Ningde Amperex Technology Limited

Xiamen Hithium Energy Storage Technology Co., Ltd.

Jianming Zheng

Chao Tang

Lilan Zhang

Junfei Liu

Xiexue Peng

Mingming Guan

Wenqiang Li

Qian Wen

Leimin Xu

Shuirong Zhang

Bin Wang

Molin Zhou

Chunrui Xu

Yali Xiong

Jianyu Liu

Jian Liu

Haiyang Nan

Hengtao Xia

Feng Gu

Hui Cui

Xiangling Zheng

Li Wenqiang

Yanyan Xu

Shuai Xu

Jianli Gai

Wentao Ma

Xiang Wang

Weihua Zhu

Maosong Li

An electrochemical device including a positive electrode, a negative electrode and an electrolyte, wherein the negative electrode comprises a negative electrode active material layer, including a negative electrode active material, wherein the negative electrode active material includes a silicon-containing compound; and the negative electrode active material further includes, on the surface, a protective layer including a compound having an S═O bond.

Electrolyte and electrochemical device

A battery includes an electrode assembly, an electrolytic solution, a package accommodating the electrode assembly, a first tab, a second tab, and a first filler. The electrode assembly is formed by winding a first electrode plate and a second electrode plate stacked. The first current collector includes a first blank region, a first single-surface-coated region, and a first double-surface-coated region. The first blank region includes a first planar region and a first bent region. The first single-surface-coated region includes a second bent region and a second planar region. The first tab is disposed in the first planar region. The second tab is disposed on the second electrode plate. The first filler is disposed in the first planar region or the second planar region. Projections of the first filler, the first tab, and the second tab in a thickness direction of the electrode assembly do not overlap.

Battery

An electrolyte includes diglycolic anhydride and a trinitrile compound, with which the cycle performance and the high-temperature stability under over-discharge conditions of lithium-ion batteries are significantly improved. The electrolyte includes a compound of Formula I; and at least one of a compound of Formula II or a compound of Formula III; R, R, Rand Rare each independently selected from hydrogen, halo, substituted or unsubstituted C-Calkyl, substituted or unsubstituted C-Calkenyl, substituted or unsubstituted C-Calkynyl, substituted or unsubstituted C-Caryl, substituted or unsubstituted C-Calkoxy, or substituted or unsubstituted C-Caryloxy, wherein when substituted, the substituent is halo, cyano, or C-Calkyl; and a, d and f are each independently selected from an integer from 1 to 5, and b, c, e, g, h and i are each independently selected from an integer from 0 to 5.

A lower plastic member, an end cover assembly, an energy storage apparatus, and a power consuming device are provided. The lower plastic member includes a body having a first surface and a second surface, an explosion-proof recessed platform having a first top surface and a first bottom wall, a first recessed platform having a second top surface and a second bottom wall, a second recessed platform having a third top surface and a third bottom wall, a first terminal-boss, and a second terminal-boss. A first surface-roughness A of each of the first surface, the second bottom wall, the third bottom wall, the fourth bottom wall, the fifth bottom wall is less than a second surface-roughness B of each of the second surface, the first bottom wall, the first top surface, the second top surface, the third top surface, the fourth top surface, and the fifth top surface.

Lower plastic member, end cover assembly, energy storage apparatus, and power consuming device

An electrochemical device, including a positive electrode, a negative electrode, a separator and an electrolyte. The electrolyte includes a nitrile compound, and the mass percentage of the nitrile compound in the electrolyte is A %; the negative electrode includes a current collector, wherein the current collector includes a first region and a second region; the first region is provided with a negative electrode active substance layer; the second region does not include a negative electrode active substance layer; the area of the second region is B % of the surface area of the current collector; and A×B<600.

An electrolyte includes a compound represented by formula I-A, where A, A, and Aare each independently selected from formula I-B or formula I-C, and at least two of A, A, and Aare formula I-C. In formula I-A, n is selected from integers 1 to 10, and m is selected from 0 or 1. In formula I-B and formula I-C,represents a site at which two adjacent atoms are joined. The electrolyte can significantly improve high-temperature storage performance, cycle performance, and floating charge performance of the electrochemical device.

Electrolyte, electrochemical device, and electronic device

An electrolyte including one or more nitrile benzoquinone compounds, and the nitrile benzoquinone compound is selected from the group consisting of the compounds represented by formula I, formula II, and formula III: The substituents Rto Rare each independently selected from the group consisting of hydrogen, a Cto Cether group, a Cto Calkoxy group, halogen, a Cto Calkyl group, a Cto Calkenyl group, a Cto Calkynyl group, and a Cto Caryl group. The electrolyte can form a stable protective film on a cathode, thereby increasing the cycle capacity retention rate and high temperature storage performance of an electrochemical device.

