Electrolyte and lithium-ion battery

Abstract

The invention provides electrolyte which is prepared from 0.5 to 4mol / L inorganic lithium salt, 3 to 15wt% of silane modified inorganic filler and solvent, wherein silane used by the silane modified inorganic filler is YSiX3, the Y is chosen from alkyl, oxo alkyl, amino or phenyl, and the X is chosen from alkyl or alkoxy; inorganic filler used by the silane modified inorganic filler is chosen from one or several of silicate, carbonate, carbide, sulfate, sulfide, titanate, oxide, hydroxide and metal inorganic filler. The electrolyte disclosed by the invention is semi-solid state or quasi-solid state electrolyte. Silane modified aluminum oxide is added into the electrolyte disclosed by the invention to improve viscosity of liquid state electrolyte, reduce solution fluidity and avoid the hidden danger that liquid state solution is prone to leaking; furthermore, battery safety is improved; the electrolyte can bear higher voltage. The invention further provides a lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular to an electrolyte and a lithium ion battery. Background technique [0002] Lithium-ion battery is the rechargeable chemical battery with the best technical performance in the world. It has the advantages of high working voltage, large specific energy, long cycle life, small self-discharge, no memory effect, and no pollution. It is widely used in mobile communications, notebooks, etc. Computers, portable tools, electric bicycles and other fields. [0003] As people pay more and more attention to environmental protection, lithium-ion batteries are the main direction of new energy development as energy storage devices. For example, the Chinese patent with publication number CN106684448A discloses a preparation method for high-temperature resistant lithium battery electrolyte. The medium electrolyte has a long service life and good thermal stability, but there are still s...

AI Technical Summary

Problems solved by technology

[0003] As people pay more and more attention to environmental protection, lithium-ion batteries are the main direction of new energy development as energy storage devices. For example, the Chinese patent with publication number CN106684448A discloses a preparation method for high-temperature resistant lithium battery electrolyte. The medium electrolyte has a long service life and good thermal stability, but there are still safety problems that the liquid electrolyte is easy to leak, flammable, and explosive.

[0004] Therefore, people turn their attention to solid-state electrolytes, but all-solid-state electrolytes have low conductivity and poor electrochemical performance at room temperature. Therefore, it is necessary to develop an electrolyte with high safety and good practicability.

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