Electrolyte solution and battery

Abstract

The invention relates to the field of energy storage materials, in particular to an electrolyte solution and a battery applying the electrolyte solution. The electrolyte solution is prepared from thefollowings: an electrolyte, an organic solvent and an additional agent, the organic solvent contains sec-butyl methyl carbonate, and thus the discharge capability of the battery at the low temperatureand the storage performance of the battery at the high temperature can be improved. In the optimized technical scheme, at least one of compounds including S=O groups can be further added into the electrolyte solution, the compounds including the S=O groups as the additional agent cooperates with the sec-butyl methyl carbonate, and thus the low-temperature circulating performance of the battery can be further improved.

Description

technical field [0001] This application relates to the field of energy storage materials, in particular, to an electrolyte and a battery. Background technique [0002] In the rapidly developing information age, the demand for mobile phones, notebooks, cameras and other electronic products is increasing year by year. As the working power source of electronic products, secondary batteries, especially lithium-ion secondary batteries, have the characteristics of high energy density, no memory effect, and high working voltage, and are gradually replacing traditional Ni-Cd and MH-Ni batteries. However, with the expansion of market demand for electronic products and the development of power and energy storage equipment, people's requirements for secondary batteries continue to increase, and the development of secondary batteries with high energy density and fast charging and discharging has become a top priority. At present, the effective methods are to increase the voltage and co...

AI Technical Summary

Problems solved by technology

[0003] At present, the electrolytes widely used in lithium-ion secondary batteries include those with lithium hexafluorophosphate as the electrolyte salt and a mixture of cyclic carbonates and chain carbonates as organic solvents. However, the above electrolytes have many deficiencies, especially In a low temperature environment, the charge and discharge performance of the secondary battery rapidly decays and the high temperature storage performance is poor

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