Ningde Amperex Technology Limited

Contemporary Amperex Technology Co., Ltd.

Ningde Contemporary Amperex Technology Limited

Kefei Wang

Qiao Zeng

Liangzhen Xiao

Fei Wu

Jing Jiang

Yu Luo

Jiacai Cai

Bing Jiang

Yingying Wang

Zhen Dai

Chenghua Fu

Yongshou Lin

Peipei Guo

Ping He

Yi Zhao

Juan Jin

Shilin Huang

Jibin Geng

Wei Gao

Jinli Wang

Qingwen Zhang

Feng Zhou

Liang Shi

Hongzhan Yang

Jie Chen

An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein, about 3 wt %≤(X+Y)≤about 11 wt %, about 1≤(X/Y)≤about 6, and about 0.01<(Y/Z)≤about 0.3; the trinitrile compound includes at least one selected from the group of 1,3,5-pentanetricarbonitrile; 1,2,3-propanetrinitrile, 1,3,6-hexanetricarbonitrile; 1,2,6-hexanetricarbonitrile, 1,2,3-tris(2-cyanoethoxy)propane; 1,2,4-tris(2-cyanoethoxy)butane, 1,1,1-tris(cyanoethoxymethylene)ethane, 1,1,1-tris(cyanoethoxymethylene)propane, 3-methyl-1,3,5-tris(cyanoethoxy)pentane, 1,2,7-tris(cyanoethoxy)heptane, 1,2,6-tris(cyanoethoxy)hexane, and 1,2,5-tris(cyanoethoxy)pentane.

Electrolyte and electrochemical device

An electrolyte includes a fluorinated cyclic carbonate, and a multi-nitrilemulti-nitrile compound having an ether bond. Based on a total weight of the electrolyte, a weight percentage (C) of the fluorinated cyclic carbonate is greater than a weight percentage (C) of the multi-nitrilemulti-nitrile compound having an ether bond, and about 3<C/C≤about 5.5. The electrolyte can control the expansion of the electrochemical device, so that the electrochemical device has excellent cycle, storage and/or floating-charge performance

Electrolyte and electrochemical device including the same

An electrochemical device including a positive electrode, a negative electrode, and an electrolytic solution. The negative electrode includes a negative current collector and a negative active material layer formed on the negative current collector. The negative active material layer contains a negative active material. A conductive material is disposed between the negative active material layer and the negative current collector. An average particle diameter of the conductive material is smaller than that of the negative active material. The negative active material layer possesses a specific weight. The electrochemical device improves high-temperature cycle expansion performance and overcharge protection performance.

Electrochemical device and electronic device

An electrochemical device including a cathode, an anode and an electrolyte. The anode includes an anode active material layer, and the contact angle of the anode active material layer relative to a non-aqueous solvent is not greater than 60° as measured by a contact angle measurement. The electrochemical device has improved cycle performance.

Electrochemical device and electronic device including same

This application relates to an electrochemical device and an electronic device including the same. In particular, this application provides an electrochemical device, including a cathode, an anode and an electrolytic solution, where the anode includes a carbon material and hydroxyalkyl methylcellulose, and the electrolytic solution includes propionate. The electrochemical device of this application has excellent cycle, storage and low-temperature performance.

An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein, about 2 wt %<(X+Y)≤about 11 wt %, about 0.1≤(X/Y)≤about 4, about 30 wt %≤Z≤about 50 wt %, about 2 wt %<X≤about 6 wt %, and about 0.01<(Y/Z)≤about 0.3; wherein the trinitrile compound comprises at least one selected from the group consisting of 1,3,5-pentanetricarbonitrile; 1,2,3-propanetrinitrile, 1,3,6-hexanetricarbonitrile; 1,2,6-hexanetricarbonitrile, 1,2,3-tris(2-cyanoethoxy)propane; 1,2,4-tris(2-cyanoethoxy)butane, 1,1,1-tris(cyanoethoxymethylene)ethane, 1,1,1-tris(cyanoethoxymethylene)propane, 3-methyl-1,3,5-tris(cyanoethoxy)pentane, 1,2,7-tris(cyanoethoxy)heptane, 1,2,6-tris(cyanoethoxy)hexane, and 1,2,5-tris(cyanoethoxy)pentane.

An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein, about 2 wt %≤(X+Y)≤about 11 wt %, about 1≤(X/Y)≤about 6, about 40 wt %≤Z≤about 50 wt %, and about 0.01<(Y/Z)≤about 0.3; wherein the trinitrile compound comprises at least one selected from the group consisting of 1,3,5-pentanetricarbonitrile; 1,2,3-propanetrinitrile, 1,3,6-hexanetricarbonitrile; 1,2,6-hexanetricarbonitrile, 1,2,3-tris(2-cyanoethoxy)propane; 1,2,4-tris(2-cyanoethoxy)butane, 1,1,1-tris(cyanoethoxymethylene)ethane, 1,1,1-tris(cyanoethoxymethylene)propane, 3-methyl-1,3,5-tris(cyanoethoxy)pentane, 1,2,7-tris(cyanoethoxy)heptane, 1,2,6-tris(cyanoethoxy)hexane, and 1,2,5-tris(cyanoethoxy)pentane.

