Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology (Hong Kong) Limited

Yuanyuan Li

Rui Shen

Libing He

Changlong Han

Chenghua Fu

Bin Jiang

A composite artificial graphite includes a first graphite and a second graphite. The first graphite includes secondary particles and has a graphite interlayer spacing dof 0.33560 nm to 0.33610 nm. The second graphite includes primary particles and has a graphite interlayer spacing dof 0.33620 nm to 0.33670 nm. A mass percentage of the first graphite in the composite artificial graphite is 40% to 90%.

Composite artificial graphite and preparation method thereof, and secondary battery and power consuming device comprising the composite artificial graphite

The present application provides a secondary battery, an electrolyte, and an apparatus including the secondary battery. The secondary battery of the present application includes an electrolyte, characterized in that the electrolyte includes an organic solvent, and the organic solvent includes a cyclic carbonate and a chain carbonate; the mass ratio of the cyclic carbonate and the chain carbonate is from 25:75 to 32:68; the chain carbonate includes dimethyl carbonate; the mass percentage of the dimethyl carbonate in the chain carbonate is greater than or equal to 9 wt % and less than 50 wt %; wherein based on the total mass of the organic solvent, the mass percentage of a carboxylic acid ester is less than 5 wt %. The secondary battery of the present application can simultaneously obtain excellent low-temperature power, long service life and cycle performance.

Secondary battery, electrolyte, and apparatus comprising the secondary battery

This application provides a negative electrode plate, including an active layer 1 and an active layer 2. The active layer 1 contains an active material 1, and the active layer 2 contains an active material 2. A powder OI value of the active material 1 falls in a range of 8 to 32, and a powder OI value of the active material 2 falls in a range of 2 to 7. A gram capacity of the active material 1 falls in a range of 290 to 350 mAh/g, and a gram capacity of the active material 2 falls in a range of 350 to 368 mAh/g. A ratio α of the powder OI value between the active material 1 and the active material 2 falls in a range of 2.00 to 6.25.

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Ningde, China

Yuanyuan Li