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A lithium ion capacitor composite negative electrode sheet and preparation method thereof, and lithium ion capacitor

A negative electrode and capacitor technology, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems that the negative electrode gas cannot be discharged in time, and the electrolyte cannot fully contact the lithium sheet, so as to achieve good product consistency, reduce the probability of self-discharge, and process high efficiency effect

Active Publication Date: 2018-03-02
CALB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a lithium ion capacitor composite negative plate, to solve the problems in the prior art that the electrolyte on the negative plate of the lithium ion capacitor cannot fully contact with the lithium plate and the gas on the surface of the negative plate cannot be discharged in time

Method used

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  • A lithium ion capacitor composite negative electrode sheet and preparation method thereof, and lithium ion capacitor
  • A lithium ion capacitor composite negative electrode sheet and preparation method thereof, and lithium ion capacitor

Examples

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Embodiment 1

[0039] The lithium ion capacitor composite negative electrode sheet of the present embodiment comprises a negative electrode sheet, and the negative electrode sheet includes a negative electrode current collector copper foil and a negative electrode active material layer coated on both surfaces of the negative electrode current collector, and the negative electrode active material layer is composed of negative electrode active material hard carbon, The conductive agent Super P and the binder polyvinylidene fluoride (PVDF) are evenly mixed according to the mass ratio of 90:3:7. The thickness of the negative electrode sheet is 200 μm, and the surface of the negative electrode active material layer on both sides of the negative electrode sheet is uniformly laid with lithium strips. , the thickness of the lithium ribbon is 20 μm, the width of the lithium ribbon is 10 mm, the gap between two adjacent lithium ribbons on each side of the negative plate is about 10 mm, and the ratio of ...

Embodiment 2

[0048] The lithium ion capacitor composite negative electrode sheet of the present embodiment comprises a negative electrode sheet, and the negative electrode sheet includes a negative electrode current collector copper foil and a negative electrode active material layer coated on both surfaces of the negative electrode current collector, and the negative electrode active material layer is composed of negative electrode active material hard carbon, The conductive agent Super P and the binder polyvinylidene fluoride (PVDF) are evenly mixed according to the mass ratio of 90:3:7. The thickness of the negative electrode sheet is 200 μm, and the surface of the negative electrode active material layer on both sides of the negative electrode sheet is uniformly laid with lithium strips. , the thickness of the lithium strip is 50 μm, the width of the lithium strip is 5 mm, the gap between two adjacent lithium strips on each side of the negative electrode sheet is about 20 mm, and the rat...

Embodiment 3

[0057] The lithium ion capacitor composite negative electrode sheet of the present embodiment comprises a negative electrode sheet, and the negative electrode sheet includes a negative electrode current collector copper foil and a negative electrode active material layer coated on both surfaces of the negative electrode current collector, and the negative electrode active material layer is composed of negative electrode active material hard carbon, The conductive agent Super P and the binder polyvinylidene fluoride (PVDF) are evenly mixed according to the mass ratio of 90:3:7. The thickness of the negative electrode sheet is 200 μm, and the surface of the negative electrode active material layer on both sides of the negative electrode sheet is uniformly laid with lithium strips. , the thickness of the lithium strip is 40 μm, the width of the lithium strip is 8 mm, the gap between two adjacent lithium strips on each side of the negative electrode sheet is about 15 mm, and the rat...

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Abstract

The invention relates to a lithium-ion capacitor composite negative plate, a preparation method thereof and a lithium-ion capacitor, belonging to the technical field of lithium-ion capacitors. The lithium ion capacitor composite negative electrode sheet of the present invention includes a negative electrode sheet, and the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer coated on the surface of the negative electrode current collector, and the surface of the negative electrode active material layer is covered with more than two lithium batteries. There is a gap between two adjacent lithium strips. The composite negative plate of the lithium ion capacitor of the present invention can not only quickly infiltrate the electrolyte and lithium, ensure that the negative plate is fully intercalated with lithium, but also provide an “escape” channel for the gas generated on the surface of the negative plate, so that the gas can be discharged in time.

Description

technical field [0001] The invention relates to a lithium-ion capacitor composite negative plate, a preparation method thereof and a lithium-ion capacitor, belonging to the technical field of lithium-ion capacitors. Background technique [0002] With the deepening of energy utilization, various energy storage devices such as lead-acid batteries, nickel-metal hydride batteries, lithium-ion batteries, etc. have achieved great development. With the rapid development of the electric vehicle market in recent years, the requirements for the energy density and power density of energy storage devices are also getting higher and higher. The energy density of traditional secondary batteries is high, but the power density is low, which cannot meet the power requirements of electric vehicles. The power requirements of the power supply, while the energy density of traditional capacitors is low, and it cannot meet the energy density requirements of electric vehicles for power supplies. In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/50H01G11/22H01G11/30H01G11/32
CPCY02E60/13
Inventor 平丽娜王栋梁李洪涛周志勇
Owner CALB CO LTD