Preparation method of PEDOT@beta-FeOOH/rGO array type lithium ion battery negative electrode material

A technology for lithium ion batteries and negative electrode materials, applied in the field of electrochemistry, can solve the problems of poor conductivity and large volume expansion, and achieve the effects of low cost, easy implementation and simple experimental method.

Active Publication Date: 2018-07-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

β--FeOOH is an important component of iron oxides and is also considered as a promising candidate for a new generation of anode materials due to its high capacity (>1200mAh / g), abundant natural resources, non-toxicity, and low cost. , but it also has the same disadvantages as other transition metal oxides, such as poor conductivity and large volume expansion.

Method used

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  • Preparation method of PEDOT@beta-FeOOH/rGO array type lithium ion battery negative electrode material
  • Preparation method of PEDOT@beta-FeOOH/rGO array type lithium ion battery negative electrode material
  • Preparation method of PEDOT@beta-FeOOH/rGO array type lithium ion battery negative electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 1) Disperse commercially available graphene oxide in 25mL deionized water to form a 1mg / mL solution, and then disperse it with a 300W ultrasonic generator for 1h to form a uniformly dispersed graphene oxide suspension A;

[0028] 2) Add the analytically pure soluble ferric salt hexahydrate ferric chloride to the above suspension A, add 0.01mLEDOT dropwise under stirring condition, and then fully stir to dissolve the ferric salt and disperse the EDOT evenly, and prepare ferric salt and A mixed solution of graphene oxide and EDOT, wherein the concentration of iron salt is 0.05mol / L, and then the mixed solution is dispersed by a 300W ultrasonic generator for 2h to obtain a suspension B;

[0029] 3) Pour the suspension B prepared above into the polytetrafluoroethylene lining of the homogeneous hydrothermal reactor, the filling degree is 30%, then seal the reactor, and put it into the homogeneous hydrothermal reactor Carry out hydrothermal reaction at 50°C for 5 hours, and n...

Embodiment 2

[0035] 1) Disperse commercially available graphene oxide in 30mL deionized water to form a 2mg / mL solution, and then disperse it with a 300W ultrasonic generator for 3h to form a uniformly dispersed graphene oxide suspension A;

[0036] 2) Add the analytically pure soluble ferric salt hexahydrate ferric chloride to the above suspension A, add 0.02mLEDOT dropwise under stirring condition, and then fully stir to dissolve the ferric salt and disperse the EDOT evenly, and configure the ferric salt and A mixed solution of graphene oxide and EDOT, wherein the concentration of iron salt is 0.3mol / L, and then the mixed solution is dispersed for 3 hours by a 300W ultrasonic generator to obtain a suspension B;

[0037] 3) Pour the suspension B prepared above into the polytetrafluoroethylene lining of the homogeneous hydrothermal reactor, the filling degree is 80%, then seal the reactor, and then put it into the homogeneous hydrothermal reactor Carry out hydrothermal reaction at 70°C for...

Embodiment 3

[0041] 1) Disperse commercially available graphene oxide in 35 mL deionized water to form a 5 mg / mL solution, and then disperse it with an ultrasonic generator for 2 hours to form a uniformly dispersed graphene oxide suspension A;

[0042] 2) Add the analytically pure soluble iron salt heptahydrate ferrous sulfate to the above suspension A, add 0.025mLEDOT dropwise under stirring condition, and then fully stir to dissolve the iron salt and evenly disperse the EDOT, and configure it into iron salt and oxidation A mixed solution of graphene and EDOT, wherein the concentration of the iron salt is 0.5mol / L, and then the mixed solution is dispersed for 4 hours by a 300W ultrasonic generator to obtain a suspension B;

[0043] 3) Pour the suspension B prepared above into the polytetrafluoroethylene lining of the homogeneous hydrothermal reactor, the filling degree is 60%, then seal the reactor, and then put it into the homogeneous hydrothermal reactor Carry out hydrothermal reaction at...

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Abstract

Provided is a preparation method of a PEDOT@beta-FeOOH / rGO array type lithium ion battery anode material. The method comprises the steps that graphene oxide is dispersed in deionized water to obtain suspension A; soluble ferric salt and 3, 4-ethylenedioxythiophene (EDOT) are added into the suspension for intensive mixing to obtain suspension B; the suspension B is poured into a homogeneous phase hydrothermal reactor, then the reactor is sealed and put into a homogeneous phase hydrothermal reaction apparatus for a hydrothermal reaction, and then is naturally cooled to room temperature to obtaina product C; the product C is respectively washed with water and alcohol, and the washed product is dispersed in water to obtain a product D; and the product D is freeze-dried to obtain the PEDOT@beta-FeOOH / rGO self-assembled louver array type lithium ion battery negative electrode material. The preparation method of the PEDOT@beta-FeOOH / rGO array type lithium ion battery anode material has the advantages that the conductivity of reduced graphene oxide is good, the specific surface area is larger, the surface functional groups are more, the composition of ferric oxide and graphene significantly improves the dispersion of ferric oxide and avoids agglomeration, the conductive polymer PEDOT is used to coat the reduced graphene oxide, and the shape is conducted with self-assembled adjustmentand control to further improve the electrochemical performance of the product.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a preparation method of a negative electrode material of a PEDOT-coated β-FeOOH / rGO array type lithium ion battery. Background technique [0002] Lithium-ion battery anode materials are an important part of lithium-ion batteries, and the composition and structure of anode materials have a decisive impact on the electrochemical performance of lithium-ion batteries. Most transition metal complexes have high theoretical specific capacity, and the discharge potential platform is between 1.0 and 2.0V; as lithium-ion battery anode materials, the reaction mechanism of transition metal complexes is different from that of graphite materials. The alloying reaction of Sn and Si materials is a reversible redox reaction. [0003] Due to the natural abundance and non-toxicity of iron, iron-based transition metal oxide materials have been promising anode materials for lith...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M10/0525
CPCH01M4/366H01M4/52H01M4/624H01M4/625H01M4/628H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 曹丽云马萌齐慧李嘉胤黄剑锋姚恺陈文卓吴桂娟
Owner SHAANXI UNIV OF SCI & TECH
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