Modified electrolyte for lithium-carbon fluoride battery

Abstract

The invention relates to a modified electrolyte for a lithium-carbon fluoride battery. The modified electrolyte comprises an electrolyte for the commercialized lithium-carbon fluoride battery, and is characterized in that an additive with a concentration of 0.4-0.8 mol / L is prepared in the electrolyte for the commercialized lithium-carbon fluoride battery, wherein the additive is a compound containing N-O chemical bonds. According to the modified electrolyte disclosed by the invention, the compound containing the N-O chemical bonds are added to the electrolyte for the commercialized lithium-carbon fluoride battery as the additive, so that the voltage lag phenomenon of the lithium-fluoride carbon battery in the initial discharge period can be improved, and the battery rate discharge performance can be greatly improved; a wide range of compounds containing N-O chemical bonds can be used as the additive, and the operation method in the addition process is very simple, so that the cost of the electrolyte can be reduced, and large-scale production can be easily implemented.

Description

technical field [0001] The invention belongs to the technical field of lithium-carbon fluoride batteries, in particular to a modified electrolyte solution for lithium-carbon fluoride batteries. Background technique [0002] There are many kinds of metal lithium primary batteries, with high specific energy and working voltage. At present, the more mature systems mainly include lithium-manganese dioxide batteries, lithium-thionyl chloride batteries, lithium-sulfur dioxide batteries, etc., and the energy density can generally reach 250-350Wh / kg. In recent years, lithium-carbon fluoride batteries, which belong to the metal lithium primary battery system, have attracted much attention due to their higher energy density. At present, the energy density of lithium-carbon fluoride batteries can reach 500Wh / kg, and they have a large Room for improvement. However, when the lithium-carbon fluoride battery is working, the discharge voltage is increased with the generation of the conduc...

AI Technical Summary

Problems solved by technology

However, when the lithium-carbon fluoride battery is working, the discharge voltage is increased with the generation of the conductive carbon of the reaction product, which leads to the voltage hysteresis phenomenon in the initial discharge of the lithium-carbon fluoride battery, which restricts the rate of the lithium-carbon fluoride battery. Improved discharge performance

[0003] At present, in order to improve the obvious voltage hysteresis problem in the early stage of discharge of lithium-carbon fluoride batteries, those skilled in the art have conducted a lot of research on the optimization of fluorinated carbon materials, which have improved the obvious voltage hysteresis problem in the initial stage of discharge of lithium-carbon fluoride batteries to varying degrees. Voltage hysteresis problem, but due to expensive raw materials and strict requirements on the production process of materials, the production cost of lithium-carbon fluoride batteries is increased, and it is difficult to achieve large-scale production

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