A gelable system for lithium-air batteries and its preparation method and application

Abstract

The invention discloses a gellable system for a lithium-air battery, a gel and / or solid electrolyte prepared from the gellable system, and a preparation method and application of the gellable system.The system comprises the following components: (a) a lithium salt; (b) an ether compound; and (c) an electrolyte or a solvent thereof for the lithium-air battery. By adjusting the constituent contentsand varieties of the lithium salt, the ether compound and the electrolyte or the solvent thereof for the lithium air battery in the system, the gel and / or solid electrolyte with adjustable intensity,adjustable formation time, adjustable transition temperature and reversibility can be prepared. The preparation method is simple in process, mild in reaction conditions, short in reaction period, high in product yield, low in preparation cost and easy to realize industrial production. The prepared gel and / or solid electrolyte can be applied to fields like lithium air batteries.

Description

Technical field [0001] The present invention belongs to the technical field of a gel electrolyte, particularly relates to gelling system and its preparation method and application for a lithium-air battery. Background technique [0002] In recent years, excessive consumption of fossil fuels has caused the energy crisis and environmental problems, a large number of vehicle emissions cause global warming is increasing and fog and haze, these problems have seriously affected the production of human life. Is a clean energy and electrical energy can be achieved by recycling a rechargeable battery, since lithium has a high voltage platform, a high energy density, long cycle life and low self-discharge and other advantages, which can be applied not only in portable electronic devices, for example: digital cameras and portable computers and other equipment, but also in terms of power tools, electric vehicles, also has a wide range of applications. [0003] The most commonly used lithium ...

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Problems solved by technology

[0004] In order to overcome the leakage and flammability of liquid electrolytes, inorganic solid electrolytes, polymer solid electrolytes, and polymer gel electrolytes have been widely studied. Among them, the inorganic solid electrolyte is a lithium salt containing inorganic superionic conductivity. ; Polymer solid electrolyte is a conductive solid composed of polymer and lithium salt, but the conductivity of the currently reported solid electrolyte is not good, which seriously affects the cycle performance of the prepared battery

[0005] Although the polymer gel electrolyte has good conductivity, and its porous structure can effectively inhibit the volatilization and leakage of the electrolyte, however, the preparation of the polymer gel electrolyte reported so far is to introduce polymer or The small molecule organic gel factor with relatively complicated synthesis steps is in the conventional electrolyte, and the obtained polymer gel electrolyte needs to be in a fluid state at a relatively high temperature, and is in a gel state at a low temperature, which makes injection When injecting liquid, high-temperature liquid injection is required, which increases the complexity of the experimental operation. In addition, the transition temperature of the prepared polymer gel electrolyte is relatively low, and the gel state is relatively easy to be destroyed. Once the gel is destroyed , cannot be reused, greatly increasing the cost

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