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Multilayer lithium metal battery negative electrode and preparation method and preparation equipment thereof

A lithium metal battery and lithium metal technology, applied in the direction of electrode manufacturing, battery electrodes, non-aqueous electrolyte battery electrodes, etc., can solve the problems of difficult to achieve large-scale industrial mass production, complex artificial interface process, high raw material cost, etc., to achieve favorable Large-scale industrialized mass production, easy control of the preparation process, and simple preparation process

Pending Publication Date: 2022-06-03
SHENZHEN YANYI NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has some insurmountable problems, such as the high cost of the raw materials involved, the complexity of the artificial interface process, low production efficiency, and the difficulty in achieving large-scale industrial mass production at present.
[0008] Therefore, in view of the poor cycle stability, short service life and poor safety of lithium metal batteries in the prior art, it is urgent to develop a new lithium metal battery anode, which can effectively avoid the growth of internal lithium dendrites, The preparation process is easy to control, the production cost is low, and large-scale industrial production is possible

Method used

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  • Multilayer lithium metal battery negative electrode and preparation method and preparation equipment thereof
  • Multilayer lithium metal battery negative electrode and preparation method and preparation equipment thereof
  • Multilayer lithium metal battery negative electrode and preparation method and preparation equipment thereof

Examples

Experimental program
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preparation example Construction

[0063] The present invention also provides a method for preparing the negative electrode of the above-mentioned multilayer lithium metal battery, which comprises the following steps:

[0064] (1) lithium metal evaporation step;

[0065] (2) a fast ion conductor evaporation step; and

[0066] (3) The protective substance and the polymer solid electrolyte coating step.

[0067] In a preferred embodiment of the present invention, the steps (1) and (2) are continuously integrated.

[0068] In a preferred embodiment of the present invention, step (1) comprises: heating the lithium source under vacuum in an inert atmosphere to deposit lithium metal vapor onto the current collector, thereby forming a lithium metal layer-containing current collector.

[0069] In a preferred embodiment of the present invention, step (2) comprises: heating the fast ion conductor under vacuum in an inert atmosphere to vapor-deposit the fast ion conductor on the current collector of the lithium-containi...

Embodiment 1

[0138] (0) Feeding and vacuuming

[0139] The vacuum chamber (including the first vacuum evaporation device and the second vacuum evaporation device) was set to an argon atmosphere, and a lithium metal ingot with a mass of 300 g (the purity of the metal lithium ingot) was added to the crucible in the first vacuum evaporation device. 99.0%), lithium chloride with a mass of 100 g was added to the crucible in the second vacuum evaporation device. Then set the vacuum degree of the vacuum chamber to 1×10 -3 Pa, the water oxygen value remains less than 0.1ppm.

[0140] (1) Lithium metal vapor deposition

[0141] The crucible containing 300g of lithium metal ingots in the first vacuum evaporation device is heated, and the temperature rise rate is 5 °C / min, the crucible is heated to 650 °C at a constant speed, and the temperature is maintained, the lithium metal ingot is changed from solid state to liquid state, and finally into lithium vapor. The temperature of the temperature co...

Embodiment 2～6

[0151] The steps and contents of the preparation methods of Examples 2 to 6 are basically the same as those of Example 1, and the difference lies in the relevant components and process parameters, which are specifically shown in Tables 1 to 3.

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Abstract

The invention relates to a multi-layer lithium metal battery negative electrode and a preparation method and preparation equipment thereof. The multi-layer lithium metal battery negative electrode comprises a current collector, a lithium metal layer, a fast ion conductor layer and a functional protection layer. The invention also relates to a preparation method of the multilayer lithium metal battery negative electrode, which is characterized by comprising the following steps: (1) lithium metal evaporation; (2) fast ion conductor evaporation; and (3) a protective substance and polymer solid electrolyte coating step. In addition, the invention relates to equipment for preparing the multilayer lithium metal battery negative electrode. According to the multi-layer lithium metal battery negative electrode disclosed by the invention, the composite synergistic effect of the lithium metal layer, the fast ion conductor layer and the functional protection layer is utilized, so that the cycle performance, the cycle life and the safety of the lithium metal battery are obviously improved, and the problem of lithium dendrites in the lithium metal negative electrode is solved.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a multi-layer lithium metal battery negative electrode and a preparation method and preparation equipment thereof. Background technique [0002] Since the first batch of lithium-ion batteries mass-produced by Sony in 1991, the "rocking-chair battery" has become the fastest-growing lithium-ion battery in the market. The energy density and specific capacity of the existing lithium-ion batteries are gradually approaching their theoretical limits. . With the rapid development of portable electronic devices and electric vehicle markets, traditional carbon anodes are gradually unable to meet people's increasing demand for energy density, and the search for new anode materials has become the development trend of the lithium battery industry in the future. Lithium metal has the lowest redox potential (-3.04V, relative to the standard hydrogen electrode) and extremely high spec...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/139
CPCH01M4/0423H01M4/13H01M4/139H01M2004/027Y02P70/50Y02E60/10H01M4/366H01M10/0565H01M4/382H01M4/134H01M10/052H01M4/1395H01M10/0562H01M4/62H01M2300/0068H01M2300/0082
Inventor 岳敏张世奇冯玮晶杨凯钱超
Owner SHENZHEN YANYI NEW MATERIALS CO LTD
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