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Ultrathin metal lithium electrode, preparation method thereof, and application of ultrathin metal lithium electrode as negative electrode of primary lithium battery

An ultra-thin metal, lithium electrode technology, applied in primary batteries, electrode carriers/current collectors, battery electrodes, etc., can solve the problem of low energy density of primary lithium batteries, achieve industrialization and practicality, huge application market, good safety effect

Active Publication Date: 2021-06-08
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the capacity mismatch between the metal lithium negative electrode and the positive electrode in the primary lithium battery, and the low energy density and safety problems of the primary lithium battery caused by excessive metal lithium. The first aspect of the present invention provides an ultra-thin metal lithium electrode, comprising A metal lithium layer and a current collector layer, the metal lithium layer is covered on the surface of the current collector layer, the thickness of the metal lithium layer is between 1 μm and 100 μm, and the metal lithium layer includes metal lithium and additional components , the added components include: inorganic materials containing halogen functional groups on the surface, and / or inorganic materials capable of being compatible with liquid metal lithium or lithium alloys

Method used

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  • Ultrathin metal lithium electrode, preparation method thereof, and application of ultrathin metal lithium electrode as negative electrode of primary lithium battery
  • Ultrathin metal lithium electrode, preparation method thereof, and application of ultrathin metal lithium electrode as negative electrode of primary lithium battery
  • Ultrathin metal lithium electrode, preparation method thereof, and application of ultrathin metal lithium electrode as negative electrode of primary lithium battery

Examples

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Embodiment 1

[0032] This embodiment provides a preparation method of the ultra-thin metal lithium electrode of the present invention, such as figure 1 shown, including steps:

[0033] Heating step S101: heating and melting metal lithium or lithium alloy in an inert gas environment to obtain liquid metal lithium;

[0034] Mixing step S102: adding additional components into the liquid lithium metal, mixing and dispersing to obtain a mixed lithium slurry;

[0035] Covering step S103: coating the mixed lithium slurry on the current collector layer to form a thin film layer, and after the thin film layer is cooled and solidified, an ultra-thin metal lithium electrode is obtained.

Embodiment 2

[0037] This embodiment provides another embodiment of the preparation method of the ultra-thin metal lithium electrode of the present invention, such as figure 2 shown, including steps:

[0038] Mixing step S104: in an inert gas environment, physically mix the metal lithium or lithium alloy with the added components to obtain a mixture;

[0039] Heating step S105: heating the mixture until the metal lithium is melted to obtain a mixed lithium slurry;

[0040]Covering step S106: coating the mixed lithium slurry on the current collector layer to form a thin film layer, and after the thin film layer is cooled and solidified, an ultra-thin metal lithium electrode is obtained.

[0041] In Examples 1 and 2, the lithium alloy contains alloying elements that reduce the surface tension of liquid metal lithium, and the alloying elements include: Mg, Al, In, Zn, Ag, Ca, Sr, Ba, Sc, Y, Rh, One or more of Ir, Pd, Pt, Au, Cd, Hg, Ga, Tl, Ge, Pb, As, Sb, Bi, B, S, Se or Te. Alloying elem...

Embodiment 3

[0047] This embodiment provides a specific implementation method in Example 1, using the transition metal carbide titanium carbide (Ti) containing the alloying element Mg and the added component -F functional group 3 C 2 F) as an example, specifically illustrate the preparation method of the ultra-thin metal lithium electrode of the present invention, comprising steps:

[0048] Heating step: In an atmosphere of argon (purity greater than 99.999%), add 400 mg of metallic lithium block into a stainless steel pot and heat to 200° C. to melt the metallic lithium block into a liquid state.

[0049] Mixing steps: keep the heating temperature, first add 40mg metal magnesium flakes to the liquid metal lithium, then add 50mg Ti 3 C 2 F, stirring and mixing, the metal magnesium flakes are melted to form a liquid lithium-magnesium alloy, and the stirring is continued for about 30 minutes to make the Ti 3 C 2 F is evenly dispersed to obtain a gel-state mixed lithium slurry;

[0050] ...

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Abstract

The invention discloses an ultrathin metal lithium electrode, a preparation method thereof, and application of the ultrathin metal lithium electrode as a primary lithium battery cathode. The ultrathin metal lithium electrode comprises a metal lithium layer and a current collector layer, the metal lithium layer is loaded on the surface of the current collector layer, the thickness of the metal lithium layer is between 1 [mu]m and 100 [mu]m, the metal lithium layer comprises metal lithium and additive components, and the additive components comprise an inorganic material of which the surface contains halogen element functional groups, and / or an inorganic material which can be compatible with liquid metal lithium or lithium alloy. The thickness of the metal lithium layer in the ultrathin metal lithium electrode is adjustable, a novel primary lithium battery with matched positive and negative electrode capacities can be manufactured, and due to the fact that the ultrathin metal lithium electrode does not contain excessive metal lithium, the ultrathin metal lithium electrode has better safety and higher energy density.

Description

technical field [0001] The invention relates to a primary lithium battery, in particular to an ultra-thin metal lithium electrode and its preparation and use as a negative electrode of the primary lithium battery. Background technique [0002] Primary lithium batteries generally use metal lithium sheets as the negative electrode, and metal lithium has a very high theoretical specific capacity (3860mAh g -1 ), low density (0.59g·cm -3 ) and the most negative electrochemical potential (about -3.04V compared to the standard hydrogen electrode), this type of battery has high energy density, high open circuit voltage, stable discharge voltage, can withstand harsh environments, and has good storage properties, etc. Advantages, it has a wide range of uses in both military and civilian use, such as electronic meter measurement, information storage, Beidou navigation, shared transportation, public security monitoring, oil logging, well completion and cementing, oil and gas transmiss...

Claims

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Application Information

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IPC IPC(8): H01M4/06H01M4/08H01M4/62H01M4/66H01M6/00
CPCH01M4/06H01M4/08H01M4/667H01M4/62H01M6/00
Inventor 杨树斌
Owner BEIHANG UNIV
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