Ningde Amperex Technology Limited

Contemporary Amperex Technology Co., Ltd.

Chao Tang

Jianming Zheng

Shuirong Zhang

Junfei Liu

Lilan Zhang

Wenqiang Li

Xiexue Peng

Juan Ma

Qian Wen

Haiyang Nan

Jiqiong Liu

Chunrui Xu

Zhu Feng

Xiangkun Bo

Hui Cui

Weihua Zhu

Kai Liu

Xiaoqing Xue

Jieyan Sun

Shijie Wu

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, 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 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 at least a compound of formula I: A, A, and Aare each independently selected from the following formulas I-A, I-B, I-C, or I-D, and the A, A, and Aare not all I-A: m and k are 0 or 1, and n is integer from 1 to 6. R, R, R, R, R, R, R, R, R, R, R, and Rare selected from hydrogen; substituted or unsubstituted C-Calkylidene groups, C-Calkenylene groups, C-Calkynylidene groups, C-Ccumulative dienyl groups, C-Caryl groups, or C-Calicyclic hydrocarbon groups. Ris selected from substituted or unsubstituted C-Calkyl groups, C-Calkenyl groups, C-Calkynyl groups, C-Ccumulative dienyl groups, C-Caryl groups, C-Calicyclic hydrocarbon groups, or heteroatom-containing functional groups.

Electrolyte, and electrochemical device and electronic device comprising the same

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 electrochemical device comprising a separator and an electrolyte, wherein the separator comprises a first porous layer and a second porous layer; and the electrolyte comprises at least one compound containing 2 to 3 cyano groups.

Electrochemical 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 comprises a first region and a second region; the first region is provided with a negative electrode active substance layer; the second region does not comprise 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, including: 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, fluoro, 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 fluoro, 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 electrolyte includes at least one of a compound of Formula I, a compound of Formula II or a compound of Formula III; and a compound of Formula IV; where, R, R, R, R, R, R, R, Rand Rare independently selected from H, halo, cyano, substituted or unsubstituted C-Calkyl, substituted or unsubstituted C-Calkenyl, and substituted or unsubstituted C-Caryl; Rand Rare independently selected from H, F, cyano, substituted or unsubstituted C-Calkyl, substituted or unsubstituted C-Calkenyl, substituted or unsubstituted C-Caryl, R&#x2014;(O&#x2014;R), or (O&#x2014;R); and Rand Rare independently selected from R&#x2014;(O&#x2014;R) or (O&#x2014;R). Ris selected from substituted or unsubstituted C-Calkyl; R, Rand Rare independently selected from substituted or unsubstituted C-Calkylene, C-Calkenylene, or C-Caryl.

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Ningde, China

Chao Tang