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Wire structure carbon fiber / MoS2 / MoO2 flexible electrode material and preparation method thereof

A flexible electrode and carbon fiber technology, used in microfiber electrodes, electrode manufacturing, battery electrodes, etc., can solve the problems of poor stability of molybdenum sulfide, fast energy decay, etc., to improve energy density and power density, improve stability and conductivity. properties, improved electrical conductivity and cycle stability

Active Publication Date: 2017-09-29
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, molybdenum sulfide exhibits poor stability and rapid energy decay due to the reaction mechanism of lithium intercalation / delithiation during charge and discharge.

Method used

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  • Wire structure carbon fiber / MoS2 / MoO2 flexible electrode material and preparation method thereof
  • Wire structure carbon fiber / MoS2 / MoO2 flexible electrode material and preparation method thereof
  • Wire structure carbon fiber / MoS2 / MoO2 flexible electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1: Wire Structure Carbon Fiber / MoS 2 / MoO 2 Flexible electrode material Ⅰ

[0023] Wet paper towel in 1 mol L -1 Soak in dilute hydrochloric acid for 12 hours, then transfer the wet paper towel to a mixed solution of absolute ethanol / acetone with a volume ratio of 1:1 and soak for 6 hours, then wash the obtained wet paper towel with absolute ethanol and deionized water for 3-5 times , and then put it in a drying oven at 60°C for 12h to get the treated wet tissue and then calcined it in a tube furnace at 800°C for 4h, then put it in a hydrothermal kettle with 0.24g sodium molybdate and 0.76g thiourea 200 ℃ water heating for 24h. Formation of MoS from sodium molybdate and thiourea during hydrothermal process 2 Coated on the surface of carbon fiber to obtain flexible carbon fiber / MoS 2 flexible material. Finally, the material was calcined in oxygen at 500°C for 1 h at a low temperature to form a wire-structured carbon fiber / MoS 2 / MoO 2 Flexible electrode m...

Embodiment 2

[0024] Example 2 Wire Structure Carbon Fiber / MoS 2 / MoO 2 Flexible electrode material Ⅱ

[0025] Wet paper towel in 1 mol L -1 Soak in dilute hydrochloric acid for 12 hours, then transfer the wet paper towel to a mixed solution of absolute ethanol / acetone with a volume ratio of 1:1 and soak for 6 hours, then wash the obtained wet paper towel with absolute ethanol and deionized water for 3-5 times , and then dried in a 60°C drying oven for 12h. The treated wet tissue was calcined in a tube furnace at 800°C for 4h, and then placed in a hydrothermal kettle with 0.24g sodium molybdate and 0.76g thiourea in 200°C water Heat for 24 hours. Formation of MoS from sodium molybdate and thiourea during hydrothermal process 2 Coated on the surface of carbon fiber to obtain flexible carbon fiber / MoS 2 flexible material. The material was then calcined at 600 °C for 1 h in oxygen to form a wire-structured carbon fiber / MoS 2 / MoO 2 Flexible electrode material. The electrode material t...

Embodiment 3

[0026] Example 3 Wire Structure Carbon Fiber / MoS 2 / MoO 2 Flexible Electrode MaterialsⅢ

[0027] Put wet paper towel in 1mol L -1 Soak in dilute hydrochloric acid for 12 hours, then transfer the wet paper towel to a mixed solution of absolute ethanol / acetone with a volume ratio of 1:1 and soak for 6 hours, then wash the obtained wet paper towel with absolute ethanol and deionized water for 3-5 times , and then put it in a drying oven at 60°C for 12h to get the treated wet tissue and then calcined it in a tube furnace at 800°C for 4h, then put it in a hydrothermal kettle with 0.24g sodium molybdate and 0.76g thiourea 200 ℃ water heating for 24h. Formation of MoS from sodium molybdate and thiourea during hydrothermal process 2 Coated on the surface of carbon fiber to obtain flexible carbon fiber / MoS 2 flexible material. The material was then calcined at 400 °C in oxygen for 1 h to form a wire-structured carbon fiber / MoS 2 / MoO 2 Flexible electrode material. The electrod...

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Abstract

The present invention discloses a wire structure carbon fiber / MoS2 / MoO2 flexible electrode material and a preparation method thereof, and belongs to the field of electrochemistry and new energy materials. The inner layer of the electrode material is carbon fiber, the intermediate layer is MoS2, the outermost layer is MoO2, and the electrode material is a three-layer-covered wire structure. The inner layer carbon fiber is used as an electron and ion transmission path, and the intermediate layer MoS2 provides high capacity, and the outer layer MoO2 coating can not only improve the capacity of the material, but also improves the conductivity of the material. The wire structure material is used as a negative electrode material of a lithium ion battery. Wet paper towel is treated by removing impurity, and calcined at high temperature, and the wet paper towel is carbonized at high temperature to form the flexible carbon fiber, and then the carbon fiber / MoS2 composite is formed by hydrothermal reaction with sodium molybdate and thiourea. The composite material is further calcined in oxygen at low temperature in oxygen to form the wire structure carbon fiber / MoS2 / MoO2 flexible electrode material. The three-layer-covered wire structure significantly improves the specific capacity and cycle stability of the material.

Description

technical field [0001] The invention discloses a wire structure carbon fiber / MoS 2 / MoO 2 A flexible electrode material and a preparation method thereof belong to the fields of electrochemistry and new energy materials. Background technique [0002] Bending and folding flexible electronic devices have been widely loved by people in recent years, and flexible lithium-ion batteries are the core components of flexible electronic devices. Traditional lithium-ion battery anode materials use copper foil as a current collector, which reduces the energy density of the battery. In the case of large bending deformation, the active material and the current collector are prone to detachment, which further affects the electrochemical performance of the material. Therefore, self-supporting flexible electrode materials without binders, conductive agents, and current collectors can significantly improve the energy density and electrochemical performance of materials under bending conditi...

Claims

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Application Information

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IPC IPC(8): H01M4/02H01M4/04H01M4/36H01M4/48H01M4/58
CPCH01M4/02H01M4/0471H01M4/362H01M4/48H01M4/5815H01M2004/022Y02E60/10
Inventor 陶华超张亚琼杜少林杨学林
Owner CHINA THREE GORGES UNIV
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