Battery

Abstract

The application relates to the field of the energy storage material, and specifically relates to a battery. The battery disclosed by the invention comprises a positive pole plate, a negative pole plate, an isolating membrane and electrolyte arranged between the positive pole plate and the negative pole plate; the positive pole plate contains the positive active material, the electrolyte comprisesorganic solvent, electrolyte and additives; the positive active material is the ternary positive material, and the additives comprise polyphosphazenes compound and fluorinated bis-oxalate phosphate. The electrolyte in the battery disclosed by the application can reduce the erosion on a positive interface by the HF and protect the positive interface, inhibit the impedance increasing of the positiveand negative interfaces, and improve the cyclic storage life, thereby improving the high-voltage circulating performance and high-temperature storage performance of the battery.

Description

Technical field [0001] This application relates to the field of energy storage materials, and specifically to a battery. Background technique [0002] In the rapidly developing information age, the demand for mobile phones, notebooks, cameras and other electronic products has increased year by year. As the working power source of electronic products, 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. [0003] Ternary cathode materials have the advantages of high energy density, high discharge voltage, and good low-temperature performance, but there are two common problems: one is the poor cycle performance of the battery, which cannot meet people's requirements for long-life batteries, and the other is the battery The flatulence is more serious during high-temperature storage, and there is a safety risk. In addition, th...

AI Technical Summary

Problems solved by technology

[0003] Ternary cathode materials have the advantages of high energy density, high discharge voltage, and good low-temperature performance, but there are generally two problems: one is that the cycle performance of the battery is poor, which cannot meet people's requirements for long-life batteries; During the high-temperature storage process, the flatulence is serious, which poses a safety risk. In addition, the capacity declines rapidly during the high-temperature storage process.

Images