Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology (Hong Kong) Limited

Contemporary Amperex Technology Limited

Xin Liu

Qisen Huang

Jia Peng

Mingling Li

Chengdu Liang

Xianghui Liu

Cheng Li

Huafeng Huang

Shiwen Wang

Changliang Sheng

Yingjie Guan

Yuzhen Zhao

Yan Wen

Zuyu Wu

Meng Qin

Quisen Huang

A negative electrode composite current collector including a copper plating solution is described. The copper plating solution includes a leveling agent represented by a general formula (1)

Copper plating solution and negative electrode composite current collector prepared using same

This application discloses a negative current collector, a negative electrode plate, an electrochemical apparatus, a battery module, a battery pack, and a device. The negative current collector includes a support layer and a metal conductive layer that is disposed on at least one of two opposite surfaces of the support layer in a thickness direction of the support layer. A density of the support layer is less than a density of the metal conductive layer; and the density of the metal conductive layer is 8.0 g/cmto 8.96 g/cm. A thickness Dof the metal conductive layer is 300 nm≤D≤2 μm. When a tensile strain of the negative current collector is 2.5%, a sheet resistance growth rate T of the metal conductive layer is T≤5%.

Negative current collector, negative electrode plate, electrochemical apparatus, battery module, battery pack, and device

A positive electrode current collector and a positive electrode plate, a battery, a battery module, a battery pack, and an apparatus including the positive electrode current collector are provided. In some embodiments, a positive electrode current collector is provided, including an organic support layer and an aluminum-based conductive layer disposed on at least one surface of the organic support layer, where the aluminum-based conductive layer contains Al and at least one modifying element selected from O, N, F, B, S, and P, an XPS spectrogram of the aluminum-based conductive layer with a surface passivation layer removed through etching has at least a first peak falling in a range of 70 eV to 73.5 eV and a second peak falling in a range of 73.5 eV to 78 eV, and a ratio x of peak intensity of the second peak to that of the first peak satisfies 0<x≤3.0.

Positive electrode current collector and positive electrode plate, battery, battery module, battery pack, and apparatus containing such positive electrode current collector

This application provides a copper plating solution for a composite current collector, including a leveling agent represented by a general formula (1)

A positive current collector, a secondary battery, and an electrical device are provided. In some embodiments, the positive current collector includes: a support layer; and a conductive layer located on at least one surface of the support layer, where the conductive layer includes a first metal portion configured to connect to a tab, where, along a thickness direction of the conductive layer, the first metal portion includes at least three sublayers, and melting points of the at least three sublayers rise stepwise in ascending order of distance from the support layer. In the embodiments of this application, the first metal portion includes at least three sublayers, and the melting points of the at least three sublayers rise stepwise in ascending order of distance from the support layer, thereby helping increase a bonding force between the conductive layer and the support layer and reducing the probability of peel-off and delamination between the layers.

Positive current collector, secondary battery, and electrical device

This application provides a current collector and a preparation method thereof, a secondary battery containing such current collector, a battery module, a battery pack, and an electric apparatus. The current collector in this application includes a support layer, a binder layer, and a metal layer, where the binder layer is arranged between the support layer and the metal layer, the binder layer includes an organic binder and inorganic particles, a thickness Dof the binder layer is 1.0-5.0 &#x3bc;m, optionally 1.0-3.0 &#x3bc;m; and the inorganic particles include large particles with a median particle size Dand small particles with a median particle size D, and the median particle sizes of the large particles and the small particles satisfy the following relationships: D&#x3e;D; D=(0.5-0.9)&#xd7;D; and D=(0.1-0.4)&#xd7;D.

Current collector and preparation method thereof, secondary battery, battery module, battery pack, and electric apparatus

A positive electrode current collector and a positive electrode plate, a battery, a battery module, a battery pack, and an apparatus including the positive electrode current collector are provided. In some embodiments, a positive electrode current collector is provided, including an organic support layer and an aluminum-based conductive layer disposed on at least one surface of the organic support layer, where the aluminum-based conductive layer contains Al and at least one modifying element selected from O, N, F, B, S, and P, an XPS spectrogram of the aluminum-based conductive layer with a surface passivation layer removed through etching has at least a first peak falling in a range of 70 eV to 73.5 eV and a second peak falling in a range of 73.5 eV to 78 eV, and a ratio x of peak intensity of the second peak to that of the first peak satisfies 0&#x3c;x&#x2264;3.0.

