Electrode plate, and battery comprising same

A technology of electrode pole piece and positive pole piece, which is applied in the field of battery and lithium battery, and can solve the problem of long charge transfer path

Active Publication Date: 2021-09-14
JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the objectives of the present invention is to provide an electrode pole piece to solve the problem of longer charge transfer path caused by the increasing coating weight and thickness of the pole piece design, thereby improving the rate charging of the battery ability, improving the cycle life and safety of the battery

Method used

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  • Electrode plate, and battery comprising same
  • Electrode plate, and battery comprising same
  • Electrode plate, and battery comprising same

Examples

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Embodiment 1

[0041] A battery comprising a positive electrode sheet, a negative electrode sheet, a diaphragm and an electrolyte between the positive electrode sheet and the negative electrode; wherein the positive electrode sheet is used as an active material, including an aluminum foil, a first coating and a second coating. The first coating is applied to at least one surface of the aluminum foil; the second coating is applied to a surface of the first coating away from the aluminum foil, the first coating and the second coating OI 1 / Oi 2 = 1.25; The negative electrode sheet is used as a conventional graphite as an active material, and there is no first coating and the second coating, the separator and the electrolyte are also conventional design; then the positive electrode sheet, the diaphragm and the negative electrode sheet Core, injecting the electrolyte, assembles a lithium ion battery.

Embodiment 2～10

[0043] Unlike Example 1, positive electrode sheet OI 1 / Oi 2 The ratio, the specific value seeing is as follows.

[0044] The rest is not described herein again.

Embodiment 11

[0046] A battery comprising a positive electrode sheet, a negative electrode sheet, a diaphragm and an electrolyte between the positive electrode sheet and the negative electrode sheet; wherein the negative electrode sheet is graphite as an active substance comprising a copper foil, a first coating and a second coating; The first coating is applied to at least one surface of the copper foil; the second coating is applied to a surface, the first coating and the second coating of the first coating. 1 / Oi 2 = 1.17; The positive electrode sheet is used as the active substance using conventional ternary 523, and the separator and electrolyte are also conventional design; then the positive electrode sheet, the diaphragm and the negative electrode sheet The battery is injected into the electrolyte, and the lithium ion battery is assembled.

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Abstract

The invention provides an electrode plate, and a battery containing the same. The electrode plate comprises a current collector, a first coating and a second coating; the first coating coats at least one surface of the current collector; the second coating coats one surface, far away from the current collector, of the first coating; and the OI value of the second coating is smaller than that of the first coating. Compared with the prior art, the electrode plate has the advantages that in order to ensure the energy density of the battery, the thicker coating layer is divided into the first coating and the second coating for coating respectively, and then the OI value of the second coating is set to be smaller than the OI value of the first coating by regulating and controlling the OI values of the first coating and the second coating, so that the overall OI value of the electrode plate is lower; and the second coating has good dynamic performance and liquid retention and absorption capability, so that the rate charging capability is improved, the cycle life of the battery is prolonged, and the safety of the battery is improved.

Description

Technical field [0001] The present invention relates to the field of lithium batteries, particularly relates to a battery electrode pole piece and pole pieces containing the electrodes. Background technique [0002] Lithium-ion batteries as a new energy, a high energy density, high capacity, long cycle life, no memory effect, etc., has been widely used in electronic products and electric vehicles. As technology advances, electronic products demands on battery energy density is higher and higher, and with the increasing demand of battery energy density, a pole piece design of the coating weight and thickness is also growing, but so will cause the charge transfer path becomes long, deterioration of the battery charge and discharge rate capability, cycle life and reduced safety. [0003] Needed, therefore, desirable to provide a solution to the above technical problem. Inventive content [0004] One object of the present invention is: to provide an electrode pole pieces to solve th...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M10/0525H01M10/058
CPCH01M4/13H01M10/0525H01M10/058Y02P70/50Y02E60/10H01M4/0404H01M4/1393H01M4/139
Inventor 邹武元华秉杨
Owner JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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