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Three-dimensional lithium battery current collector, preparation method and application thereof

A technology for current collectors and lithium metal batteries, applied in lithium batteries, battery electrodes, electrode carriers/current collectors, etc., can solve the problems of high reactivity, reduced coulombic efficiency and cycle life of lithium metal batteries, unstable SEI films, etc. To achieve the effect of simple operation, alleviating battery safety problems, and improving transmission rate

Pending Publication Date: 2021-06-08
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the uncontrollable growth of Li dendrites, infinite volume expansion, high reactivity, and the formation of unstable SEI films reduce the Coulombic efficiency and cycle life of Li metal batteries.

Method used

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  • Three-dimensional lithium battery current collector, preparation method and application thereof
  • Three-dimensional lithium battery current collector, preparation method and application thereof
  • Three-dimensional lithium battery current collector, preparation method and application thereof

Examples

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preparation example Construction

[0025] In a second aspect, the present invention provides a method for preparing the above-mentioned three-dimensional layered MXene@Au composite film, including the steps of preparing a three-dimensional layered MXene film and then sputtering gold nanoparticles on the three-dimensional layered MXene film.

[0026] In some embodiments, the preparation method of three-dimensional layered MXene film comprises the steps of: preparing MXene colloidal solution, by suction filtering and drying the MXene colloidal solution to prepare three-dimensional layered Mxene film; Sputter the gold nanoparticle layer.

[0027] Further, the preparation method of the MXene colloidal solution is: mixing and stirring the powder of the MAX phase with acid and fluoride, adding water, and centrifuging to form an exfoliated few-layer or single-layer MXene colloidal solution.

[0028] Still further, the powder of the MAX phase is selected from Ti 3 AlC 2 , Nb 4 AlC 3 、Ti 3 SiC 2 、 Ta 4 SiC 3 , N...

Embodiment 1

[0042] Take 0.5gTi 3 AlC 2Powder, stirred in a mixed solution of 10ml of 6M hydrochloric acid and 0.5g of lithium fluoride, then added water, centrifuged (3500r / min) to wash to remove excess acid and fluoride, then ultrasonically stripped, separated to obtain a few-layer MXene colloidal solution, and suction filtered Afterwards, a flexible and self-supporting three-dimensional layered MXene film was obtained by drying in a vacuum oven overnight at 60 °C.

[0043] Gold nanoparticles were deposited on the three-dimensional layered MXene film by vapor deposition at a current of 2 mA for 3 min in an ion sputtering apparatus to obtain a flexible and self-supporting three-dimensional layered MXene@Au composite film.

[0044] Finally, the battery was assembled in the glove box, the flexible self-supporting three-dimensional layered MXene@Au film current collector was cut into a disc with a diameter of 1 cm, and metal lithium was pre-deposited on the composite film to obtain an alter...

Embodiment 2

[0046] Take 0.5gV 2 AlC powder, stirred in a mixed solution of 6M hydrochloric acid 10ml and 0.5g lithium fluoride, then added water, centrifuged and washed to remove excess acid and fluoride, and then ultrasonic stripped to separate the obtained few-layer MXene colloidal solution, after suction filtration, in The flexible and self-supporting three-dimensional layered MXene film was obtained by drying in a vacuum oven at 60 °C overnight.

[0047] Gold nanoparticles were deposited on the three-dimensional layered MXene film by vapor deposition at a current of 5 mA for 4 min in an ion sputtering apparatus to obtain a flexible and self-supporting three-dimensional layered MXene@Au composite film.

[0048] Finally, the battery was assembled in the glove box, the flexible self-supporting three-dimensional layered MXene@Au film current collector was cut into a disc with a diameter of 1 cm, and metal lithium was pre-deposited on the composite film to obtain an alternative lithium met...

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Abstract

The invention discloses a three-dimensional lithium battery current collector, a preparation method and application thereof. The three-dimensional lithium battery current collector comprises a flexible self-supporting three-dimensional layered MXene film and a gold nanoparticle layer loaded on the flexible self-supporting three-dimensional layered MXene film. According to the flexible self-supporting three-dimensional layered Mxene film, the three-dimensional layered structure can provide more nucleation sites, an effective and good buffer layer is provided, and the substance has high conductivity, good hydrophilicity and good mechanical flexibility. Besides, the preparation of the MXene film does not need any conductive agent or additive, a self-supporting, hydrophilic, flexible and conductive film is assembled through simple suction filtration, an integrated three-dimensional flexible electrode is formed, and the preparation cost of the electrode is greatly saved.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic composite materials and lithium metal batteries, and relates to a three-dimensional lithium battery current collector and its preparation method and application, in particular to a MXene / gold that can be used in a high-safety dendrite-free lithium metal battery system Preparation method and application of composite current collector. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the increasing demand for electric vehicles, large-scale energy storage, and light electric vehicles, the global non-renewable resources are decreasing. Based on the current urgent d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/134H01M10/052
CPCH01M4/667H01M4/663H01M4/661H01M4/134H01M10/052Y02E60/10
Inventor 冯金奎钱壹
Owner SHANDONG UNIV
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