Negative electrode for lithium metal battery and lithium metal battery including the same

A lithium metal battery, lithium metal electrode technology, applied in the direction of battery electrodes, lithium batteries, electrode current collector coating, etc., can solve the problems of lithium secondary batteries to reduce cycle characteristics and stability, and achieve increased charge-discharge cycle , The effect of improving cycle characteristics

Active Publication Date: 2017-01-04
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a lithium secondary battery including such a lithium electrode may have reduced cycle characteristics and stability

Method used

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  • Negative electrode for lithium metal battery and lithium metal battery including the same
  • Negative electrode for lithium metal battery and lithium metal battery including the same
  • Negative electrode for lithium metal battery and lithium metal battery including the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0084] According to an exemplary embodiment, R in the silsesquioxane of the cage structure 1 -R 8 It can be eight isobutyl. For example, the cage-structure silsesquioxane may be octaisobutyl-t8-silsesquioxane.

[0085] The inorganic particles and / or organic-inorganic particles may have various shapes. For example, the inorganic particles and / or organic-inorganic particles may have a spherical shape, an elliptical shape, a cubic shape, a tetrahedral shape, a pyramidal shape, an octahedral shape, a cylindrical shape, a polygonal columnar shape, a conical shape, a columnar shape, a tube shape , spiral, funnel, dendritic, or any of a variety of ordinary regular and irregular shapes.

[0086] The inorganic particles and / or organic-inorganic particles may be present in an amount of about 10 parts by weight to about 200 parts by weight, such as about 50 parts by weight to about 100 parts by weight, based on about 100 parts by weight of the first polymer. While not wishing to be b...

Embodiment 1

[0226] Embodiment 1: the preparation of negative electrode

[0227] 10 grams (g) of polyvinyl alcohol (with 93.5×10 3 A weight-average molecular weight in Daltons (Da), a degree of saponification of about 99 mole percent (mol%), and a degree of polymerization of 1,700) was dissolved in 10 g of acrylonitrile and 100 milliliters (ml) of dimethyl sulfoxide (DMSO). Then 0.01 g of potassium persulfate was added thereto, and a stirring process was performed at about 60° C. for 5 hours to carry out a graft reaction of polyvinyl alcohol and acrylonitrile.

[0228] After completion of the reaction, unreacted acrylonitrile remained by separating from the reaction product by dissolving the reaction product with dimethylformamide several times, followed by adding water and dimethylformamide to obtain a precipitate and purifying the precipitate. The resulting product was dried at 40° C. for 34 hours to obtain a polyvinyl alcohol acrylonitrile graft copolymer. The amount of acrylonitrile ...

Embodiment 2

[0231] Embodiment 2: the preparation of negative electrode

[0232] An anode was prepared in the same manner as in Example 1, except that the protective film forming composition was diluted about 10 times and the protective film had a thickness of about 1 μm.

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Abstract

A negative electrode for a lithium metal battery, the negative electrode including: a lithium metal electrode; and a protection film disposed on at least a portion of the lithium metal electrode, wherein the protection film includes at least one first polymer selected from a polyvinyl alcohol graft copolymer, a crosslinked copolymer formed from the polyvinyl alcohol graft copolymer, a polyvinyl alcohol crosslinked copolymer, and a blend thereof.

Description

technical field [0001] The present disclosure relates to negative electrodes for lithium metal batteries and lithium metal batteries including the same. Background technique [0002] Lithium secondary batteries are high-performance secondary batteries having the highest energy density among currently available secondary batteries, and thus can be used in various practical applications such as electric vehicles. [0003] A lithium secondary battery may include a lithium metal electrode as a negative electrode. Lithium metal electrodes have high electric capacity per unit weight, and thus batteries including lithium electrodes can have high electric capacity. However, when such a lithium electrode is used as a negative electrode, the lithium electrode may react with the liquid electrolyte during charge and discharge processes, and due to the high reactivity of lithium, this reaction may cause dendrite formation. Accordingly, a lithium secondary battery including such a lith...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/134H01M10/052H01M50/417H01M50/426H01M50/491
CPCH01M4/134H01M10/052H01M2004/027H01M2220/20H01M50/491H01M50/426H01M50/417H01M4/1395H01M4/366H01M10/0568H01M10/0569Y02E60/10H01M50/446H01M50/46Y02P70/50H01M4/0402H01M4/0404H01M4/0471H01M4/131H01M4/1391H01M4/382H01M4/623H01M4/661H01M10/0525H01M10/0585H01M10/4235H01M2004/021H01M2004/028H01M2300/0034H01M2300/0037
Inventor 梁有盛丁准善
Owner SAMSUNG ELECTRONICS CO LTD
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