This application discloses a lithium-ion secondary battery. The lithium-ion secondary battery includes a positive electrode plate, a negative electrode plate, a separator, and an electrolytic solution. The positive electrode plate includes a positive electrode current collector and a positive active material layer disposed on a surface of the positive electrode current collector and containing a positive active material, and the negative electrode plate includes a negative electrode current collector and a negative active material layer disposed on a surface of the negative electrode current collector and containing a negative active material; wherein the positive active material includes lithium iron phosphate, and the negative active material includes graphite; and wherein the positive electrode current collector and/or the negative electrode current collector is a composite current collector, and the composite current collector includes an organic support layer and a conductive layer disposed on at least one surface of the organic support layer.

Lithium-ion secondary battery

The present disclosure provides a lithium ion secondary battery, a battery core, a negative electrode plate and an apparatus containing the lithium ion secondary battery. The lithium ion secondary battery includes a battery core and an electrolytic solution, the battery core including a positive electrode plate comprising a positive current collector and a positive active material layer, a separator, and a negative electrode plate comprising a negative current collector and a negative active material layer, wherein the positive current collector and/or the negative current collector are a composite current collector, the composite current collector comprises a polymer-based support layer and a conductive layer disposed on at least one surface of the support layer, and the composite current collector has a thermal conductivity in a range of 0.01 W/(m&#xb7;K) to 10 W/(m&#xb7;K), preferably in a range of 0.1 W/(m&#xb7;K) to 2 W/(m&#xb7;K).

Lithium ion secondary battery, battery core, negative electrode plate, and apparatus

The present disclosure provides a negative current collector (), a negative electrode plate (), an electrochemical device, and an apparatus. The negative current collector () includes a support layer, and a conductive layer () disposed on at least one of two opposite surfaces of the support layer () in a thickness direction of the support layer; wherein the support layer () has a smaller density than the conductive layer (); the conductive layer () has a thickness Dsatisfying 300 nm&#x2264;D&#x2264;2 &#x3bc;m, preferably 500 nm&#x2264;D&#x2264;1.5 &#x3bc;m; and when the negative current collector () has a tensile strain of 1.5%, the conductive layer () has a sheet resistance growth rate T satisfying T&#x2264;5%.

Negative current collector, negative electrode plate, electrochemical device, and apparatus

The present application provide a secondary battery and related battery module, battery pack and apparatus. The secondary battery includes a positive electrode plate, a negative electrode plate, a separator and an electrolyte, wherein the secondary battery includes a positive active material selected from one or more of layered lithium nickel cobalt manganese oxide and layered lithium nickel cobalt aluminum oxide, and a negative active material including graphite and silicon-oxygen compound; the delithiation capacity A of the negative electrode film in the voltage range of 0.005V to the delithiation platform voltage and the delithiation capacity B of the negative electrode film in the voltage range of the delithiation platform voltage to 1.2V satisfy: 1A/B2; and when the secondary battery is discharged to a voltage of 2.5V, the voltage U of the negative electrode plate relative to a lithium metal reference electrode satisfies: 0.5VU0.7V.

Secondary battery, and related battery module, battery pack and apparatus

The present disclosure relates to the technical field of battery, and in particular, relates to a current collector, an electrode plate and an electrochemical device. The current collector includes an insulation layer; a conductive layer located on at least one surface of the insulation layer; and a first protective layer provided on a surface of the conductive layer facing away from the insulation layer. The first protective layer is made of a metal. The current collector is provided with a plurality of holes penetrating through the insulation layer, the conductive layer and the first protective layer.

Current collector, electrode plate and electrochemical device

The present disclosure relates to the technical field of battery, and in particular, relates to a current collector, an electrode plate including the current collector, and an electrochemical device. The current collector includes an insulation layer; and a conductive layer at least located on at least one surface of the insulation layer. The conductive layer has a room temperature thin film resistor of R, where 0.01&#x3a9;/&#x25a1;&#x2264;R&#x2264;0.15&#x3a9;/&#x25a1;. The current collector is provided with a plurality of holes penetrating through the insulation layer and the conductive layer.

Current collector, electrode plate including the same and electrochemical device

The present disclosure relates to the technical field of battery, and in particular, relates to a current collector, an electrode plate including the current collector, and an electrochemical device. The current collector includes an insulation layer; and a conductive layer at least located on at least one surface of the insulation layer. The conductive layer has a thickness of D, where 30 nm&#x2264;D&#x2264;3 &#x3bc;m. The current collector is provided with a plurality of holes penetrating through the insulation layer and the conductive layer.

A current collector, an electrode plate, and an electrochemical device are provided in the present disclosure. The current collector includes an insulation layer and at least one conductive layer. The insulation layer is used to support the conductive layer. The at least one conductive layer is used to support an electrode active material layer and is located above at least one surface of the insulation layer. The insulation layer has a density smaller than that of the conductive layer. A metal protective layer is arranged on at least one surface of each of the at least one conductive layer.

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Ningde, China

Xin Liu