Ningde Amperex Technology Limited

Mingming Guan

Jianming Zheng

Wenqiang Li

Yali Xiong

Jianyu Liu

Jian Liu

Xiangling Zheng

Li Wenqiang

Xiang Wang

Hui Cui

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 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 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

Electrolyte and electrochemical device

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:

Electrochemical device and electronic device containing same

An electrolytic solution includes the compound of Formula I and a carboxylate compound: The electrochemical device prepared with the electrolytic solution has reduced storage impedance, and improved post-storage swelling, overcharge performance and hot box performance.

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Ningde, China

Mingming Guan