Ningde Amperex Technology Limited

Yuansen Xie

Hang Cui

Daoyi Jiang

Zhihuan Chen

Jiali Dong

Jia Tang

Pengyang Feng

Ting Yi

Chengbo Zhang

Maohua Chen

Lihong He

Fan Yang

Chao Wang

Yisong Su

Hongmei Wei

Wenbo Jin

Qunchao Liao

Peng Du

Taiqiang Chen

Xiaoping Lin

Yuxin Cai

Congrong Chen

Yuhao Lu

An anode material includes a lithiated silicon oxide material, an inorganic coating layer, and a polymer coating layer, wherein the inorganic coating layer and the lithiated silicon oxide material at least have Si—O-M bonds therebetween, and M includes at least one of an aluminum element, a boron element, and a phosphorus element. The anode material has high water stability, high first coulombic efficiency, and good cycle stability.

Anode material, electrochemical device and electronic device including the same

An anode material having 0.8≤0.06×(Dv50)−2.5×Dv50+Dv99≤12 (1); and 1.2≤0.2×Dv50−0.006×(Dv50)+BET≤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 μm and BET is expressed in m/g. The anode material is capable of significantly improving the rate performance of electrochemical devices.

Anode material, anode and electrochemical device comprising the anode material

An anode material includes silicon-containing particles including a silicon composite substrate and an oxide MeOlayer, wherein the oxide MeOlayer is coated on at least a portion of the silicon composite substrate, wherein Me includes at least one of Al, Si, Ti, Mn, V, Cr, Co or Zr, and y is 0.5 to 3; and wherein the oxide MeOlayer includes a carbon material. The anode material has good cycle performance, and the battery prepared from the anode material has better rate performance and lower swelling rate.

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 material includes a silicon composite substrate. In the X-ray diffraction pattern of the anode material, the highest intensity at 2θ within the range of 28.0° to 29.0° is I, and the highest intensity at 2θ within the range of 20.5° to 21.5° is I, wherein 0<I/I≤1. The anode material has good cycle performance, and the battery prepared with the anode material has better rate performance and a lower swelling rate.

Anode material, electrochemical device and electronic device comprising the same

An electronic device, a charging method for an electrochemical device, a terminal and a storage medium. The electronic device includes an electrochemical device that satisfies the following features: in a first stage of a charging process, a state of charge (SOC) of the electrochemical device being less than or equal to X, 70%≤X<100%. An average charging current when the SOC of the electrochemical device is less than or equal to 40% is A, an average charging current when the SOC of the electrochemical device is between 40% and X is B, and A<B. The electronic device can improve the cycle life of the corresponding electrochemical device with a charging time close to that of the current fast charging.

Electronic device, charging method for electrochemical device, terminal and storage medium

A negative electrode plate includes a three-dimensional framework structure. The three-dimensional framework structure includes fibers and rigid particles. Mohs hardness of the rigid particles is greater than or equal to 2, and an elastic modulus of the rigid particles is greater than or equal to 40 Gpa. The three-dimensional framework structure can mitigate volume expansion of the negative active material during cycling. On the other hand, the rigid particles help to stabilize the three-dimensional framework structure and can serve as a lithium wetting material to induce lithium to deposit inside the three-dimensional framework, thereby reducing the generation of lithium dendrites and improving safety performance and cycle performance of the formed electrochemical device.

Negative electrode plate, electrochemical device, and electronic device

An anode material includes a silicon composite substrate, wherein the D50 of the silicon composite substrate is from 2.5 μm to 15 μm, and the particle size distribution of the silicon composite substrate meets 0.1≤Dn10/Dv50≤0.6. The anode material has good cycle performance, and the battery prepared with the anode material has good rate performance and lower swelling rate.

A negative electrode material of this application includes silicon-based particles, where the silicon-based particles include: a silicon oxide SiO, where x is 0.5 to 1.6; and a carbon layer, where the carbon layer covers at least a portion of a surface of the silicon oxide SiO. In a Raman spectrum, a ratio of a height Iof the silicon-based particles at a peak of 1350 cmto a height Iat a peak of 1580 cmsatisfies 0<I/I<5, and a ratio of a height Iat a peak of 510 cmto the height Iat the peak of 1350 cmsatisfies 0<I/I<12. A lithium ion battery prepared from the negative electrode active material has improved first efficiency, cycling performance, and rate performance.

Negative electrode material and electrochemical apparatus and electronic apparatus containing the negative electrode material

A negative electrode material includes a silicon-based material and a carbon material. Peaks with a shift range of 1255˜1355 cmand 1575˜1600 cmin a Raman spectrum of the carbon material are a D peak and a G peak respectively. Peaks with a shift range of 1255˜1355 cmand 1575˜1600 cmin a Raman spectrum of the silicon-based material are the D peak and the G peak respectively. A scattering peak intensity ratio of D versus G peaks of the carbon material is A, and a scattering peak intensity ratio of D versus G peaks of the silicon-based material is B. 0.15≤A≤0.9, 0.8≤B≤2.0, and 0.2<B−A<1.8.

Negative electrode material, negative electrode plate, electrochemical device, and electronic device

A negative electrode includes a negative current collector, a first negative active material layer and a second negative active material layer. The first negative active material layer is arranged on one side of a first portion of the negative current collector, and the second negative active material layers are arranged on two sides of a second portion, different from the first portion, of the negative current collector. A ratio of a weight per unit area of the first negative active material layer to a weight per unit area of the second negative active material layer on the negative current collector is 0.47 to 0.52, and a ratio of a compacted density of the first negative active material layer to a compacted density of the second negative active material layer is 0.9 to 1.1.

Negative electrode and electrochemical apparatus containing same, and electronic apparatus

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

A negative electrode includes silicon-based particles and graphite particles, where a quantity of graphite particles present within a vertical distance of about 0 to 6 μm to respective edges of the silicon-based particles is N, and based on a total quantity of the silicon-based particles, more than about 50% of the silicon-based particles satisfy: 6≤N≤17. The negative electrode has good cycle performance, and a battery prepared by using the negative electrode has good rate performance and a low deformation rate.

Negative electrode, and electrochemical apparatus and electronic apparatus including same

An anode material includes a silicon compound SiO, where x is about 0.5 to 1.5; an oxide MeOlayer, the MeOlayer coating the silicon compound SiO, where y is about 0.5 to 3; and a carbon layer, the carbon layer coating the MeOlayer. Me includes at least one of Al, Si, Ti, Mn, V, Cr, Co, and Zr. The surface of the MeOlayer adjacent to the carbon layer has an open pore structure, and at least part of the open pore structure is filled with the carbon layer. The anode material improves the cycle performance of the electrochemical device and significantly reduce the impedance of the electrochemical device.

Anode material, electrochemical device and electronic device using the same

The present application relates to an anode active material and a preparation method thereof, and a device using the anode active material. The anode active material provided by the present application includes anode active particles having silicon element, a first conductive material and a second conductive material, wherein the first conductive material and the second conductive material form a three-dimensional conductive network structure, at least a portion of the anode active particles are accommodated in the three-dimensional conductive network structure, and a ratio of the total surface area of the first conductive material to the total surface area of the anode active particles is less than 1000. The capacity retention rate and expansion ratio of the anode active material with progression of the cycle are significantly improved.

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Ningde, China

Yuansen Xie