Ningde Amperex Technology Limited

Pengyang Feng

Yuansen Xie

Jiali Dong

Jia Tang

Yuxin Cai

A negative electrode active material having a median particle size Dv50, the negative electrode active material has a median particle size Dv50 after being compressed under a pressure of 1 t, and Dv50/Dv50 is not less than 0.8. The negative electrode active material achieves a balance between high capacity and high cycle expansion performance of an electrochemical device.

Negative electrode active material and electrochemical device and electronic device using the same

An anode including a current collector and an anode active material layer disposed on the current collector are provided. The anode active material layer includes first oriented particles having a first tilt angle θinclined with respect to the direction parallel to the current collector, and second oriented particles having a second tilt angle θinclined with respect to the direction parallel to the current collector. The first tilt angle θand the second tilt angle θare different and both not greater than 70°.

Anode, and electrochemical device comprising the same

An anode including a current collector and an anode active material layer on the current collector are provided. The anode active material layer includes first oriented particles having a first tilt angle θinclined with respect to the direction of the current collector, and second oriented particles having a second tilt angle θinclined with respect to the direction of the current collector. The first tilt angle θand the second tilt angle θare different and both not greater than 70°.

An anode material having 0.8&#x2264;0.06&#xd7;(Dv50)&#x2212;2.5&#xd7;Dv50+Dv99&#x2264;12 (1); and 1.2&#x2264;0.2&#xd7;Dv50&#x2212;0.006&#xd7;(Dv50)+BET&#x2264;5 (2), where Dv50 represents a value in the volume-based particle size distribution of the anode material that is greater than the particle size of 50% of the particles, Dv99 represents a value in the volume-based particle size distribution of the anode material that is greater than the particle size of 99% of the particles, and BET is a specific surface area of the anode material, wherein Dv50 and Dv99 are expressed in &#x3bc;m and BET is expressed in m/g. The anode material is capable of significantly improving the rate performance of electrochemical devices.

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Ningde, China

Pengyang Feng