Ternary oxygen-based electrolyte and preparation and application thereof

Abstract

The invention relates to a ternary oxygen-based electrolyte and preparation and application thereof, the electrolyte comprises the following general formula I: in the general formula I, R, R1, R2 and R3 are independently a first ring or a first chain containing at least one atom, and R1, R2 and R3 can be H or none; any one or two atoms of R, R1, R2 and R3 are connected with-E2-OBF3M and-E3-OBF3M; the structural formula is shown in the description; r, R1, R2 and R3 can be independently connected with a first substituent group; e1, E2 and E3 are independently null, a second ring or a second chain containing at least one atom; the first ring and the second ring may be a carbocyclic ring or a heterocyclic ring; the first and second chains may be carbon chains or heterochains. The boron trifluoride salt provided by the invention can be used as an additive in a battery, and can be used as a single ion conductor and a polymer framework after being polymerized for a polymerizable monomer. The boron trifluoride salt can be applied to a liquid electrolyte, a gel electrolyte, a mixed solid-liquid electrolyte, a quasi-solid electrolyte and an all-solid electrolyte, and the effect is good.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a ternary oxygen-based electrolyte and its preparation and application. Background technique [0002] Electrolyte is an important and necessary component of batteries. Batteries have the advantages of high energy density, high voltage, many cycles, and long storage time. Since commercialization, they have been widely used in electric vehicles, energy storage power stations, drones, and portable devices. Regardless of the application direction, it is urgent to improve the energy density and cycle performance of the battery under the premise of ensuring the safety of the battery. [0003] The current development of liquid batteries mainly includes positive electrodes, negative electrodes, electrolytes and separators. To improve the energy density of the batteries is to increase the working voltage and discharge capacity of the batteries, that is, to match the high-voltage and hig...

AI Technical Summary

Problems solved by technology

In the prior art, there are only very few researchers who are concerned about the 3 sporadic studies on compounds with a BF 3 At present, there are not many achievements, let alone the achievements of industrial applications; there are few existing technologies for -OBF 3 The research on the M group, and there is no research on the group containing two, three or more -OBF 3 M group research published

This is also because of -OBF 3 The presence of M is strong, if -OBF is added to the molecule 3 The number of M may have unpredictable changes to the overall properties of the entire molecular structure. Therefore, if the research team conducts a study containing two, three or more -OBF 3 In the research of M, the resistance will be greatly increased, the time cost and economic cost may be extremely high, and the results are not easy to predict. Therefore, the research team has only studied the 3 M conduct research

Even for pairs containing an -OBF 3 M conducts research, because there are very few existing technologies, and the reference value is also very small, and there is no source of reference for the research of two, three or more groups.

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