An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein about 2.2 wt %≤(X+Y)≤about 8 wt %, about 0.1≤(X/Y)≤about 6, 1 wt %<Y<5 wt %, about 30 wt %≤Z≤about 50 wt %, and about 0.02<(Y/Z)≤about 0.3.

A positive active material including a first particle and a second particle. The first particle has a chemical formula of LiCoMO, and the second particle has a chemical formula of LiCoNO. M is at least two selected from the group of Ni, Mn, Al, Mg, Ti, La, Y and Zr. N is at least one selected from a group of Ni, Mn, Al, Mg, Ti, La, Y and Zr, and 0.8≤e≤1.2, 0<g<1, −0.1≤i≤0.2, 0.85≤f≤1.2, 0<h<1, −0.1≤j≤0.2, the number of types of the element M in the first particle is greater than the number of types of the element N in the second particles, the particle diameter of the positive active material meets the following formula (3):(Dv90-Dv50)−(Dv50-Dv10)≤2.5.

Positive active material and lithium-ion battery

An electrochemical device, including a cathode; an anode; and an electrolyte. The anode has an anode mixture layer on an anode current collector, the anode mixture layer includes a carbon material as an anode active material, and at least a part of a surface of the anode mixture layer or a surface of the carbon material comprises a polymer compound having Si—C and Si—O bonds. The electrochemical device has improved cycle performance and storage performance.

An electrochemical apparatus, including a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, and the negative electrode mixture layer includes a negative electrode active substance. An elongation at a yield point of the negative electrode mixture layer and D50 of the negative electrode active substance satisfy a specified relationship, and the electrolyte includes a compound having a cyano group.

Electrochemical apparatus and electronic apparatus

An electrolyte includes a fluorinated cyclic carbonate, a multi-nitrilemulti-nitrile compound having an ether bond and a cyclic phosphonic anhydride. Based on a total weight of the electrolyte, a weight percentage (C) of the fluorinated cyclic carbonate is greater than a weight percentage (C) of the multi-nitrilemulti-nitrile compound having an ether bond. The electrolyte can control the expansion of the electrochemical device, so that the electrochemical device has excellent cycle, storage and/or floating-charge performance.

Electrolyte and electrochemical device comprising the same

An electrolyte includes a fluorinated cyclic carbonate, a multi-nitrilemulti-nitrile compound having an ether bond and a cyclic carbonate having a carbon-carbon double bond. Based on a total weight of the electrolyte, a weight percentage (C) of the fluorinated cyclic carbonate is greater than a weight percentage (C) of the multi-nitrilemulti-nitrile compound having an ether bond. The electrolyte can control the expansion of the electrochemical device, so that the electrochemical device has excellent cycle, storage and/or floating-charge performance.

An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein, about 2 wt %≤(X+Y)≤about 8 wt %, about 0.1≤(X/Y)≤about 6, about 30 wt %≤Z≤about 50 wt %, and about 0.01≤(Y/Z)≤about 0.3; wherein the dinitrile compound is one or more compounds selected from adiponitrile, 1,4-dicyano-2-butene, and ethylene glycol bis(2-cyanoethyl) ether; and the trinitrile compound is one or more compounds selected from 1,3,5-pentanetricarbonitrile; 1,2,3-propanetrinitrile; 1,3,6-hexanetricarbonitrile; 1,2,6-hexanetricarbonitrile; 1,2,3-tris(2-cyanoethoxy)propane; 1,2,4-tris(2-cyanoethoxy)butane; 1,1,1-tris(cyanoethoxymethylene)ethane; 1,1,1-tris(cyanoethoxymethylene)propane; 3-methyl-1,3,5-tris(cyanoethoxy)pentane; 1,2,7-tris(cyanoethoxy)heptane; 1,2,6-tris(cyanoethoxy)hexane; 1,2,5-tris(cyanoethoxy)pentane; and any combination thereof.

An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein, about 2 wt %<(X+Y)≤about 8 wt %, about 0.1≤(X/Y)≤about 6, about 2 wt %<X≤about 6 wt %, about 30 wt %≤Z≤about 50 wt %, and about 0.01≤(Y/Z)≤about 0.3; wherein the dinitrile compound is one or more compounds selected from butanedinitrile, adiponitrile, 1,4-dicyano-2-butene, and ethylene glycol bis(2-cyanoethyl) ether; and the trinitrile compound is one or more compounds selected from 1,3,5-pentanetricarbonitrile; 1,2,3-propanetrinitrile; 1,3,6-hexanetricarbonitrile; 1,2,6-hexanetricarbonitrile; 1,2,3-tris(2-cyanoethoxy)propane; 1,2,4-tris(2-cyanoethoxy)butane; 1,1,1-tris(cyanoethoxymethylene)ethane; 1,1,1-tris(cyanoethoxymethylene)propane; 3-methyl-1,3,5-tris(cyanoethoxy)pentane; 1,2,7-tris(cyanoethoxy)heptane; 1,2,6-tris(cyanoethoxy)hexane; 1,2,5-tris(cyanoethoxy)pentane; and any combination thereof.

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Ningde, China

Kefei Wang