Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology (hong Kong) Limited

Bo Cheng

Kai Wu

Yongkun Li

Feng Ju

Changlong Han

This application provides an electrolyte for lithium-ion battery, a lithium-ion battery, a battery module, a battery pack, and an apparatus. The electrolyte includes an organic solvent, an electrolytic lithium salt dissolved in the organic solvent, and additives, where the additives include a first additive and a second additive. The first additive includes an alkenyl dioxaborolane compound represented by formula I or formula II, and the second additive includes phosphoric acid cyclic anhydride represented by formula III. After the electrolyte of this application is applied to a lithium-ion battery, the lithium-ion battery can, at high voltage, have a good high-temperature cycling performance and high-temperature storage performance, a low direct current resistance, as well as good high-voltage characteristics.

Electrolyte for lithium-ion battery, lithium-ion battery, battery module, battery pack, and apparatus

In the embodiments of the present application, an electrolyte, a lithium-ion battery comprising the electrolyte, a battery module, a battery pack, and a device are provided. The electrolyte in the embodiments of the present application comprises an organic solvent, an electrolyte lithium salt dissolved in the organic solvent, and an additive comprising a first additive and a second additive. The first additive is selected from one or more of the compounds represented by formula I, and the second additive is selected from one or more of the compounds represented by formula II. After applying the electrolyte of the present application to a lithium-ion battery, the lithium ion battery has a better cycle performance and storage performance at a high temperature, and lower direct-current impedance at a low temperature, such that the lithium ion battery has both a better high-temperature performance and a better low-temperature performance.

Electrolyte, lithium-ion battery comprising electrolyte, battery module, battery pack and device

The present application relates to a composite material with a core-shell structure for battery, wherein the core is made of a core material including metallic copper or a copper-containing compound; the shell is made of a shell material including at least one of silicon dioxide and titanium dioxide; and the core material has an average particle size D50 of 0.01 μm-5 μm, optionally 0.1 μm-3 μm, and more optionally 0.1 μm-2 μm. The present application also relates to secondary battery containing the composite material, a battery module, a battery pack, and an apparatus.

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Ningde, China

Bo Cheng