Ningde Amperex Technology Limited

Junfei Liu

Chao Tang

Jianming Zheng

Shuirong Zhang

Lilan Zhang

Juan Ma

Wenqiang Li

Bin Wang

Qian Wen

Xiexue Peng

Jiqiong Liu

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

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.

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 electrolytic solution includes a compound containing a —CN functional group and a compound containing a silicon functional group. M is C or Si. R, R, and Rare each independently selected from a substituted or non-substituted C-Calkylene group, a substituted or non-substituted C-Calkenylene group, an O—R group, an R—S—R group or an R—O—R group, Rand R are each independently selected from a substituted or non-substituted C-Calkylene group. n is 0 or 1. Ris H, fluorine, a cyano group, a substituted or non-substituted C-Calkyl group, a substituted or non-substituted C-Calkenyl group, an O—Rgroup, an R—S—Rgroup, or an R—O—Rgroup. Ris a substituted or non-substituted C-Calkylene group, and Ris a substituted or non-substituted C-Calkyl group.

Electrolytic solution and electrochemical device using the 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

The present application relates to an electrolyte and an electrochemical device including the same. The electrolyte includes a diboronic acid compound and a nitrile compound, so that the storage performance and cycle performance of the electrochemical device using the electrolyte can be remarkably improved.

An electrolyte including an imidazolium salt compound and a pyridine compound. The electrolyte, includes a compound of Formula I and a compound of Formula II: where Ris selected from halo, cyano, substituted or unsubstituted C-Calkyl, substituted or unsubstituted C-Calkenyl, substituted or unsubstituted C-Calkynyl, substituted or unsubstituted C-Calkoxy, substituted or unsubstituted C-Ccycloalkyl, and substituted or unsubstituted C-Caryl; and R, R, R, Rand Rare each independently selected from H, halo, cyano, substituted or unsubstituted C-Calkyl, substituted or unsubstituted C-Calkenyl, substituted or unsubstituted C-Calkynyl, substituted or unsubstituted C-Calkoxy, substituted or unsubstituted C-Ccycloalkyl, and substituted or unsubstituted C-Caryl; when substituted, the substituent is halo or cyano. The electrolyte has high stability and can significantly improve the cycle performance and high-temperature storage performance of electrochemical devices.

Electrolyte and electrochemical device using the same

The present application relates to an electrolytic solution and an electrochemical device comprising the electrolytic solution. The electrolytic solution comprises a carbonate compound having a silicon-containing functional group, so as to significantly improve the overcharge performance and high-temperature storage performance of an electrochemical device using the electrolytic solution.

Electrolytic solution and electrochemical device

The present application relates to a gel polymer electrolyte and an electrochemical device comprising the gel polymer electrolyte. The gel polymer electrolyte according to the present application comprises a polymer film and an organic electrolytic solution comprising a lithium salt, a phosphate ester compound, and a fluoroether compound. The gel polymer electrolyte according to the present application has higher ionic conductivity and better electrochemical stability, and is capable of significantly improving the safety and cycle performance of the electrochemical device.

Gel polymer electrolyte and electrochemical device comprising the same

The present application relates to an electrolyte and an electrochemical device. The electrolyte includes an organic solvent, an additive and a lithium salt, the additive including a cyclic borate and a nitrile compound. The electrolyte of the present application has good stability at a high working voltage. In another embodiment of the present application, the combination of the electrolyte and an anode having a high compacted density provides a high energy density for the electrochemical device, and improves the storage, floating charge and dynamicperformance of the electrochemical device.

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Ningde, China

Junfei Liu