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Composite electrolyte for stabilizing lithium metal battery

A technology of composite electrolyte and lithium metal battery, applied in the field of composite electrolyte, can solve the problem that the performance of lithium metal negative electrode needs to be improved, etc.

Active Publication Date: 2021-09-10
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of the lithium metal negative electrode of this technical scheme still needs to be improved.

Method used

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  • Composite electrolyte for stabilizing lithium metal battery
  • Composite electrolyte for stabilizing lithium metal battery
  • Composite electrolyte for stabilizing lithium metal battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of composite electrolytic solution for stabilizing lithium metal battery, comprises lithium salt, organic solvent, composite additive, and described organic solvent comprises, 1,3-dioxolane accounts for 50% of described organic solvent total volume, ethylene dioxolane Alcohol dimethyl ether accounts for 50% of the total volume of the organic solvent, selects the anthrone violet 79 additive to account for 1% of the total mass of the electrolyte, and selects LiNO 3 The composite additive accounts for 1% of the total mass of the electrolyte, and the lithium salt is LiTFSI, and the lithium salt accounts for 18% of the total mass of the electrolyte.

[0033] The structure of the SEI film can be divided into an inorganic layer and an organic layer. The inorganic layer is mainly composed of inorganic components, which have better electrochemical performance and higher ionic conductivity; the organic layer is mainly composed of electrolyte decomposition and polymerization...

Embodiment 2-7

[0037]Examples 2-7 The ratio of the lithium metal battery electrolyte is shown in Table 2. In these examples, the electrolyte is prepared by dissolving 1.0M lithium salt in an organic solvent, adding inorganic additives and organic additives, and stirring at 50°C for 24 hours. Electrolyte, all reagents do not need to be further purified, all processes are prepared in a glove box (MbraunLabmaster glove box workstation), and the mass fraction of oxygen and water in the high-purity argon glove box is lower than 0.1ppm. Six kinds of electrolytes were injected into CR2032 button system lithium-ion batteries, and their cycle performance data were tested at room temperature.

[0038] Each data list of table 2 embodiment 2-7

[0039]

[0040] Embodiment 2-7 is lithium | lithium symmetric battery cycle data (current density 5mAh / cm 2 , capacity 1mAh / cm 2 )like Figure 3-Figure 8 shown.

[0041] image 3 Be the lithium of embodiment 2|Lithium symmetric battery cycle data, at cur...

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Abstract

The invention discloses a composite electrolyte for stabilizing a lithium metal battery, and belongs to the field of lithium metal batteries. The composite electrolyte not only can be used as an adsorption site for inducing the formation of a compact SEI layer, but also can form a conformal nano barrier layer for stabilizing a hybrid SEI film to inhibit generation of an electrode / electrolyte interface side reaction. The stability of the cathode material structure in the cycle process is improved, and the cycle life of the cathode material is effectively prolonged. The composite electrolyte comprises a lithium salt, an organic solvent and a composite additive, and the electrolyte suitable for the alkali metal battery is obtained through matching of all the components according to the proportion.

Description

technical field [0001] The invention belongs to the field of lithium metal batteries, in particular to a composite electrolyte for stabilizing lithium metal batteries. Background technique [0002] Polycyclic aromatic hydrocarbons (PAHs) refer to a class of organic compounds with two or more benzenes, including more than 150 compounds such as naphthalene, anthracene, phenanthrene, and pyrene. Among them, discotic polycyclic aromatic hydrocarbons have a graphene microstructure and many excellent physical and chemical properties, and have broad application prospects in the fields of organic semiconductor materials, luminescent materials, solar cells, photodiodes, etc. In recent years, the synthesis of graphene microstructure PAHs have become a research hotspot in organic chemistry, physical chemistry and materials chemistry. [0003] Among lithium metal batteries, lithium-ion batteries are driving the development of portable electronic devices and electric vehicles, but the c...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0569H01M10/052
CPCH01M10/0567H01M10/0569H01M10/052H01M2300/0025H01M2300/0042Y02E60/10
Inventor 李爱东张会刚昌绍忠房佳斌金鑫
Owner NANJING UNIV
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