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Electrolyte for fluorine ion battery

A technology of fluoride ion and electrolyte, which is applied in the field of high energy density fluoride ion battery and its electrolyte, can solve the problems of low conductivity of fluorine electrolyte, limit the application and development of fluoride ion battery, and achieve a good degree of fluoride salt dissociation , high energy density, high conductivity

Active Publication Date: 2021-06-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fluorine electrolyte used in it has low conductivity at normal temperature, and the conductivity of fluoride ion reaches 2.8×10 only at 160°C. -4 S / cm, it can work normally, which greatly limits the application and development of fluoride ion batteries

Method used

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  • Electrolyte for fluorine ion battery
  • Electrolyte for fluorine ion battery
  • Electrolyte for fluorine ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The electrolyte is based on the fluoride salt (cation (structural formula 1), anion F - ), acetonitrile is mixed according to the mass ratio of 10: 90. The conductivity test configurations are reported in Table 2. The results of the battery tests using this electrolyte are reported in Table 1.

Embodiment 2

[0054] The electrolyte is based on the fluoride salt (cation (structural formula 2), anion F - ), the solvent (structural formula 7) is mixed according to the mass ratio of 10:90. The conductivity test configurations are reported in Table 2. The results of the battery tests using this electrolyte are reported in Table 1.

Embodiment 3

[0056] The electrolyte is based on the fluoride salt (cation (structural formula 3), anion F - ), the solvent (structural formula 8) is mixed according to the mass ratio of 10:90. The conductivity test configurations are reported in Table 2. The results of the battery tests using this electrolyte are reported in Table 1.

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Abstract

The invention provides an electrolyte for a fluorine ion battery. The electrolyte comprises villiaumite and a solvent, the positive ions in the main component villiaumite have conjugated large pi ring and form a highly delocalized structure with quaternary ammonium ions, and the positive charges are highly dispersed in each structure of the positive ions, so that the bonding force between the positive charges and the fluorine ions is smaller; and compared with the electrolyte in the prior art, the dissociation degree of the villiaumite is better, the conductivity of the electrolyte is higher, and the fluorine ion battery can operate at room temperature and has higher energy density.

Description

technical field [0001] The invention belongs to the field of chemical power sources, and in particular relates to a high-energy-density fluoride ion battery and its electrolyte. Background technique [0002] At present, lithium-ion batteries, as the current mainstream secondary battery technology, have been widely used in industries such as consumer electronics, electric vehicles, and large-scale energy storage, and have greatly improved human life. However, its energy density is still unable to meet the growing demand of human beings for long battery life. At the same time, the electrochemistry of metallic lithium or lithium-containing electrodes has some problems in commercial applications. Lithium metal has high activity, and the stability and safety of the battery is not good. It is easy to overcharge or overdischarge. In extreme cases, it will cause thermal runaway, battery rupture, or even short-circuit explosion. [0003] Fluoride-ion batteries have attracted people...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0568H01M10/0569
CPCH01M10/0568H01M10/0569H01M2300/0045H01M2300/0028Y02E60/10
Inventor 曲超张洪章李先锋刘翠连张华民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI