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A method for preparing a porous sponge-like carbon-based nano-electrode material

A porous sponge and nano-electrode technology, applied in battery electrodes, nanotechnology, nanotechnology, etc., can solve the problems of low electronic conductivity, lithium ion diffusion rate, lithium battery promotion and application limitations, etc., to achieve easy industrial scale production, Good cycle performance and rate performance, high specific capacity effect

Inactive Publication Date: 2019-01-18
DALIAN JIAOTONG UNIVERSITY
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Problems solved by technology

[0004] The electronic conductivity and lithium ion diffusion rate of traditional lithium-ion battery electrode materials are relatively low, which limits the promotion and application of lithium batteries.

Method used

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  • A method for preparing a porous sponge-like carbon-based nano-electrode material

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Embodiment 1

[0019] Dissolve 4g of lithium acetate, 3g of ammonium vanadate and 2g of citric acid in 15ml of deionized water, then add 10g of PVP (Mw=130,0000) and a mixed solution of 50ml of acetic acid and 45ml of ethanol, stir until uniform and transparent; then add 0.3g -C 3 N 4 Powder, stir vigorously until uniformly dispersed, and concentrate until the viscosity reaches 2.0Pa·s ‐1 , to obtain a spinning solution. The spinning stock solution is injected into the spinneret, the spinning voltage is set to 15kV, the collection distance is adjusted to 15cm, and the solution flow rate is controlled to 1.0mL h by a medical syringe pump ‐1 , the precursor fibers were collected in 5 × 5 cm 2 carbon paper, and after vacuum drying at room temperature, the resulting product was calcined at 500°C for 5 hours, then taken out, immersed in 200ml phosphomolybdic acid solution of 0.3mol / L for 8h, and then put into a tube furnace protected by nitrogen , heated at 800°C for 6 hours to obtain the fin...

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Abstract

The invention discloses a preparation method of a porous sponge-like carbon-based Li3VO4 / g-C3N4 / MoXC nanoelectrode material. The method comprises dissolving lithium acetate, ammonium vanadate and citric acid in deionized water, and perforing stirring and clarification in a 40- 55 DEG C water bath condition, then adding that mixed solution of acetic acid containing PVP and ethanol, stirring to homogeneity and transparency; Then adding a small amount of g-C3N4 power, strongly stirring until uniformly disper to obtain a spinning solution; Electrospinning was carried out, precursor fibers were collected, and the resulting product was calcinated at 400-500 DEG C, puting the product into phosphomolybdic acid solution for impregnation, and then put the product into tubular furnace to be heated at700-1000 DEG C for 4-6 hours. The electrode is porous, and the active specific surface area of the electrode for electrochemical reaction is greatly increased, so that the real current density of theelectrode is greatly reduced, so that the energy loss of the battery is greatly reduced, and the performance of the battery is significantly improved.

Description

technical field [0001] The present invention relates to a kind of porous spongy carbon-based Li 3 VO 4 / g‐C 3 N 4 / Mo X Preparation method of C nanometer electrode material. Background technique [0002] With the process of economic globalization and the extensive use of fossil fuels, the problems of environmental pollution and energy shortage have become increasingly prominent. In order to reduce pollution during the use of fossil fuels, develop wind, light, electricity sustainable renewable energy and new power batteries and high-efficiency energy storage systems, to achieve a reasonable allocation of renewable energy and power regulation, to improve resource utilization and solve the energy crisis and environmental protection are of great strategic importance. [0003] Lithium-ion battery is currently the battery system with the best comprehensive performance. It has the characteristics of high specific energy, high cycle life, small size, light weight, no memory ef...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/583H01M10/0525B82Y30/00H01M4/02
CPCB82Y30/00H01M4/362H01M4/485H01M4/583H01M10/0525H01M2004/021Y02E60/10
Inventor 刘顺于洪全兰喜杰
Owner DALIAN JIAOTONG UNIVERSITY
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