Electrolyte, and electrochemical device and electronic device including same

An electrochemical apparatus includes an electrolyte, a positive electrode and a negative electrode, the negative electrode includes a negative active material layer, the negative active material layer includes a negative active material, the electrolyte includes fluoroethylene carbonate, and the electrochemical apparatus satisfies the following relational expressions: 0.5<R/R<1.5 and both Rand Rare less than 35 milliohms, and 0.005≤A/B≤0.1; where Rrepresents a charge transfer resistance under 50% state of charge at 25 degrees Celsius, and Rrepresents a concentration polarization resistance in the 50% state of charge at 25 degrees Celsius; a mass of the fluoroethylene carbonate corresponding to 1 g of the negative active material is A g, and a specific surface area of the negative active material is B m/g. This application aims to improve the fast charging performance of the electrochemical apparatus while maintaining the cycle performance thereof.

Electrochemical apparatus and electronic apparatus containing same

An electrochemical device including an anode having an anode current collector and a skeleton layer, the skeleton layer being disposed in an central region on the anode current collector, and a region, not covered by the skeleton layer, on the anode current collector being provided with an insulation layer; a cathode; and an electrolyte including about 1 wt % to about 40 wt % of a sulfone compound, about 1 wt % to about 40 wt % of a phosphorus compound and about 1 wt % to about 70 wt % of a fluoroether compound, based on the total weight of the electrolyte. The electrochemical device has superior cycle performance and safety performance.

Electrochemical device and electronic device

An electrochemical device includes a positive electrode, a negative electrode, a separator located between the positive electrode and the negative electrode, and an electrolytic solution. The positive electrode includes a positive current collector and a positive active material layer disposed on the positive current collector. The positive active material layer includes a positive active material. The positive active material includes an element A. The element A is selected from at least one of Al, B, Ca, Mg, Ti, Cu, Nb, Si, Zr, Y, or W. The electrolytic solution includes at least one of 1,3-propane sultone or a derivative thereof. A mass ratio of the element A in the positive active material to 1,3-propane sultone or a derivative is 1:0.2 to 1:50.

Electrochemical device and electronic device containing same

An electrolyte includes a compound of formula 1: Rand Rare each independently selected from H, halogen atom, a substituted or unsubstituted Calkyl group, a substituted or unsubstituted Ccycloalkyl group, a substituted or unsubstituted Calkenyl group, a substituted or unsubstituted Calkynyl group, a substituted or unsubstituted Calkoxy group, a substituted or unsubstituted Caryl group, a substituted or unsubstituted Cheteroaryl group, or any combination thereof. R is selected from a substituted or unsubstituted Calkyl group, a substituted or unsubstituted Ccycloalkyl group, a substituted or unsubstituted Calkenyl group, a substituted or unsubstituted Calkynyl group, a substituted or unsubstituted Calkoxy group, a substituted or unsubstituted Caryl group or a substituted or unsubstituted Cheteroaryl group, a substituted or unsubstituted Cheterocycloalkyl group, a butyrolactam group, or any combination thereof.

Electrolyte and electrochemical apparatus using same

An electrochemical apparatus, including a positive electrode, a negative electrode, an separator, and an electrolyte, wherein the positive electrode comprises a current collector and a positive active material layer, and the positive active material layer comprises a positive active material; and the electrolyte comprises a compound of Formula I:

Electrolyte and electrochemical apparatus

An electrochemical apparatus including a positive electrode, a negative electrode, an electrolyte, and a separator. The positive electrode includes a positive electrode current collector and a positive active material layer disposed on the positive current collector. An X-ray photoelectron spectroscopy of the positive active material layer has a peak at 164 eV to 175 eV. The electrolyte has a retention capability of 1.0 g/Ah to 4.0 g/Ah. The electrolyte improves cycle performance, over-discharge storage performance, and safety performance of the electrochemical apparatus.

An electrolyte, comprising a compound of Formula I and an additive A, R, R, R, R, R, R, Rand Rare each independently selected from: hydrogen, halo, —COOX, substituted or unsubstituted Calkyl, substituted or unsubstituted Calkenyl, substituted or unsubstituted Calkynyl, substituted or unsubstituted Calkoxy, or —R—S(═O)—R, wherein Ris selected from substituted or unsubstituted Calkylene, Ris selected from halo or substituted or unsubstituted Calkyl, and at least one of R, R, R, R, R, R, Rand Ris —COOX. When substituted, the substituent is selected from cyano or halo; and

An electrochemical device, including a positive electrode, a negative electrode and an electrolytic solution. The positive electrode includes a positive electrode current collector and a positive active material layer having a positive active material. The negative electrode includes a negative electrode current collector and a negative active material layer having a negative active material. The electrolytic solution includes a lithium ion and an anion represented by Formula I:

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Ningde, China

Jianming Zheng