloth after the pretreatment in step (1) is taken 60cm 2 Completely immersed in the above-mentioned ferric chloride solution, ultrasonicated for 15 minutes, then heated in a water bath at 80°C for 4 hours. The ultrasonic conditions are 40KHz, 30°C.

[0059] (3) The carbon cloth was taken out from the solution, rinsed with deionized water and dried at 80°C.

[0060] (4) Calcining the above-mentioned carbon cloth at 450° C. for 8 hours in the air to obtain the carbon clo...

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Abstract

The invention discloses a preparation method of carbon cloth based cathode iron oxide of a lithium ion battery and carbon cloth based cathode iron oxide of the lithium ion battery prepared by the method. The preparation method comprises the steps of: performing hydroxylation pretreatment on carbon cloth, washing and drying the carbon cloth, soaking the carbon cloth in an aqueous solution of ferrictrichloride for an ultrasound reaction, heating for reaction for 3-5h at 60-100 DEG C, culturing a crystal on the surface of the carbon cloth, taking out, cleaning and drying the obtained carbon cloth, calcining and cooling the cleaned carbon cloth, and obtaining carbon cloth based cathode iron oxide of the lithium ion battery. A suspension after a heating reaction can be used for preparing carbon cloth based cathode iron oxide of the lithium ion battery again after a simple recovery reaction.

Description

technical field [0001] The invention relates to the field of electrode materials, in particular to a preparation method of carbon cloth-based negative electrode iron oxide for lithium ion batteries. Background technique [0002] Lithium-ion batteries have many advantages such as high energy density, high specific power, and long cycle life, and are considered to be the most ideal energy supply devices for next-generation hybrid vehicles and electric vehicles. At the same time, with the widespread application of portable electronic products, lithium-ion batteries have become the most commercially successful energy device. In order to meet the challenges of future demand for energy storage devices, it is very important to design and prepare new electrode materials. [0003] At present, commercial lithium-ion batteries mainly use graphite as the negative electrode material. However, the electrode potential of carbon-based materials is similar to that of metal lithium. When th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52H01M4/62B82Y30/00H01M10/0525
CPCB82Y30/00H01M4/52H01M4/625H01M10/0525Y02E60/10
Inventor 刘钰旻熊万晟夏宇江云
Owner JIANGHAN UNIVERSITY