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Lithium battery for inhibiting growth of lithium dendrites by utilizing liquid metal as well as preparation method and application thereof

A liquid metal and liquid battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of difficulty in large-scale production, complex methods, and high costs, and achieve scale production, simple coating, and easy The effect of film formation

Inactive Publication Date: 2020-02-04
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these research works are far from enough, and some methods are more complex, costly and difficult to achieve large-scale production

Method used

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  • Lithium battery for inhibiting growth of lithium dendrites by utilizing liquid metal as well as preparation method and application thereof
  • Lithium battery for inhibiting growth of lithium dendrites by utilizing liquid metal as well as preparation method and application thereof
  • Lithium battery for inhibiting growth of lithium dendrites by utilizing liquid metal as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of preparation of the lithium battery that utilizes liquid metal to suppress lithium dendrite growth, comprises the steps:

[0034] (1) Clean the surface of the copper foil (current collector) with absolute ethanol to remove impurities and oil.

[0035] (2) Use a small brush to coat a thin layer of gallium indium tin zinc liquid metal (melting point 3° C.) on the copper foil in step (1), and the loading capacity of the liquid metal is 0.5 mg / cm 2 ,Such as figure 1 shown.

[0036] (3) The obtained current collector is cut into a disc with a diameter of 1 cm, and then a lithium sheet with a diameter of 1 cm is used as a counter electrode, and an ether liquid electrolyte 1MLiTFSIDOL / DME (1:11% LiNO 3 ), assembled into a 2032-type button battery under an argon atmosphere, including a positive electrode case (stainless steel), a negative electrode case (stainless steel), a gasket (stainless steel), a current collector, a lithium sheet, an electrolyte, and a separato...

Embodiment 2

[0038] A kind of preparation of the lithium battery that utilizes liquid metal to suppress lithium dendrite growth, comprises the steps:

[0039] (1) Clean the surface of the copper foil (current collector) with absolute ethanol to remove impurities and oil.

[0040] (2) Use a small brush to coat a thin layer of gallium indium tin liquid metal (melting point 5° C.) on the copper foil in step (1), and the loading capacity of the liquid metal is 0.5 mg / cm 2 ,Such as figure 1 shown.

[0041] (3) The obtained current collector is cut into a disc with a diameter of 1 cm, and then a lithium sheet with a diameter of 1 cm is used as a counter electrode, and an ether liquid electrolyte 1MLiTFSIDOL / DME (1:11% LiNO 3 ), the current collector of this embodiment was assembled into the 2032-type button cell shown in Embodiment 1 under an argon atmosphere.

Embodiment 3

[0043] A kind of preparation of the lithium battery that utilizes liquid metal to suppress lithium dendrite growth, comprises the steps:

[0044] (1) Clean the surface of the copper foil (current collector) with absolute ethanol to remove impurities and oil.

[0045] (2) Use a small brush to coat a thin layer of gallium-zinc liquid metal (melting point 25° C.) on the copper foil in step (1), and the loading capacity of the liquid metal is 0.5 mg / cm 2 ,Such as figure 1 shown.

[0046] (3) The obtained current collector is cut into a disc with a diameter of 1 cm, and then a lithium sheet with a diameter of 1 cm is used as a counter electrode, and an ether liquid electrolyte 1MLiTFSIDOL / DME (1:11% LiNO 3 ), the current collector of this embodiment was assembled into the 2032-type button cell shown in Embodiment 1 under an argon atmosphere.

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Abstract

The invention relates to the technical field of lithium ion batteries, and particularly relates to a lithium battery for inhibiting growth of lithium dendrites by utilizing liquid metal as well as a preparation method and application thereof. The method comprises the steps of coating a gallium-based liquid metal layer on a current collector, taking the current collector as a positive electrode, and assembling the current collector and components required by the lithium battery into a liquid battery in an inert atmosphere so as to obtain the lithium battery. According to the invention, the lithium affinity of the current collector is improved by using the low-temperature gallium-based liquid metal coating, the initial nucleation potential barrier of lithium is reduced, the growth of lithiumdendrites is finally eliminated, uniform metal lithium deposition is realized, the coulombic efficiency of the battery is remarkably improved, the SEI film is stabilized, the cycle life of the battery is prolonged, and the occurrence of safety problems induced by the lithium dendrites are reduced. According to the method, the preparation of the current collector can be completed through the simple liquid metal coating, and the large-scale production is greatly facilitated.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium battery which uses liquid metal to suppress the growth of lithium dendrites, a preparation method and application thereof. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] With the rapid development of new energy industries such as electric vehicles, people's requirements for energy storage devices with high safety and high energy density are becoming more and more urgent. Lithium-ion batteries are currently the most rapidly developing new energy storage devices. However, the energy density of currently used lithium-ion batteries is genera...

Claims

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Application Information

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IPC IPC(8): H01M4/66H01M4/134H01M10/0525
CPCH01M4/134H01M4/661H01M4/667H01M10/0525H01M2004/028Y02E60/10
Inventor 冯金奎魏传亮
Owner SHANDONG UNIV
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